Zenoah G380Pu Users Manual OM, Zenoah, G380PU, 2008 10, EN

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OWNER’S MANUAL

2609-93112 (811)

November 2008

•Do not modify any parts of the engine.

•This engine is designed to be used to Radio

controlled products.

•In case any modification by customer,

ZENOAH shall not bear any responsibility from

the damage caused by such modification.

•Keep ignition system well maintained.

WARNING

●この製品はラジオコントロール

飛行機用に設計されています。

●改造、組み替えされて使用され

た場合当社は一切の責任を負い

ません。

●特に電装品は常に点検、整備し

てご使用ください。

警 告

MODEL: G380PU

G380PU-1

•This engine is designed for the model aircraft use.

ZENOAH assumes no responsibility for those engines that are modified or used for

any other applications.

•This Manual describes the engine part only. For its mounting to the aircraft and its

control, see instructions described in the manual of the aircraft.

•Check the propeller every time before starting the engine, and replace it with a new

one if it is damaged.

•When the propeller hits something in operation, immediately stop the engine and

check it.

•Check the flywheel, and replace it with a new one if it is damaged.

•Never modify the flywheel.

•Use the ZENOAH genuine parts for replacement.

•When the vibration is abnormal, stop the engine and check the entire unit for

possible damage or loose fasteners.

•Mixing the gas and 2-cycle engine oil and filling it up are to be done in a well-

ventilated place.

•Never run the engine in a place of poor ventilation, as exhaust fumes contain

harmful carbon monoxide.

Mix unleaded gasoline and 2-stroke oil in the ratio of 25 ~ 40:1.

[ NOTE ]

1. Be sure to use a gasoline-resistant fuel piping. (Do not use any silicon rubber tube).

2. Never use any alcohol fuel or alcohol-added fuel, or the rubber part in the carburetor will

be damaged.

Starting Engine

1. Fill the fuel and fix to the aircraft body firmly.

2. Close the choke and set the throttle to one third open.

[ NOTE ]

If the choke is closed too much, it may dampen the spark

plug and it may cause starting failure.

3. Turn the propeller slowly counterclockwise until it is

resisted, and then powerfully. When turning it

manually,use all the fingers except the thumb.Turn it

at proper intervals.

3. Operation

2. Fuel

1. Safety Precautions

2

BLACK LEAD

KILL

SWITCH

ENGINE

BODY

EARTH

4. When engine first fires, open the choke and turn the propeller again in the same manner.

5. When the engine is started,warm it up for 2 to 3 minutes at low speed.

Stopping Engine

Ground the black wire from the source coil to the engine, and the engine will stop.

The carburetor comes with a standard setting.

This setting is for optimum performance under the barometric pressure and climactic

conditions at the factory.

Therefore, the carburetor should be readjusted wIth a load applied (with the propeller

mounted) after the engine having been warmed up.

[ NOTE ]

1. Adjustment standards :

2. IDLE SCREW - Turn clockwise to increase the idling rpm.

3. LOW SPEED NEEDLE - This needle controls fuel flow in the low rpm range.Turning

clockwise makes the fuel lean. Turning counterclockwise makes the fuel rich.

4. HIGH SPEED NEEDLE - This needle controls fuel flow in the high rpm range. Turning

clockwise makes the fuel lean and the reverse makes it rich. Set the needle 1/4 turns

open from a position where the peak rpm is obtained on the ground.

5. Do not overtighten the needles.

6. Warm up the engine before adjusting the carburetor.

7. Make sure to stop the engine while adjusting the carburetor.

4. Carburetor Adjustment

3

LOW SPEED NEEDLE : 1 ± 1/4turns open

HIGH SPEED NEEDLE : 11/2±1/4turns open

4

•Check if screws and bolts are firmly tightened.

•Check if there is any fuel leakage.

•Check if there is any damage (crack or deformation).

•Check if the fuel line is clogged.

•Check if the spark plug and the muffler are contaminated.

WARNING !

When the engine is not in use, take great care in casually flipping the prop as you might do

in checking compression or for adequate lubrication in engine. These ignition engines will fire

and start with just one weak flip. Broken arms have already resulted from just such an

unexpected experience.

5. Daily Inspection

1. Crankcase fixing bolt 14 50 ~ 80 kg-cm, 3.6 ~ 5.8 ft-lbs.

2. Flywheel fixing hub nut 30 150 ~ 190 kg-cm, 10.8 ~ 13.7 ft-lbs.

3. Muffler fixing bolt 12 40 ~ 50 kg-cm, 2.9 ~ 3.6 ft-lbs.

4. Ignition module fixing screw 43 20 ~ 25 kg-cm, 1.4 ~ 1.8 ft-lbs.

5. Insulator fixing screw 4 30 ~ 40 kg-cm, 2.2 ~ 2.9 ft-lbs.

6. Carburetor fixing screw 45 30 ~ 40 kg-cm, 2.2 ~ 2.9 ft-lbs.

7. Mount plate fixing screw 47 30 ~ 40 kg-cm, 2.2 ~ 2.9 ft-lbs.

8. Spark plug 42 150 ~ 180 kg-cm, 10.8 ~ 13.0 ft-lbs.

Applicable positions

and Part Names Tightening Torque

Illustration

index No.

Table of Tightening Torque

5

6. Specifications

Model .......................................................G380PU · G380PU-1

Type .........................................................Single cylinder gasoline engine, 2-stroke air cooled

Displacement............................................37.4cc (2.28cu. in.)

Bore x Stroke............................................38mm x 33mm (1.496 in. x 1.299 in.)

Compression ratio ....................................6.8 : 1

Fuel...........................................................Gasoline mix

(mixture ratio gasoline to 2-stroke oil : 25 ~ 40 : 1)

Carburetor ................................................WALBRO WT338

Ignition .....................................................Flywheel magneto (contact-less type)

Spark plug ................................................CHAMPION RCJ7Y

Service engine speed...............................7000 ~ 9000rpm

Allowable engine speed (instantaneous)

........12000rpm

sizes (L x W x H) ......................................170 x 130 x 215mm (6.30 x 5.12 x 8.46 in.)

(Length covers as far as the end of the hub nut.)

Weight ......................................................2.0kg (4.4 lbs)

Specifications are subject to change without notice.

6

7. Parts List G380PU, G380PU-1

46 2630-81120 • Cover 1

47 3310-81130 • Screw 1

48 3304-81140 • Gasket 1

49 1172-81150 • Diaphragm 1

50 3356-81310 • Valve 1

51 2850-81290 • Gasket 1

52 3310-81260 • Diaphragm 1

53 3310-81280 • Cover 1

54 2670-81270 • Spring 1

55 3310-81240 • Screw 1

56 3310-81250 • Pin 1

57 3310-81230 • Lever 1

58 1480-81420 • Plug 1

59 3350-81380 • Spring 1

60 2630-81330 • Screw 1

61 2670-81410 • Spring 1

62 2609-81370 • Shaft 1

63 2880-81470 • Screw 2

64 3356-81340 • Valve 1

65 1148-81390 • Ring 1

66 1491-81160 • Spring 1

67 2609-81170 • Needle 1

68 3080-81320 • Spring 1

69 2609-81330 • Needle 1

70 3310-81351 • Screw 4

71 2813-81460 • Shaft 1

72 2670-81450 • Valve 1

73 3350-81220 • Ball 1

74 3350-81350 • Spring 1

75 T2100-06020 • Gasket kit 1

76 0260-10540 Screw 2

77 3378-85111 Mount 1

78 3310-31720 Screw 4

Q' ty

/unit

DescriptionParts No.

Index

No.

7

13378-12111 Cylinder 1

23330-14111 Insulator 1

33330-14121 Gasket 1

40260-20520 Screw 2

53330-14132 Gasket 1

62609-15001 Muffler assy 1

11 2841-15210 Gasket 1

12 3330-15220 Bolt 2

13 3378-21110 Crankcase 1

14 01252-30540 Bolt 4

15 0292-20510 Washer 4

16 3120-13510 Plug 1

17 3130-13520 Gasket 1

18 3340-41113 Piston 1

19 3340-41211 Ring 1

20 3304-41310 Pin 1

21 3310-41320 Ring (Circlip) 2

22 1650-41510 Washer 2

23 3310-41410 Bearing 1

24 3378-42000 Crankshaft comp. 1

25 06030-06201 Bearing 2

26 1650-21220 Seal 1

27 04065-03212 Ring 1

28 2169-21210 Seal 1

29 1260-43240 Key 1

30 1140-43231 Nut 1

31 0290-20820 Washer 1

32 01641-20812 Washer 1

33 2609-51110 Hub 1

34 3544-11510 Bolt 2

35 1145-43290 Washer 1

36 2609-51411 Bolt 1

37 3378-71110 Module 1

38 2609-71210 Rotor 1

39 1260-71261 Spacer 3

40 1400-72111 Cap 1

41 1400-72121 Spring 1

42 3699-90032-10 Spark plug 1

43 3310-72150 Bolt 3

44 2609-81000 Carburetor assy (WT338) 1

45 3306-81380 • Screen 1

Q' ty

/unit

DescriptionParts No.

Index

No.



for G380PU



G380PU, G380PU-1

●Scope of Application

This warranty applies only to the engines and parts manufactured by ZENOAH and sold

directly or through distributors.

●Limit of Warranty

This warranty shall apply only to trouble resulting from material defects and inferior

assemblies that ZENOAH acknowledges.

●Method and Limit of Compensation

1) Repair or replacement through the distributor, etc.

2) ZENOAH and its distributors shall not provide compensation for incidental loss to

engine purchasers resulting from trouble.

●Term of Warranty

The term of warranty shall be three (3) months from the date of purchase, within one year

from the date of manufacture.

●The warranty shall not cover the following, even if occurring during the term of

warranty:

1) Any faults, failures caused from neglect of this OWNER'S MANUAL for proper

operation and maintenance.

2) Dismantled or modified engines and parts.

3) Expendable parts.

4) Trouble resulting from submersion in water, from fire or from other natural disasters

and calamities.

5) Engines installed with parts that are not genuine.

8. Warranty

Printed in Japan

Head Office : 1-9 Minamidai, Kawagoe-city, Saitama, 350-1165 Japan

Phone: (+81)49-243-1115 Fax: (+81)49-243-7197