940 0121 Onan 6.5NH (spec P) RV Genset Operations Manual (10 1981)

User Manual: 940-0121 Onan 6.5NH (spec P) RV Genset Operations manual (10-1981)

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Operatorc
Manual
65

NH
GenSet

6.s ru t-t -ict/ltco 4F

Gts,.r.
_...{L

RV Electric Generating Set

@1)r.rsrro

gqHn?t
(SPEC Pl

)l_Lg

SAFETY PRECAUTIONS
Always use an appropriately sized- r \pro .
double-throw transfer switch wilh an'
generalor set. DO NOT PLUG POR I',---v
SrnNoav sers DTREcTLY rNTo A h6usr
RECEPTACLE TO PROVIDE EMERGENCY
POWER. lt is possible for current to flow from
generator into the utility line. This creates extreme hazards to anyone working on lines to

The lollowing symbols in this manual signal potenlially dangerous conditions to the operator or equrpment. FIead this manual carefully. Know when these
conditions can exist- Then, take necessary steps to
prolecl personnel as well as equipment.

mARt ttcl Onan uses

lhlr

restore power.

symbol
lhroughoul thit menull lo
warn ol po3slble 3€rlour penonal lnlury.

IEffi,TO ]llio?Tfl!:l:;"':

Use extreme caution when working on electrical
components. High voltages cause injury ordeath.

Follow allstale and local electrical cod es. Have all
electrical installations performed by a qualilied
licensed electrician.

o"""'o'"

Oo Not Snoke While Servicing B.tleries
Fuels, electrical equipment, batteries, exhaust gases
and moving parts prcsent potential hazard s th at could
result in serious, personal injury- Takecare in lollow-

Lead acid balteies emit a highly explosive
hydrogen gas that can be ignited by electrical
arcing or by smoking.

ing these recommended procedures.

Use Ext.eme Caution Near Gsloline. A con3tant
polenlial erplo3lve or llre hazard exbl8.

Erhaust Gas$ Are Toxic
Provide an adequate exhaust system to propedy

Do nol till luel tank near unit with engine running.
Do not smoke or use open tlame near the unit or

expel discharged gases. Check exhaust system
regularly lor leaks. Ensure that exhaust manifolds

lhe fuel tank.

are secure and not warped.

Be sure all fuel supplies have a positive shutotl

Be sure the unit is well ventilated.

- \::-+

Keep The Unit And Surounding Area Clean

Fuel lines must be of steel piping, adequately
secLrred and free of leaks. Use aflexible section ot
fueltine between generator set and stationaryfu6l
line in the vehicle. This flexible section must be
1000,6 NON-METALLIC to prevent electrical
currents lrom using it as a conductor.
Have a fire extinguisher nearby. Be sure extinguisher is properly maintained and be familiar
with its proper use. Extinguishers rated ABC by
the NFPA are appropdate for all applicalions.
Consult the local fire department lor the correct
type of extinguisher for various applications.

Guard Ag.lntt Elect.lc Shock
Remove electric power before removing protective shields or touching electrical equipment. Use

rubber insulative mats placed on dry wood platlorms overfloors that are metalorconcrete wh€n
around electrical equipment. Do not wear damp
clothing (particularly wet shoes) or allow skin
surlaces to be damp when handling electrical
equipment.

Jewelry is a good conductor of electricity and
should be rcmoved when working on electrical
equipment.

Bemove all oil deposits. Remove all unnecessary
grease and oil from the unit. Accumulated 9rcase
and oil can cause overheating and subsequent
engine damage and may prcsent a potential fire

hazard.
Do NOT storc anything in the generator compartment such as oil or gas cans, oily rags,
chains, wooden blocks, propane tanks, etc. A
fire could result or the gen€rator set operation
(cooling, noise and vibmtion) may be adversely
affected- Keep the compartment lloor cl€an and
dry.

Protect AgaiBt Moving Patt3
Avoid moving parts ot the !nit. Loose jackets,
shirts or sleeves should not be permitted because
ol lhe danger of becoming caught rn moving
parts.

Make sure all nuts and bolts are secure. Keep
power shields and guards in position.

adjustments musl be made while
running, use exlreme caulion a
manifolds, moving parts, etc.

Do not work on lhis equipment when mentally or

physically latigued.

\J/

TO THE OWNER
Welcome to ihe growing lamily ol Onan Power users
. . . We are proud lo have you as a customer.

Bead this manual carefully and observe all safely
rules within. Operating instructions, adiuslmenls and
periodic maintenance procedures are given so that
you ... the owner, can keep your unil running like
new and expect many years of dependable service
from rt. Remember. .. any machine, regardless ol
design or type, will perform only in relation to the
services it receives.
lf your generator set needs specialattention, ask your
Onan dealer for assistance: the Onan Parts and
Service Organization has been factory-lrained to
provide up-lo-date know-how lor keeping your BV
electric generating set "on the road".

TABLE OF CONTENTS
General lnlormation
Specitications
lnslallalion Checks ..............

Operalion...........

Engine Troubleshoollng

.....................

Maintenance
Assembly Torques.. .
Periodic Mainlenance Schedule

Adiuslmenls.........

Conlrol Troubleshooting

2
3
4
6

t0
11

.. .. . .. . .. ..

... . .. .. . .. ... . .. . ..

Remole Accessoriea

'14

15
18
20

WARNING
TO PREVENT FIRE OR ACCIDENT HAZARD. . .
THIS UNIT MUST BE INSTALLED ACCORDING
TO THE MANUFACTUBER'S DETAILED INST ALLAT I O N PROCED URES O BSE RV I N G ALL
MINIMUM CLEARANCES.

TO AVOID POSS/ALF PERSONAI INJURY OR
EQUIPMENT DAMAGE, ANY INSTALLATION
AND ALL SERY/CE MUST BE PERFORMED BY
QUALIFIED PERSONNEL.

GENERAL INFORMATION
YOTJR MANUAL
This manual contains operation and other information to properly maintain, service. and make adjustments on your NH generatorset. Study and follow
the instructions carefully. A well-planned service and
maintenance program will result in longer unit lifeand
better performance. Because the most importantpari
ot repair is diagnosis, a troubleshooting chart is
included.
Throughout the manual, engine end of the generalor
set is the front. Left and right sides are determined
when facing the engine (front) end.
When contacting your Onan dealer, distributor,

orthe
lactory about the generator set, always supply the

complete model number and serial number as shown
on the nameplate (see Model Designation lollowing).
This inlormation is necessary to identily your
generator set among the many types manufactured
by Onan.
Onan electric sets are given a complete running test
under various load conditions and are thoroughly
checked before leaving the factory. Upon receiving
your unjt, check ii thoroughly for any damage that
may have occurred during shipping. Iighten loose
parts, replace missing parts and repair any damage
before operating the unit.

MODEL DESIGNATION
The following typical model number is broken down
into code segments used by Onan.

i
6.5

3C R

TTTT
3456

t6oo4 M

lndrcales krlowall rating.
2. Series identif ication.
Number 3 is the voltage code tor 120/240 volts
single phase. "C" is the code for reconnectible
(120 volts, 2 wiret and 120/240 volts,3 wire).
4. Method of starting: R-remote electric starting.
5. Factory code lor designating optional equipment
1.

il any.
6. Specification letter which advances when the
f actory makes production modif ication.

EIECTBIC

CHOKE

COIL

PLUG
START.STOP

swtlcH

EXHAUST
MANIFOLO

STAFI.STOP
DC FUSES

scRoLf

VIBRATION
ISOLATORS
(FAIL-SAFE)

TYPICAL NH FON FECFEA.rIONAL VEHICLES

--'--./

OIL FILTEF

OIL DRAIN

SPECIFICATIONS
Thl6 manual conlalns Sl herric equlvdenls lhal lollow immedlarely in parenlheses
6ller lhe U,S, cuslomary unils oi mea3ur,

GENERAL

Nominal Dimensions of Set
Height . . .. ... .... .. .
Width .. ... .. . .. .... .
Length .... ... .. .. .. .
Weight ... . . . . .. .. .. .
ENGINE DETAILS

19.50 in. (495 mm)
20.00 in. (508 mm)
33.37 in. (848 mm)
305 lbs. (138 kg)

.,....,,..,,. Onan
Manulacturer.,,...,.
. .. . ... .. . ... . Two
Number ol Cylinders.
Displacement (cubic inches)
. ... ... .... .. ... ..60 inr (983 cm3)
Cylinder Bore
.. . . 3-9/16 in. (90.49 mm)
Piston Stroke. ... . ... .
. 3 in. (76.20 mm)
Compression Ratio ................
. . . . . . . . . . . . . . . . . . 7.0 to
Engine Speed
.. .. ... . .. ... ... 1800 rpm
Engine Design.......
. . .. ... ... Four Cycle, Air Cooled, L-Head
Horizontally Opposed
Starting System
Exciter Cranking (Generator)
lgnition .. ... . .. .. .. .
... .. ... ... Battery
RecommendedFuel................
................Gaso|ine(LeadFreeorRegular)
Average Fuel Consumption
(at rated load & speed) ... .... ... ..
. .. ... . .. ... ... . 1.30 Gallons per Hour (4.92 L)
GENERATOR DETAILS
l/anofacturer..,.,,,.
. ii. . . . . . . . , Onan
Design .. ... ... . .. , . .
Revolving Armature, Four Pole, 1800 rpm
Rating (in watts 60 Hertz) ... .. . .. .. .. ... ...
.. .. 6,500 (6.5 kW)
Voltage . . . . . . . . . . . . .
. . . .12O o( 120/240
Current Rating (amperes)
120 Vo|t . . . . . . . . . . . . .
...54.2 Amperes
240 Vo|t. .. . , .. . .. .. .
...27.1 Amperes
Phase . . . . . . . . . . . . . . . .
........... Single
Wire ... ... ... ... ... .
4 Wire Reconnectible
Output Rating
...... Unity Power Factor
Cranking Current. .. .
100 Amperes (Nominal)
CAPACITIES AND REQUIREMENTS
Oil Capacity. ..... .. .
... ..... 3 U.S. Quarts (2.8 lit) Plus 1/2 Quart for oil filter change
Recommended Battery... ... . .. ..... .
. ... ... .. . ... .. . .12 Volt 74 Amp/Hr (266.40 kC)
Battery Charge Rate (Fixed). .... .... ... ...
. ... . 1-112 Amperes
Ventilataon Requirements (Total-No Restrictions). ..... .. .. ... .. .
120 sq. in. (774 cm,)
TUNE.UP SPECIFICATIONS
Spark Plug Gap .... .. .. .... ... ..
... ... . .. . .025 in. (0.64 mm)
Breaker Point Gap (Cold Setting)... . ....
.. . .016 in. (0.4'1 mm)
lgnitionTiming Reference (Cold SettinS) ,..................
. . . . . . . . . . . . . . . 20' BTC
Valve Tappet Clearance
lntake. ... .. . ... .. .. .
.003 in. (.076 mm)
Exhaust ... . . .. . .... .
.012 in. (0.30 mm)
Cylinder Head Bolt Torque.. ... .. .. .
.....18|b.ft.(24.40N.m)
.

INSTALLATION CHECKS
INSTALLATION

wAtlt ritc

Neady all Onan e ectric generaling sets are installed
by the motor home manuiacturer Although the
manulacturer musl iollow saiety codes when inslalling, certain nstallat on problems cou d ar se aiterthe
unit is installed and subjected to vibration. There are a
few areas thai you as the operatorshould be concerned with. lf in doubt about any aspect of you rgenerator
set's operation or safety, contact your nearest
authorized Onan Service Center. Adaily inspection of

exhausr ga.es .way lrom window and door openings.

FUEL SYSTEM
Wiih set running, check for leaks. Raw fuet will cause
fumes which coutd EXPLODE. Check around carburetor and fuei pump inlets. lrake sure fuel lines are
not rJbbng againsl anytr,.o wnrch could cause
breakaqe.

voJr i-stal'arion should incl.rde the !ollowing.

EXHAUST
Check for leaks around mantfolds, gaskets, and
welds. Make sure exhaust lines are not heating

ELECTRICAL
AC Outpult Al AC leads (M1, [42, [r3 and

M4)

termrnate ir] generator seis junction box. These wires

should be connected to distribution box with multistrand w re enclosed tn a flexible condutt. Check all
w res rlo ano 'rom rae ge.erator set' for fraytng and
loosF co'1reclions For tnlormalton on load connec,
trons refer to operation seclion fo owing.

surrounding areas excessively. lf so, have corrected
mmediately. Remember EXHAUST GASES CONTAIN DEADLY CARBON I\,4ONOXIDE. Be sure aII
holes to the inside ot RV from sel compartment are
sealed to prevent poisonous exhausl gases lrom
entering vehicles.

Battery Connections: Battery positjve (+) connection
connects to slart solenoid Battery negative conneclr
to location on rear of generator. Check terninals on
set and battery ior clean and tight connections.

All exhaLrsi shielding supplied with generator

WANNING

Oo not lermlnare erhau3t unde. vehicte, as
carbon monoxide ga6 Is poisonous. Dlrecl

sel MusT be properly lnstalled to prevent

overhealing ol cofiparlment walls or ihe possibit y ot tire,

33,37"
MIN CLEAFANCE TO TOP

I
19-50"

I/2"

ORAIN HOLES IN ALL
FOUN CORNERS

OIL DRAIN
CLEAFANCE
'1-1/2"

MINIMUII/I SCBOLL
OUILET DIAMETER
9.69" x 4-00"

CLEANANCE

1. OTMENSTONS tN

(

) ARE MTLLIMETERS

2. APPROX WEIGHT: 305

LBS

FLOOR

4. VACU-FLO SCFOLL EXTENDS BELOW MOUNTING PIATE

MASS; 138 kg

5, FOF CUSTOMERS COMPARTMENT HOLE SIZE FOF SCFOIL|

3. A 1_00" (25) MtN CTEARANCE REOUTFED AFOUND

5,1

wlDTH:4.00 (102)

sET ANO ,50 {13) MtN ABOVE CARB TO COMPARTMENT
WALLS OR SOUND TNSUIATTON (OtL FITER UAy
5.2 LENGTH: 9.69 (246)
PROTRUOE INTO 1.0O" (25) CIEABANCE)
FIGURE I. INSTALLATION OUTLINE

Onan recommends using a s€parate ballery lor operalion ol lhe
qeneralor sel in adalilion lo lhe reqular vehicle slarring ballery.
Feler to individual inst6llalion gride or T-012 tor additional
i.lomalion on barlery sharing.

Grounding: Generator must be effeclively bonded to
recreational vehicle chassis

VENTILATION

The biggest enemy of electrc generating sets nstalled in moior homes is excessive heat. Make sure
the set's air nlet and outlet are not plugged wlth dust,
dirt, bugs, leaves or anyihing that could restrict
cooling arr.

For additional inlormation on installation contact
your Onan Service Representaiive or request lnstal atlon Guide #940-0610,

Don l u3e discharged cooling anlorcomparlfwai-Nri6-l menl
healing since il could conl.ln

nor r€rminare exh.ust under vehicle.
f-RrrNc I Do
carbon monoxide qas i3 poisonous. Olrecl
63

ch...ir {l..he) 9rcund tnd rhe ban€ry.nd generalor tel
.ll be elecrrlcrlly connecled lo be sl 0 ground
por.nll.l, All Onln unllr are detlgned lor .eqtllve ground

lrom window and door openlng.,

Vehlclc

ground rhould

Mounilhe

bitert In 3 sep.r.le compadmenl
or..y sprr*-produclngdevlcelo

Irom lhe.el
prevent ll.e or erylo.lon.

On all llsled model3 wlth erhaust lhlelding

l--lWATNING

3upplled wilh unft, .hleldlns

Do nol smoke whil.sedicinq b.tleries, Lead
acid balteries qive olt explosive qases while

DO NOT DISCONNECT BATTEFY CABIES
FROM BATTEFY WHILE GENERAIOF SET
IS CRANKING OR RUNNING:SPARKS MAY CAUSEAN EXPLO-

sroN.
lM

ORTANT: cerlain ttalet (ptnicul!rly c!lllorni!)

haYe

odlnan.$ perlllnlhg ro ihe lyPe .nd u.!ge ot

llat€

erhau3i

multler/!pErk ar€3teB on inlemal combutllon englne. orengine
driven equipmenl when u3ed In . recresllon.l vehicl. luch rs
elecrric gener.llng !e1.. Be !ore you.ln.l!llallon mels rll Federal,

sl.tesnd locrl cod6perl.lningloyourunil,FailureloProvld.and
malnrrh a 3park are.ler mry be in viol.llon ol lh. hw,

IwmNrNGl
ENGINE EXHAUST G AS (CARBON MONOXIDE) IS DEADLY!
Crrbon monoxlde l! an odo e!3, colode.! ga3 lormed by lncofiplele
cohbu3tlon ol hydroca.bon lu€13. Calbon monoxlde l! a drngerous gai lhtl
- l!polenllally lethal. Some olthe 3ymplom3or
csn c!u3e uncon3ciou3ne!3 .nd
3ign3 ot carbon monoxlde inhalallon are:

.
. Olzzlne.!
.
. lnten3e Headsche
. weakness and Sleepiness '
ll

you erperlence any
lmnedlately.

ilusT

prope.ly in3t. ed lo prevenl overheallng ol compddmcnl w.ll! or
rhe polliblllly ol tire, Reter lo apProprlaie ifttallallon guide tot
e.ch model lor delril3,

Vomlllng
Mu3cular Twltchlng
Th.obblng ln TemPles

ol lhe ebove symPlom!,get oul lnlo

lresh air

The b€31p.otectlon again!l ctrbon monoxlde inhslstlon l3a regulat lnspecllon

ot lhe complete 6xhau3l 3yslen, ll you nollce a change ln lhe 3ound or
appe.rrnce ot ethautt rytlem, 3hut lhe unlt down lmmedlately and heve ll
in3pecled and repaired at once by a comPelenl mech.nic.

OPERATION
BEFORE STARTING
lnspeclion: inspect the engine vrsua ly be{ore starCheck lor loose or missing parts orany shipp ng

ling

damaoe.

CRANKCASE OIL
The set o I capacity s3U.S quarts(2.8 lit) plusl/2
quart lor oi fi ter change. FilL the crankcase uniil the
o I reaches the FULL markontheolevelrndicator
(F gure 2). Do NOT OVERFILL. (Overli ling may
cause ioam ng and engine shutdown.) Always
change the o I fiter when changing oil. Refer 10
Periodrc Maintenance Schedule
section lor serv ce lnterval.

OIL

FULL

---

oil evel dailyand changeoil every 100norma]
operating hours. See Figure 3 ior location of o I drain.
It operating n extremely dusty ordirty conditions, the
oil mrght have to be changed sooner. When adding oil
belween changes, use the same brand as in the
crankcase. Vafous brands of oi miqht not be compat ble when mixed.
Check

IEVEL INDICAIOR

KEEP

TEMPEiATUNE RANGE YOU EIPECI B€FOF€ NEIT OIL CHANGE

l\'IAINfENANCE

CAP ANO OIL

AT THIS IEVEL

0244060

.c -30 -20

olL

LEVEL
OIL FILL

NEVEF OPERATE--LgYENGINE WITH OII
BELOW THIS IEVEL

CAP TIGHTLY, ON

OIL LEAKAGE MAY

occuF.

FIGIJRE

CHECKING OIL LEVEL

Be sure to f ll lhe crankcase with oil to the "FULL"
mark on the oil leve indicator. Use oll with the API
(American Petroleum lnslituie) designation SE or
SE/CC Oil should be labeled as having passed MS
Sequence Tests (also known as having passed
AST.4G-lv Sequence Tests). Refer to oil chart for
recommended viscoslty and temperatu re
O I consumption may be higher with a mult grade oil
ihan with a single grade oil ii both oils have com-

parabe viscosities

ai 210'F (99"C).

Therefore,

single grade oils are generally more desirable, un ess
dntrcrpalrng a wrde'ar9e of lenpe'alL'es
Use ol the same grade and quality oi o I asthai Lrsed in
your recreational vehicle engine is acceptable as long
as Lrnit is serviced regularly and oil meets requirements shown in chart.

hA-ttt[,tc
\-l

Do Nor check oll while lhe seneralor sel is
opet.llng. Hol oil could cau3e burn. by

blowing our ol oil lill robe due lo crankcase presure.

FICUFE

OIL ORAIN ANO FILL

RECOMMENDED FUEL
Use clean, fresh, unleaded or regular grade gasoline

Do not use highly leaded premium fuels.

Using

unleaded gasoline results in reduced valve and
catbon cleanout maintenance,
lf the use oi unleaded gasoline rs desired, use regular
gasoline for the flrst 25 hours to allow the ringsto seat
wel for best performance. Then use unleaded gas-

oline therealter.

regular gasoline rs used continually, carbon afd
ead deposits must be removed trom the cylinder
heads as required because ol engine powet loss.
Unleaded gasoline may be used safely alter lead
deposils have been removed.

WAN

NING

Leakage ol gasoline rn or arou.d lhe comparlmenr is a deiinile hazard. The venlilafton

syslem should provide a conslanl llow ol air lo erpel any
accumulalion ol luel vaoor while lhe vehicle is in l,ansil. Comparlmenis musi be vapor lighi lo lhe inlerior to *eep lumes lron

EXERCISE
lnfrequenl use results in hard slartrng. Operale iFe
generator sei one 30-minute period each week Run
onger 11 battery needs charging. Exercising lor one
ong perod each week rs better than several shorl
Periods

BATTERY CHARGING

STARTING
Push the start-siop switch lo the slart

posrtion.
Reiease the switch when engrne slarts. lf engine larls

to siarl, inhrbrtor oil used al the lactory may

have

touled the spark plugs. Remove the p ugs. clean rn a
suitable so vent. dry thoroughly and re-inslall Heavy
exhaust smoke when the engine is iirst started is
normal and caused by the inhibrtor o I

STOPPING
Push the start-slop sw 1ch to the stop position and
hold unlil unil stops complelely

BREAK.IN PROCEDURE
Control ed breakrn with the proper oil and a conscientiously applied maintenance prograrn will hetp
lo assure satrsfaclory service from you r Onan eleclric
generaling set Break-tn as Jolows:
1 OnF lari loJt al 1t2 .oao (w,tr one a r conditioner) and approximately 500 watts additionat
load

2 O.e

l_al' hour at 3,4 load {wrt5 one arr conditioner) and approximately 1500-2000 watts addllional load.

Change crankcase oil atler the first 50 hours of
oPeration.

APPLYING LOAD
ll practical, allow sel to warm Lrp before connecting a
heavy load Continuous generator overloading may

The battery charge rate is conlrolled by a lixed value
res stor ihat allows a irickle charge .ale ol 1 - 1-1/2
amPs

underal conditions.

HIGH OPERATING TEMPERATURES
1. See that noihing obstructs arr l ow lo and trom the

Keep coo rng f ns clean Air housing should be
properly installed and undamaged
3. Keep ignilron I ming properly adiusied.

LOW OPERATING TEMPERATURES
1

Use correct SAE orl lor ternperature condilions.

ol only when engine rs warm. lf
unexpecled lemperature drop causes
Change

an
an

emergency move vehicle to a warm location.
Use iresh gasoline Protecl againsi moisture
condensalion. Below 0'F (-18"C), adjUst carburetor main jel lor a slig ht y richer tuel mixture.
Keep ignition syslem clean, properly adiusted
and balteries in a wel charged cond tion.
Partially restr!cl cool airilow, but use care 1o avoid
overhealing.

A carbu

r.lor .ir pr6hqter llt

afl!ll!bl€ lor cold wearhe, opedlion

-below 45' F (7'C), whlch helF prevenl carbur.lorlclng Order
Kit No. 140-1673.

cause high operaling lemperalures that can damage
lhe windings. Keep lhe load within nameplate rating.

LOAD CONNECTIONS
1. Generator set load wires l\,41, and lv12 terminale
within the junction box. Connect and join wires
within junction box in an approved manner for
desired voltage code. See Figure 4.

Wrres must be adequate size, properly insulaled
and sLrpported.
Mount swrlches and conlrols secure y lo prevent
damage lrom vibratLon and road shocks All

swilches must be vibration proof to prevenl

accidenlal operling or closing whrle the vehicle is
in motron.
4. All winng musl meet applicable locai eleclricaL
codes. Have a qualrtied eeclrician nstall and
rnsPecl the wrrlng.

EXTREMELY DUSTY OR DIBTY
1 Keep unit clean Keep cooling su'aces :::_
2 Servrce all c ealer as f'eqJent / E-i ':::i--.
3 Change crankcase orl every a:
4. Keep oil and gaso ne rn cus:-:
5. Keep governor rnkage c easa
6 Clean generator brijs-:s
mulator do nol rera': _:-:
Do not polish

HIGH ALTITUDE OPEFATTO"
For operalion a: al: :-:- :':51: E=, -: - -rr.=
-:sea level. close ca-a-'=_:- -a- F al,-,stre__ -rE
_6lr:
r+E
E
:-€
ly tO marntai' .':a=- .':E-a.E

ADJUSTT'IEN-S o---.-- *-t ,-* :c-' .'rl :€
".l|Ja
reduced aaa.a: -z'=. 'a-l. :v)tr \'-. *:
r=l
1s':CC
,3':
:tr3
tlF:'*
::.:.:
fee!
--:

POWER REOUIREMENTS FOB APPLIANCES

Approximale
Running Watlage

Appllance or
Tool

Refrigerator
Etectiic broom

......600-1000
..

200-500

Cottee percolator . . . . . . . . . . . . . . . . . . . . . . . . 550-700
Electric frying pan . ... ... . ... ... ... .. 1000-1350
Hair dryer... ... .. .. .. ... ... .... ... .. .. 350-500
Electric stove (perelement) ...... . . .. 350n000
Electric iron .. ... . .. .. .. ... .. . ... . .. 500-1200
Radio .. ... ... ... ... .. .. .. .. . . ...... ... ... 50-200
Electric water heater.. ... .... ... ... ... 1000-1500
Space heater ... .. .. . . .. , ... ... .... ... 1000-1500
Eiectric blanket...................,....... 50-200
Tetevision ... . . .. ... .. .. ... ...... ... ... .. 200-600
.. ... .. 250-750
Electric drill
Battery charger.. . . . .. .... ... ... ... ... . Up to 800
Electric water pump .. ... ... .... ... ... .. 500-600
Air Conditioner . . . . . . . . . . . , . . . . . . . . , . . . .14OO-220O
converter .. .. .... .. .... ... .... .... . .... . 300-350
.. .700-1500
Microwave oven
JOII{ BOTII SL CK IE DS
IIEBE FOB FULI N TIXG

cB2

cBt

G
E

(

UiGNOUTDED LOAD WIBE

LL
EE

sfl{otEctRcull I20 YOIT
outPtll.

TO YEHICLE

LOAD

wHttE

OMUXDED IOAD

STIBE

t 20 voLT LOAD WIRE COI{}aECrlors

G
E

.---------------

IL
EE
R
D
t3

UXGNOUXDEO IOAD WIRE

GROUXDED IOAD WIRE

o
R

120/24.) LOAD W|RE COl{ltECttO
FIGURE

SINGLE-PHASE, ".3C" VOLTAGE CODE GENERATOB COI{NECTIONS

VtNlClE

Operate slart switch.
Enerqizes start solenoid.

Solenoid contacls closi.

Current fed to
generator series field,
cranks engine.

Current fed to eleclric
choke operates
carburetor choke.

Battery currenl fed to
ignition coil and fuel pump

Engine starts.
Operate slart switch until generator speed builds up

Generalor DC current
prod uced.

Release start switch.

Generator supplies current to
ignition, coil and fuel pump.
FICUFE

Recharges bdllery.

SEOUENCE OF OPERATION
Figure 5 shows the operation sequence of the
"RV" electric generating set.

AC output current produced
and ted to load.

SEOUENCE OF OPEFATIOI{

ENGINE TROUBLESHOOTING
\_,

O U BI- ES H O OT IN G

GUIDE

""f,,

CAUSE

,,1.

'.cooLrNc sYsrE|l

(ArR cooLED)

LUBRICATION sYSTEM

THROTTLE AND GOVERNONJi]iii]]]]'.

MAINTENANCE
BATTERY CARE
To increase battery life, the operalor can perform a
number of routine checks and some preventive
maintenance,

1. Keep the battery case clean and dry.
2. Make sure the battery cable connections are
clean and tight. Use a terminal puller when
3.

4.
5.

rcmoving cables for any reason.
Coat the battery terminals with a mineral grease
or petroleum ielly to reduce corrosion and oxjdation.
ldentify each battery cable to be posjtive or
negative before makrng any connection. Always
connect the ground (negative) cable lasl.
Nlaintain the electrolyte level by adding water
(drinking quality or bette.) as needed for f illing to
split level marker. (The water ingredient of the
electrolyte evaporates, but the sulphuric acid
ingredient remains- Thercfore, add water, not
electrolyte.
Avoid overcharging when recharging. Stop the
boost charge when the specific aravity is 1.260
and the electrolyte is 80'F (26.7'C).

ELEMENT

FIGUFE

ONAN FUEL PUMP

AIR CLEANER ELEMENT
ELECTRIC FUEL PUMP
Service of the fuel pump is limited to cleaning the
filter. Every 100 hours, drain the fuel pump and check
the filter element. Turn the hex nut on the base of the
pump to gain access to the filter element- lf ihe
element appears dirty, rcplace it. Be sure to replace
gaskets when reassembling (Figure 6).

Check and clean element at least every 100 hours.
Loosen wing nut to remove. Clean by tapping base
lightly on a flat surface. Replace elementat least every
200 operating hours; clean or replace more often in
dusty conditions. See Figure 7.

COOLING SYSTEM

The generator set is cooled by a flywheel blower tan
which pulls air over the cylinders and cooling fins.
The air path is directed by sheet metal shrouds and
plates. These shrouds and plates must always be
installed properly so unit does not overheatCheck and clean (rf necessary) the cooling lins at
least every 200 hours ol operation. Remove any_Check
dust,
dirt or oil which may have accumulated.
compartment air inlet and generator set air ou et for
buildup of dirt, chaff, etc.
FIGURE

AIB CLEANEN ELEMEN1

the engine stops to help drain the carburetor

SPARK PLUGS

comPletely.

Replace spark plugs every 100 hours orat least once a

year. A badly leaded plug will cause misfiring. poor
operation or stopping when a load is applied.
. Black deposits indicate a rich mixture.
. wet plug indicates misfiring.
. Badlyorf requently louled plug indicatesthe need
tor a major tune-up.

Each time the spark plugs are removed, Inspect, clean
and regap (Figure 8). lf the plug looks discolored or
has fouled, replace it.

i:?';'i""

l;;'i

::':1",
;,1 J:" T.
Replace drain plug and relill. Atlach a warning

"i"ii,I,,'

I at

tag -

stating type and viscosity of oil used.
Remove spark plugs. Pour 1 ounce of rust in_
hibitor oil (or SAE #'10) into each cylinder. {Spray
cans work well for lhis applicalion). Turn engine
over by hand at least 2 complete revolutions.
Replace the spark plugs.
5. Replace the air cleaner at least on an annual
basis.

Plug the exhaust outlet to prevent entrance of
moisture, dirt, bugs, etc.
7. Clean and oilallexposed engine parts including
carburetor and governor linkage.
L Wipe generator brushes, slip rings, housing, etc.
Do not apply any lubricant or preservative.
9. Bemove the battery and store in a cooldry place.
Coat the battery terminals and cable connections
vrith vasolrne or grease lo prevent any corrosion.
Recharge the battery at least monthly or maintain
with a trickle type battery charger.
10. Provide a suitable cover il the unii is exposed to
6.

the elements.
FIGURE

CHEC(ING SPAFK PLUG GAP

GOVERNOR LINKAGE

The linkage must be able to move freely through its
entire travel. Every 50 hours of operation, clean the
ioints and lubricate as shown in Figure L Also inspect
the linkage for binding, excessive slack and wear.

RETURNING THE UNIT TO SERVICE
I Remove the cover and all prolective wrapping.
Wipe the oil film off all exposed engine parts.

Remove the plug ,rom the exhaust outlet.
2. Visually inspect the unitforany damage. Check to
be sure the carburetor and governor linkage are
free. Bemove the generator end bell band and
check to be sure the brushes work lreely in their
holders.
3. Check the tag to ensure oil of the proper brand
and grade has been installed. Check the oil level.
lnstall the battery (be sure battery is fully charg-

ed), observing proper polarity. Ground

negative.

spark plugs, clean and gap. Turn the
engine overby hand several times. Reinstall spark
plugs.
6. Turn on luel, disconnect electric fuel pump lead
and electric fuel solenoid shuFofl lead if unit is so
eqoipped. Jumpea the fuel pump and eleclric fuel
solenoid shut-off leads to the battery to primethe
5. Bemove

KEEP COVERNOR

AND LUBRICATE W TH
FIGUFE

LINKA6E LUBRICATEO
WiTH GRAPHITE

GOVEFNOF LINKAGE

OUT-OF.SERVICE PROTECTION

Prolect a generator set that will be oul of service lor
more than 30 days trom damage caused by rust or
corrosion. Use the following procedure to properly
protect the set.
1. Run the generatorsetwith at leasta 50% load until
thoroughly warm (usually about'1 hour).
2. Turn off fuel supply and allow the engine to run
out of fuel. Also operate the choke manually as

unit. Reconnect the leads.
7. Remove all load and start the generalor set at the
unit. lnitial stan may be slow due to oil or rust
inhibitor in the cylinders. Excessive smoke and
rough operation will occur until the oil or rust
inhibitor is burned olf.
Apply a 500/0 load after the set runs smooth. Allow
the generalor set to warm up (1 hour) with the
load connected. Check speed and voltage.
L Unit is now ready tor service.

_
Iqt

GENERATOR MAINTENANCE

The qeneralor normailv needs little careotherlhan a
perio.-oic check ot th; brushes, commutator and
;ollector rings. lf a major repair job on the generator

should become necessary, have the equipment
checked by a competent eieclrician who isthorough-

ly familiar with the operation of electric generator

equipment.

Brush Replacement
lnstall new brushes when the old ones are worn to the
dimensions shown in Figure 10. Remove the end bell
band to expose the brush holders. Remove the three
screws holding each brush holder in place (Figure
10). Remove the old brushes and clean the holders so
the new brushes can move easily in their holders.
lnstall the new brushes in the same manner as theold
ones. Always use the correct brush as listed in the
PARTS CATALOG. Never substitute a brush which
may appear to be the same for it may have different
characteristics. New brushes are shaped lo fit and
seldom need sanding to seat properly. It some brush
sparking occurs after replacing brushes, run th'e set
under a light load until the brushes wear to a good
seat,

Collector rings acquire a glossy brown finish in
normal operation. Do not attempt to maintain a bright
newly machined appearing surface. Ordinary clean-

ing with a dry, lint lree cloth is usually sufficient. Very
fine sandpaper (#200) may be used to remove stight
roughness.

ASSEMBLY TORQUES

TORQUE
Cover

BOLT
Gearcase

Cylinder Head Slud Nuts (Cold). .... ... ..
Rear Bearing Plate Screws .. . ... .... ... ..
Connecting Rod Bolt ... .. . ... .. ,... ... ..
Flywheel Cap Screw.
Other 5/16" Cylinder Block
Stud and Nuts...... .
Oil Base Mounting Screws .. .. ... .. . ...
[4anifold l\,,lountin; Scrers . . . . . . . . . . . . . . .

FT..LB.
8-10
17-19
25-28
27-29

35-40
8-10
18-23
18-23
7-9

Exhaust [,,lanifold

'18-23

EXHAUST SPARK ARRESTER
Erhaust spark arreslers are necessary tor

SAFE

EASURE FiOfl IOP FTCE Of
Btusfl rL0c( I0 T0P 0t 8nusfi
AE
s.9
5 tB"

OPERATION. All require periodic clean-out (every 50

to 100 operating hours) to maintain maximum efficiency. Some state and lederal parks require them.

To clean spark arrester remove pipe plug in bottom ol
muffler. Run set under load for 5 minutes. Replace
plug.

1 1/16
FIGUFE 10. BFTISH LENCTH

PERIODIC MAINTENANCE SCHEDULE
the cond tion of the crankcase oil, the fillers eic

Regularly scheduled mainlenance is lhe key lo lower
operating costs and longer servlce life lor the unit.
The following schedule can be used as a guide.
However, actual operating conditions under which a

irequent y until lhe proper service time periods can be
established.
For any abnormalities in operation, unusual noises
power,
overheating, etc., contact your nearest aulhorized
Onan dealer.

unit rs run should be the determining factor in
establishing a ma ntenance schedule. When

from engrne or accessories, loss of

operating in very dusty or dirty conditions, some of
lhe service periods may have to be reduced. Check

Arway. alrow generaror ser ro coot ort
belo.e perlorfrhg .ny n.lnlen.nce or
inslallaiion work on lhele|, Working on a hoi Bel colld calse

wArNtN;-|

AFTER EACH CYCLE OF INDICATED HOURS

SERVICE THESE ITEMS

General inspectron
Check Oil Level
Check Batlery Electrolyte Level
Change Crankcase Oil
Check Air Cleaner
Check Spark Plugs
Check Breaker Points
Change Oil Filter
Clean Cooling Fins
Replace Breaker Points
Clean Crankcase Breather
Replace Arr Cleaner
Remove Carbon Deposits from Heads
Adiust Tappets
Replace Fuel Filter
Clean Carburetor
Check Generator B.ushes (Replace il Necessary)

100

200

400

x2
x2
x4
X3

x2
x2
x4
x2
x2
X
X

X4
X

As Required

x1 - wirh ser r!nnrnq. vrs!a ly and audibly check exhausl sylem tor leaks
X2 - Pedorm more oflen n exlremely dusly condrlions
X3

Yr'

qep a' p

_.ces(drt

qpo'dce 'la.1ual y o'

or io $orage

All erhault lvltom connection! IIUST be checked regularly fo. any leeks and
tlghtened aa;ece!3a.y. Do NOTterminate erhau3t pipe underYehicle or neat any
window or dooiopenings. tnlpect the yapor tight 3ealr around all openings made in lhe-3et'5
compartment for wiring; conduitr etc,, to Prevent entrance of any noxioua fumes to motor home

;^Dxrr6t
lryl

inlerior.

ADJUSTMENTS
Salislactory gonerator s€t performance depends on
correct adjustments. lf trouble develops, tollow an
orderly procedure to determine the cause betore
making changes in adjustments. Refer to ENG/NE
TROUBLESHOOTING and PERIODIC SERVICE
GUIDES for additional h6lp.

CARBURETOR
The NH "RV" gen€rator set carburotor has two
mixture adiustmenls, an idle mixture which aftects
operation mainly at no load and a main (power)
adiustment which affects operation at maximum load

(Figure 11).

lf your generutor set has a "hunting"

(sudden surges and drops in speed) condition at no

load or lull load and cannot be corrected by carburetor adjustm€nts, check governor, linkage and
adfustment (see Govehot Adiustmerts). A hunting
condition at no load can usually be corrected by an
idle mixture adjustment.

lu.l mlrlure .€ttlng.,
n.vlr lorc. lh. tu.l mlllult dlurtn.nl
n.dl.. !g.ln.l th.k...t (d.m.g.! th. ..d..nd n..dl.r).
When del.inlnlng

FIGURE 11, CABEURETOR FUEL MIXTIJFE ADJUSTIIIENTS

THROTTLE STOP SCREW
The throttle stop scr6w is located on the base of lhe
carburetor (opposite side frcm main power adjustment needle) near the cGnkcase breather valve. lt
must be adjusted to obtain 56hertzatno load with the
throttle closed as far as possibl€ (throttle shaft lever
touching adjustment screw). See Figur€ 12.

CARBURETOR ADJUSTMENTS

Start generator sel and allow it to warm up for at leasl
'10 minutes before making any adiustments. Remove
all AC loads and connect a plug-in-typeAC voltmetor
into one of the receptacles in the coach. When
procedure below callsforfull load, turn on appliances

or use an onan load test panel. The first

ADJUST THIS DISTANCE
BY ADIUSTING LENGTH
OF GOVERNOR CONTROL

two

adjustments are made with the set not running. Turn

unit off-proceed as followsl
1. Turn idle mixture screw out (counterclockwise)
1/2lo 3/4lwn from seated position.
2. Turn main mixture screw 1-1l4 to 1-1l2 turns out
(counterclockwise) f rom seated position.
3. Start set and adjust governor sp ng setting so
engine speed is 1860 RPM at no load (62 hertz or
130 volts).
Hold back governorarm sothatthrottle lever Gsts
on throttle stop screw. Adiust idle stop screw to
1500 RPM (50 hertz or 100 volts). Reloase gover5.

Adiust idle mixture screw to highost RPN.4 or
voltage. Readjust governor spring setting so
engine speed is 1860 RPN4 at no load (62 hertz or

Apply full Ioad to generator and adiust main

iust governor spring setting so engine speed is
1770 RPM at full load (59 hertz or'1'10 volts).
Remove and add load sevemltimesto checkfora
governor hunting condition. Readjust governor
spring setting if required.

130 volts).

mixture screw lo highest RPIVI or voltage. Read-

cLcEo PostTtoN
FIGUFE 12. THFOTTLE STOP SCFEW SETTING

CARBURETOR FLOAT ADJUSTMENT
Normal operation seldom requires any adjustment of the float level. Disconnecl throttle control, choke leads, air cleaner inlet hose and tuel
line from carburetor.
2. Remove the tour bolts that hold the intake
manilold assembly in place and remove lhe.
complete carburetor and intake manifold
assembly as one unil. Then remove carburelor
lrom intake manifold lor easier handling wheo
checking float level.
1.

four phillips head screws on the top
lift it ofi.
4. lnvert the carburetor and check lhe lloat seiling
(see Figure l3). Thetloat should havea 0.0710.02
lnch (1.8 1 0.5 mm) clearance from the machined
mating surface (without gasket). Bend the float
tab as required.
5. lf it is necessaryto reset thefloat level,loos€nthe
scrcw nearfloatvalveaxle (pin) and bend thelloat
arm near float valve axle (pin) to posiiion tloat
flush with top edge ol carburetor float bowl. See
Figure 13.
It llolt ..l,u.lddt l. n.c.trrry, b.
c.rdul nol lo lo|e llr. buoy&cy rprlnt
or th. hn.lon lDrinq on th€ vlion llp llo.t n..dl€ md ..d

A binding in the bearings of the govemor shaft, in the
ball ,oinl, or rn the carburetor throttle assembly will

3. Remove the

ot the carburetor and

6. Reassemble

::;d:":":1':""?""$T"Ti,",jiruii'iJff

':#",ffi?o

adjuslmenl may also cause hunting. Springs of all
kinds have a tendency to lose their calibrated tension
through latigue alter long usage. lf all governor and
carburetor adjustments are properly made, and the
governor action is still erratic, replacing the spring
with a new one and reselting the adiustments will
usually correct the trouble.
1. Adjust the carburetor idle needle with no load
connected,
2

carburelor and reinstall carburetor

on intake manilold assembly and then replace

Adjust the carburetor main jet for the best luel
mixture while operating the set with a full €ted
load connected.
Adjust the length of the governor linkage and
check linkage and throltle shaft for binding or
excessive looseness,

complete assembly on the engine.
7. Check carburetor for prop€r operation.

4. Adjust the governor spring tension for rated
speed at no load operation.
5. Adjust the governor sensitivity.
6. Recheck the speed adiustment.
7. Set lhe carburctor throttle stop screw.

NEEOLE

Link.g€: The engine starts at wide op€n throtlle. The
length of the linkage connecting thegovernorarm to
the throttle shaft assembly isadiusted by rotaling th€
ball loint. Adlust this length so that with the engine
stopp€d and tension on thegovernorspring, the stop
on the throttle shaft assembly almost touches the
throttle gtop screw housing on sideot calburetor (one
more turn of govemo. ball joint would allow throttle
shaft linkag€ to rest against stop screw housing) See
Figure 12.

007!0 02 tN.
(1 8i 0.5 mm)

BOOY

FIGUAE 13. CARBURETOR FLOAT SETTING

Speed Adtustment With the warmed-up unit
operaling at no load, adjust the tension ol the

GOVERNOR ADJUSTMENTS
qovemor

governor spring. Refer to the Voltage Chart and the
Speed Chart. Turn the speed adjusting nutto obtain a
voltage and speed reading within the limits shown.

Before making governor adjustments, run the unit
about 15 minutes under,ight
to reach normal
operating temperature. (11 governor
'oad is completelyout
of adiustment, make a preliminary adjustment at no
load to first attain a sale voltage operating range).

Sensitivity Adiustment: Refer to the GovernorAdiustment illustration, and to the Voltage and Speed
Charts. Check the voltage and speed, first with no
load connected and again with a full load. Adiustthe
sensitivity to give the closest regulation (least speed
and voltagedifference between no load and tull load)

It carburelor and lh. tollowing gorerno.adjutheni. h.vealt6.dy
b€en mad€ and lhe govornor acilon b stlll e rtlc, replace the

.pri.s (Fisurc 14) wlth a new one .nd reldju.i the
gov.nor. spdngs lo8e theh c.libEr.d teBion lhrough l.llgue

without causing a hunting condition.

Engine speed determines the output voltage and
cuffent trequency olthe generator. By increasingthe
engrne speed, generator voltage and frequency are
increased, and by decreasing the engine speod,
generator voltage and frequency are decreased. An
accurate voltmeter or frequency meter (preferably
both) should be connected to the generator output in
order to correctly adjust the governor. A small speed
drop not noticeable without instruments will result in
an obiectionable voltage drop. The engine speod can
be checked with a tachometer.

To increase sensitivity (closer rcgulation), shift the
spring toward the governor shaft.

t20 YoL.'

VOLTAGE CHART
FOR CHECl(IIIG
GOVERNOR FEGULA'ION

PHASE

2 rraE

'---l------ -Et

I32
r08

FULL-LOAO VOLIACE
SPFIING TENSION

SPEED CHART FOR CHECKING
GOVEFNOR RECUIATIOT{
MAX]MUTI NO LOAD SPE€D (RPM)

HERTZ ICURRENT FREQIIENCY)

MINIMUI1 FULL.LOAO SPEED (RPM)

FIGt'RE 14, GOVERNOR ADJUSIMENTS

ELECTRIC CHOKE

ll extremes in starting temperatures require a readiustment of the choke, loosen slightly the two cover
retaining screws- See Figure 15. For less choking
action, turn the cover assembly a few degrees in a
clockwise direction. For more choking action, turn
counterclockwise. Fletighlen the cover screws.
Choke may be closed manually if desired to adjust
choke settings or for troubleshooting purposes.

2. To set the point gap turn the engine crankshaft
with rotation until the maximum breaker point
gap is obtained.

3. Using

an allen head wrench, adjust set screw (B)
for.016 (0 41 mm). Ivleasure point gap with a ftat
thickness gauge.

the engine sl..ls and runs roughty .tier a mtnute o. lwo ot
operalion, lh€ choke is set too rlch. tl th. ongi.. 3ians, and
a3suming lhatJuel, ignilion and compre$ion are.dequ.te bullhe
engine spuneB or stoF belorc ii wams Ltp, the choko is s6t roo

Mak€ sure

lelergauEe l! clean

dirt. See Fiquro

dnd

lFe ot anygrca*, oll or

16.

The timing is adjusted during initiat engine
assembly and is fixed by the point gap adjustment. No other adiustment or alignment is
necessary. A.016 point gap is equivalent to
approximately 20o BTC.

4. Beplace point box cover.
The ignltion adiushenrs 3houtd bem.dewirh rheengineina
slallc condirion and cold,
AVERAGE CHOKE SETTING

AMB ENT TEMP
58 (14
66 (19
12 (22
76 124
e2 ea

IFA

CHOhE OPENING

c
c

c
c
c

FIGURE 15. CHOKE AOJUSTMENT

BREAKER POINTS AND IGNITION TIMING
The correct point gap setting is .016 cold (0.41 mm)
and should be adjusted as follows:

1. Remove cover by loosening screw and lift off.

FTGURE 16.

IOP AOJUST FO$aTS

CONTROL TROUBLESHOOTING
PROBABLE CAUSE

PROBLEM

Bad Batlery Con.ectron

BEMEDY
' a ed dno thl.. al b"rrerv d^d (dbla ron .Llro )
2A Check specric qravrly Fecharge or rep ace baltery i

Fauxy Srarr 5ole.o,d (Kl)

Feverse curenl drode {CFr )may be shorted or open ca!sr.9
a d.a n on lhe banery B2 may be open

34. Check lor Ballery Voltage at Kl l termrnal
38 pushslarlswrlch Checkslarlsoenod Sl lermrna vollagelo
qround when barlery vo laqe al stan solenord B_ term nalrs
presenr barrery volrage sho! dasoappearal

.oi

rF. a.e qran so eno d

$rlch (i3

lermLnal rl

Faulty Starl Swrich

4. Jeunpq

Bad Balrery Conneclron

See 1 above(FATLSTOCFANK)

2
1

See 2 above {FAILS TO CFANK)

Fue so eno d mlsl open dur nq cranking and r!nn ng check
by removrng steel ne lrom carburelor and crank eng .e ll
lue soreno'drsopen.luelwl pulsaleoulollhrslrne lLtdoes
nol rhe iuel solenord and llel p!mp musl be checked
separately lo deierm ne deleclrve part

CRANKS BUT

Fauliy FuelSolenord Or

termrnal) lo ground rf so enoid enerqEes,

Feprace luse (F2) on control

tarer moders. tuet

solenoid is an inlegr.l part

wArNtN;l

lJie erlreme cate lorlh,s 16r Dit.crluel
llow rnlo . suil.ble conlai.er .nd Frke

sure are, is well venlllaled

prevenl accumulation ol

Che.k to see pornrs open a.d closedunnq crankrng llhey
't c ose. adlusi and sel pornls Prug and pl!9
do not open and
wrres musr be rn qood condrlron voltage al rgn I on corl
negar ve termrnal(-)musl a lernaleJrom ' l2volrslozerovolls
as pornls open and close d!nng engrne cranki.9

,1 W'lh eng.e nol

runn.q

check choke vane movemenl by

plsh n9 choke lever arm chokemoslbe nclosedposlon
w lh co d e.g .e and mlsl be free lo move aga nsl b'metal

sp nq Aseng newarmsup b -melalspnngre axesa.da lows
choke vane lo ope. luly The lever w'lpulsale as e.gr.e
warms up See ADJUSTMENT secl o.

Fau

ly Cra.k qn,l on Be ay (K2)

Checkvollagelromreaylermnar 4 logro!ndwhlecrankrng
un I Ballery vollage should appear al lh s term nal ll nol
check Jor vo lage al relay lerm.als r a.d 2 ll ballery
vorlage s presenl al lerm'nals I a.d 2. but nol al4. replace

reay linolvolageappearsatlermL.asland2onrelaywhile
cra.k.g check wL.ng belween starl sole.od (K1)andcrank

UNII STARTS.

BIJT

STOPS IMMEDIATELY
AFIER FELEASING
STAFT SWITCH S1

1 Fes stor Fr may be ope.
2 Fu. lqn('on Felay K3

53 Low or presslre sw 1ch may be

2
3
4

Check vorlage on bolh srdes oJ R1 W lrr sel runnrng vo iage
shou d be 24 32 vo ts OC
Check vo laqe on bolh s des ol K3 Sholld be 12 vo ls
Check o I leve I row or empty. rijl rl to proper leve
Check 53 Swrlch shoud close wlh sel rlnnrng al 10 bs

mrnmufrolpressure

IJNITS FUNSTHEN

Check

UN TS RUNS BI-IT
SURGES

See 4 above (CRANKS BUT WON.T STAFTI

See 3 above (CRANKS BUT wON

UNiTS STOPS

BEMOTE BUNNING T]ME
METER OF GENERATOR
LAMP INOPERATIVE

reve. li low or empty reliil to proper level

Governor Nol Adlusled Properly

, c-a{ i '. -l li os o enpty.
I Fep ace F1 iuse on co.lrol

'efi

START)

l lo p oper lFvel

6ll-1146

1rI

.*f ;

- --l

12ot,2a I t2o/zev..e

;is[i#
... ... Control Assembty
. . . ... Deluxe Remote Control
A3 .. .. . . ... Standard Remote Control
BT1 . ... .. ..12 Volt Battery
CB1 ... .. .. Circuit Breaker
CB2 ... .. .. Circuit Breaker
A1 . ..
A2 . ..

E4 .. ... .. . . Electric Fuel Pump
F1, F2.. .... Fuse (s-amp, 32 volt)
G1

K1
K2
K3

(when used)

.. ... .... Generator
... ... ... Start Solenoid
... .. . ... Crank lgnilion Flelay
... ... ... lgnition Run Relay

R'l ... ... ... Battery Charging Resistor
(fixed value)
51 . ... . .. .. Start-Stop Switch
52 . ... . .. .. Breaker Points Assembly
53 . . ... .. .. Low Oil Pressure Switch
T1
. .... ... .lgnition Coil
-

CR1,......Fleverse Current Diode
(prevents battery discharge
when unil is shut down)
E1 ... ... ... Onan Choke
E2, E3 .. ... Spark Plugs

REMOTE ACCESSORIES
INSTALLING STANDARD OR DELUXE REMOTE START CONTROLS
300-0985 AND 300-0986

3. lnsert remole control in hole cutout and secure

The standard control includes a start-slop switch and

with woodscrews supplied with switch.

indicalor lamp. The deluxe control conlains these
items plus a running time meter and a battery
condition meter. lnstall as tollows:
1.

Seal all hole. rhal might .llow noxiou6
ga3esro enlermolor home,

Select control location. Using Figure 17 or 18 as a

guide, drill screw holes and cut hole to accommodate remote switch in dash panel.
2. Following national local electrical codes and
using #18 or larger insulated wires ol predeter-

Ensure that leads kom remole swllch

connecl walh coresponding terninals
For sers wilhoul remore conrcclo. plug, con nEl lemlnal3 I,
2, and 3lo coresponding lemlnals on qeneralor.sll6rmin.l
block. Connecl term inal ,5 (ll !s€d) lo B+ (on leminal block)
or lo battery connedlon on 3lart 3olenoid. Thb connelion
should be prorecred with 6 5 anPl$e, connecl lerminal*6lo
posilire lermhal on iqnilion coil .nd protecl with a 5 amp tuse

mined length, connect remote control lo
generator set. Ensure that leads trcm remote
control connect to corresponding terminals on
generalor set. Refer to Figure 19 for wiring
connections,

When wiring is complete, checkforproperoperation by stading and stopping set atlhe set control
and by the remote start swiich.

Do.ot route Dc wirFlorrefr oleconl.ol
lhrouqh conduil conlainlng AC loadwning. hduced volrages day cause er.nc operalion.

FIGUF€ I8. MOION HOME CUTOUT FOR

FIGURE 17, MOTOE HOIIE CUTOUT

300-0986 DELUXE CONTnOL

FOF 300.0985 STANOARD
CONI'FOI PANEL

PANEL

NOIE: Use 18 gruge or
larqe, sare lor in.l.rling lhe

{GLOWS WHEN SET
S RUNN]NG)

SET TEFMINAL

FEMOTE SwlTCH
FTJNCTION

WIRE COLOR

COD€

2
3

;;;-'l
- "i::J

FTGURE 19_ f,'tRtNG CONI{ECI|ONS FOF 30t -0985 AND 300-0906 REMOTE CONTFOLS

CALL FOR SERVICE
2315 Griffrn Road Unit #6
LEESBURG, FLORIDA 32748
(904) 325€542 (305) 331.0095
GENERATOR POWER SYSTEMS

-!
21

NOTE: U3e 18

g.!ge

larqer wire lor i.3r.Iang lhe

GENEFAIING LAMP
(GLOWS WHEN SET
]S RUNNlNG)

S€T TEFMINAL

FUNCTION

FTGURE 19. WtRIitG CONNECTTONS

FOi

300-0985 AND 300-09€6

nEMOIE CONIFOLS

CALL FOR SERVICE
2315 criffin Road Unit #6
LEESBURG. FLORIDA 3274A
(904) 326€542 (305) 331-0095
GENERATOR POWER SYSTE]IIS

Onan

Corpoblion
at

A Substdtaty

Canpany

^4cctaw-Edtsan
1400 73rd Avenue
Minneapolis, MN

N.E.
ss432

612 574-5{100
lelex 29 0476 {U,S.)
Telex 23 0856 (ouGide U.S.)

fWX 91057G2833
Cable ONAN

,|:

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File Type                       : PDF
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Create Date                     : 2010:08:02 20:10:50Z
Modify Date                     : 2010:08:02 20:10:50Z

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940 0121 Onan 6.5NH (spec P) RV Genset Operations Manual (10 1981)

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