Floscan Instrument Single Engine Fuel Meter 5510 20B 1 Users Manual

2015-02-09

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FL SCAN
INSTRUMENT CO, INC.

2004 EDITION

Run Without Fear of
Empty Fuel Tanks
Adventure without misadventure
How many times have you hesitated to try new fishing grounds or stay out longer
because you couldn’t trust your fuel level gauges? Introducing a remarkable tool that
will give you greater range with less fuel. Plus, it pays for itself: A Fuel Monitoring
System from FloScan.

High Performance
Fuel Flow Sensors
The Foundation of FloScan's Technical Success
For over 30 years FloScan's fuel flow sensors have outperformed all
others for marine gasoline and diesel engines from 25 to 4300 HP. No
other fuel flow sensor design can match FloScan’s (+/-) 1/4% repeatability
over a 100/1 flow range. For example, FloScan provides exceptional
accuracy from fuel flows down to 0.5 GPH (idling/troll speeds) to flow
rates up to 50 GPH (full throttle). Sapphire jewel bearings in FloScan
sensors give infinite life and guarantee unwavering accuracy. Low cost
steel bearings in competitive flow sensors wear so that acccuracy falls.
Only FloScan fuel flow sensors have been accepted by the automobile
and heavy duty truck manufacturers for installation in new vehicles.
FloScan has supplied all the flow sensor needs of general aviation aircraft
during the past 25 years with a perfect safety record. FloScan fuel flow
technology sets the standard.

FloScan Shows Exact Fuel Use
FloScan shows exactly how much fuel you’ve used and how fast you’re using it. Rather
than trying to measure what’s sloshing around in your tanks, FloScan’s electronic
sensors measure fuel flow right at your engine. And the computerized meter indicates
precise consumption totals. There’s no guesswork. Unlike fluctuating fuel tank float
gauges, you receive immediate, accurate data. No matter how rough the seas, no
matter how many tanks or engines in your boat.
For Less Than the Cost of a Tow
FloScan pays for itself in fuel savings alone. You can easily set your boat’s most
efficient speed by watching your FloScan to see how GPH varies at different speeds
and running conditions. Most skippers can save 10% to 30% on their fuel bill, usually
paying for their system in just a few seasons. Something else to consider: FloScan
costs less than a typical tow if you run out of fuel.

SPEED VS. FUEL ECONOMY
Engine Speed
2200 RPM

Engine Speed
3400 RPM

Boat Speed
14 knots

Fuel Consumption
16 GPH

At 2200 RPM, boat speed is 14 knots.
The FloScan is showing fuel
consumption at 16 GPH.
Current fuel efficiency is 0.88 nMPG.

Engine Speed
2800 RPM

Boat Speed
24 knots

Fuel Consumption
31 GPH

At 3400 RPM, boat speed is 24 knots
and fuel consumption is 31 GPH.
Current fuel efficiency is 0.77 nMPG.

FL SCAN
INSTRUMENT CO, INC.

Boat Speed
21 knots

Fuel Consumption
19 GPH

At 2800 RPM, boat speed is 21 knots
and fuel consumption is 19 GPH.
Current fuel efficiency is 1.10 nMPG.
With FloScan, you’ll be able to pinpoint
the engine speed that will cover the
most ground with the least amount of
fuel consumed.

Don’t Leave The Dock Without It
Monitors Your Engines Heartbeat
FloScan serves as a watchdog on engine performance. For example, if
your GPH increases from what you’ve already determined to be an efficient
operating level, you’ll know something’s amiss... a nicked prop, fouled
hull, clogged injector, engine problem, etc. Even something as simple
as a defective spark plug can up your fuel consumption by 20% - 40%,
with no noticeable change in engine operation.

GPH

D
PEAK
E
E
EFFICIENCY
P
S

Peak Fuel Efficiency
Accurate fuel consumption and boat speed data allow you to determine
peak fuel efficiency. As shown in the opposite diagram, peak fuel efficiency
changes constantly according to sea conditions, boat characteristic, trim
tab setting, and weight load/distribution. FloScan allows you to pinpoint
the engine speed that will cover the most ground with the least amount of
fuel consumed under any load or operating condition. No other piece of
marine equipment allows you to master this procedure as quickly or
effectively than FloScan.

Model Selection and Installation Tips
Gasoline Models
Gas models are the easiest to specify and install. We fit the following
engine types:
- ALL carbureted Inboard, I/O, and Outboard gas engines.
- ALL 2-stroke and 4-stroke EFI Outboard gas engines.
- ALL DFI gas O/B engines including Mercury Optimax and Evinrude
Ficht .
- ALL EFI Inboard and I/O gas engines with closed loop return fuel systems
such as Mercruiser and Volvo engines.
TM

NEW! FloScan now fits EFI Inboard and I/O engines with fuel return lines
that are connected directly to the fuel tank such as Crusader , Marine
Power , PCM , SeaMaxx and Kodiak EFI engines. Flow sensors are
installed on the feed and return fuel lines to measure the net burn rate of
the engine. See Series 5800 CruiseMaster section for more info.
TM

When selecting a gas CruiseMaster or TwinScan model, use the following
formula to determine the correct GPH scale (HP rating x 10% = maximum
GPH). Example: 200 hp x 10% = 20 GPH. Select the CruiseMaster model
with the 0-20 GPH scale or TwinScan model with 0-24 GPH scale.
Multifunction and GPS Interface Models do not require scaling since they
incorporate a digital display which reads up to 999 GPH. Make sure to
select proper flow sensor type (20B/231/233 Series) for your application.

Diesel Models
Diesel models are based on the type of fuel delivery system used and
each engine requires a dedicated FloScan system. These engines use
a variety of fuel pumps including rotary, in-line, and direct injection
systems. Flow sensor selection is based on the feed and return flow rates
associated with the engine. Flow sensors are installed on the feed and
return lines to display net flow rate and total fuel consumption. Certain
engines which use the return fuel to cool injectors will require fuel
temperature compensation to ensure accurate flow measurement. These
engines include Detroit Diesel , EMD , and CAT 3100/3500 Series
engines and are limited to the Series 7000 and 9000 Multifunction
Systems only. All models require a panel mounted SPST (ON/OFF)
switch for resetting the totalizer. Series 9000 diesel models require an
additional SPST switch for selecting GPH or nautical MPG.
TM

NEW! Easier-to-Install Series K Diesel System
The new Series K Diesel System represents a major breakthrough in
diesel fuel management. The Series K system cuts the installation time
and cost in half over previous diesel models. Separately mounted
pulsation dampers are no longer required. New flow sensor design also
enhances system performance and accuracy. Simplified procedures allow
for do-it-yourself installation. Models available for diesel engines from
25 to 4300 hp.

Flow sensors are typically installed in-line after the filter for added protection
from fuel tank debris. With certain EFI engines such as Mercruiser, the
flow sensor can only be installed before the filter. Adding a basic (coarse)
filter element before the sensor provides adequate protection.
All models require a panel mounted SPST (ON/OFF) switch for resetting
the totalizer. Series 7000 gas models require two additional SPST switches
for selecting Port or Stbd GPH and Engine Hour Time or Engine Synch.
Series 9000 gas models require a third SPST switch for selecting GPH or
nautical MPG.

FL SCAN
INSTRUMENT CO, INC.

Series K high
flow sensor

Series K Standard
Flow sensor

CruiseMaster Series

Easy to read
analog meter

The Series 5500/5600 CruiseMaster fits virtually all inboard, I/O, and outboard engines
from 50 hp - 1000 hp including EFI, TBI, and DFI engines with closed loop return
fuel systems and all carbureted engines. A system consists of Series 20B or 231 fuel
flow sensor(s) and a microprocessor based instrument which displays individual flow
rates and total fuel consumption. New Series 5800 CruiseMaster fits EFI engines
with fuel return lines that are connected directly to the fuel tank. A system consists
of two Series 231 flow sensors to measure feed and return flows and a microprocessor
based instrument which calculates and displays net flow rate and total fuel consumption.

Models
available in
0-10, 20, 32,
50 and 100
gph scales

Total fuel
consumed

The Series 6500/6600 CruiseMaster is available for most diesel engines rated from
50 hp - 2000 hp. A system consists of two Series K diesel fuel flow sensors to
measure feed and return flows and a microprocessor based instrument which calculates
and displays net flow rate and total fuel consumption

Product Specs

Series
5500/5600/5800
GAS MODELS

Series
6500/6600
DIESEL MODELS

Engine type

Fits inboard, I/O, and outboard engines rated from 25 hp to 1000 hp. Single
and twin engine models available.

Fits most diesel engines rated from 50 hp to 2000 hp. Single engine models
available only. Twin diesels require two separate FloScan systems.

System Electronics

Microprocessor based electronics with user adjustable calibration for superior
accuracy. Models available with 0-10, 20, 32, 50 and 100 GPH scales.

Microprocessor based electronics with user adjustable calibration for superior
accuracy. Models available with 0-10, 0-20, 0-32, 0-50 and 0-100 GPH scales.

Model Specs

Self contained totalizer with permanent LCD display records total fuel consumed
to 99,999 gallons. Totalizer is resettable using external SPST switch (not
supplied).

Twin engine models show the individual flow rates to each engine with an
external SPST switch (not supplied), and the totalizer records the combined
fuel consumption of both engines.

Single engine models show the flow rate of the engine. The totalizer records
the total consumption of the engine.

Meter Colors

Models available in black or white (bezel/dial).

Meter Mounting

Meter fits 3-1/16” diameter panel opening or optional deck mount.

Sensor Types

New Model 20B flow sensor recommended for carbureted and EFI inboard
and I/O engines up to 350 hp. Installs in-line between filter and fuel pump.
Also fits Mercury Optimax, Evinrude Ficht, and all 4-stroke outboard engines.
20B sensor also recommended for carbureted and EFI outboard engines rated
below 150 hp. Installs in-line between filter and priming bulb.

Model 201/231 Series K Diesel Standard Flow Sensors are designed for feed
and return flows in the range of 0.3 – 48 GPH. Standard Flow Sensors incorporate
1/4” NPT female inlet and outlet ports with 1 PSI or less pressure drop at rated
flows.

Model 231 flow sensor features extremely low flow resistance. Recommended
for carbureted and 2-stroke EFI outboards rated 150 hp and above. Installs
between filter and priming bulb. Also recommended for EFI engines with
feed and return fuel lines.
Model Numbers

Fits all carbureted Inboard and I/O’s up to 350 hp. Fits all EFI Inboard and
I/O engines (including Mercruiser and Volvo) with closed loop fuel return
systems. Fits all Mercury Optimax, Evinrude Ficht, and 4-stroke outboard
engines. Fits all carbureted and EFI outboard engines below 150 hp.
5510-20B-1
5510-20B-2
5520-20B-1
5520-20B-2
5532-20B-1
5532-20B-2

0-10 GPH
0-10 GPH
0-20 GPH
0-20 GPH
0-32 GPH
0-32 GPH

Single Engine Model
Twin Engine Model
Single Engine Model
Twin Engine Model
Single Engine Model
Twin Engine Model

0-20 GPH
0-20 GPH
0-32 GPH
0-32 GPH

Popular Models and Applications
6505-201-1K
6510-201-2K
6510-BOS-2K
6520-BOS-2K
6520-231-2K

Fits carbureted and 2-stroke EFI outboard engines from 150 to 300 hp.
5520-231-1
5520-231-2
5532-231-1
5532-231-2

Model 233/236 Series K Diesel High Flow Sensors are designed for feed and
return flows in the range of 30 – 400 GPH. High Flow Sensors incorporate 1”
NPT female inlet and outlet ports with 1 PSI or less pressure drop at rated flows.

Single Engine Model
Twin Engine Model
Single Engine Model
Twin Engine Model

6532-231-2K
6620-3CB-2K
6632-3BB-2K
6632-3CB-2K
6632-3BB-2K
6650-3DD-2K
66100-3ED-2K

*See website for complete model selections and pricing.

NEW! 5800 Series for Crusader, Marine Power, PCM, SeaMaxx and Kodiak
EFI engines with fuel return line to tank. One system required for each engine.
5820-231-2
5832-231-2

Ford Lehman Super 90/135
Yanmar 3JH/4JH2, Cummins 4BT3.9
Yanmar 4LH-DTE, Volvo 30/31/40/41, Perkins 4.236
(all engines up to 200 hp)
Yanmar 6LP-STE/STP, Perkins 6.354
Yanmar 6LY-STE, Volvo 60/61/70/71, CAT 3208
(all engines up to 400 hp)
Yanmar 6LY-STE, CAT 3208 (435 hp)
Cummins 6BT 300/315/330/370
Yanmar 6LY2-STE, Volvo 72/73/122
Cummins 6CT 420/450, Yanmar 6CX-GTE, Volvo 74P
Caterpillar 3406/3408/3412 (350-1000hp)
MAN 2840/2842/2848, MTU 8V183TE/12V183TE
MTU 12V396 TB93, Deutz TBD616 V12-V16

0-20 GPH Single Engine Model Only
0-32 GPH Single Engine Model Only

*See website for complete model selections and pricing.

FL SCAN
INSTRUMENT CO, INC.

Multifunction Series

Engine hour time

Our Multifunction Meter combines a digital LCD Engine Hour Meter, Tachometer, Fuel
Flowmeter, and Fuel Totalizer in a single 3-3/8” diameter instrument which fits the panel
space of a standard tach. Instrument also incorporates an Engine Synch Indicator (twin
gas models only). External switches are required for resetting the Fuel Totalizer and
Port/Stbd GPH selection (gas only) and Engine Hours/Engine Synch (gas only).

RPM

Total gallons
consumed

GPS Interface Series

Our GPS Interface Model provides the same functions as the Series 7000 instruments PLUS
the important addition of nautical Miles-Per-Gallon. The boat speed over ground data
required to calculate the MPG reading is obtained from a GPS with NMEA 0183 output.
The direct display of MPG over the ground gives the skipper a powerful new tool to set
optimum fuel efficiency under all conditions and to determine precisely how far he can go
with his remaining fuel.

Gallons per hour
or Nautical MPG

Series
7000/7500/7600
GAS AND DIESEL MODELS

Series
9000/9500/9600
GAS AND DIESEL MODELS

Engine type

Fits most gas and diesel engines rated from 25 hp to 4300 hp. Twin gas
models available. Twin diesels require two systems.

Fits most gas diesel engines rated from 25 hp to 4300 hp. Twin gas
models available. Twin diesels require two systems.

System Electronics

Microprocessor based electronics with 2-stage adjustable calibration of GPH
& Gallons used for superior accuracy.

Microprocessor based electronics with 2-stage adjustable calibration of
GPH & Gallons used for superior accuracy.

Model Specs

Simultaneous, independent display of Engine Hour Time, Tachometer, Fuel
Flowmeter, and Fuel Totalizer. RPM readout accurate to 1 RPM. GPH and
Totalizer readings displayed in tenths of gallon. Totalizer capacity up to 99,999
gallons. Dual color backlighting of LCD provides for easy night viewing.
External SPST switch (not supplied) required for resetting fuel totalizer reading.

Provides the same functions as Series 7000 PLUS the addition of nautical
MPG. Boat speed over ground is obtained from GPS with NMEA 0183
output. Simultaneous, independent display of Engine Hour Time,
Tachometer, Fuel Flowmeter, and Fuel Totalizer. RPM readout accurate
to 1 RPM. GPH and Totalizer readings displayed in tenths of gallon.
Totalizer capacity up to 99,999 gallons. Dual color backlighting of LCD
provides for easy night viewing. External SPST switch (not supplied)
required for resetting fuel totalizer reading.

Product Specs

Twin Gas models also incorporate an Engine Synchronizer Indicator and
Port/Stbd GPH selection. This allows you to use one meterhead to monitor
both gas engines. SPST switches required for twin gas model features.

Twin Gas models also incorporate an Engine Synchronizer Indicator and
Port/Stbd GPH selection. This allows you to use one meterhead to monitor
both engines. SPST switches required for twin gas model features.

Meter Colors

Models available in black or white (bezel/dial).

Meter Mounting

Meter fits 3-3/8” panel opening (standard tach size)

Sensor Types

Uses model 20B and 231 Series flow sensors designed for gas engines.

Model 201/231 Series K Diesel Standard Flow Sensors are designed for feed
and return flows in the range of 0.3 – 48 GPH. Standard Flow Sensors
incorporate 1/4” NPT female inlet and outlet ports with 1 PSI or less pressure
drop at rated flows.

Model 233/236 Series K Diesel High Flow Sensors are designed for feed and
return flows in the range of 30 – 400 GPH. High Flow Sensors incorporate 1” NPT
female inlet and outlet ports with 1 PSI or less pressure drop at rated flows.

Popular Gas Models

Model Number

7000-20B-1
7000-20B-2
7000-231-1
7000-231-2

50 – 350 hp
50 – 350 hp
150 – 300 hp
150 – 300 hp

Single Engine (I/B, I/O, & O/B*)
Twin Engine (I/B, I/O, & O/B*)
Single Engine (Outboard*)
Twin Engine (Outboard*)

Popular Diesel Models
750M-201-1K
750M-201-2K
750M-BOS-2K
750M-231-2K
75TM-235-2K
760M-3BB-2K
760M-3CB-2K
760M-3DD-2K
76TM-6CC-2K
76TM-6DD-2K
76TM-6FE-2K

9000-20B-1
9000-20B-2
9000-231-1
9000-231-2

50 – 350 hp
50 – 350 hp
150 – 300 hp
150 – 300 hp

Single Engine (I/B, I/O, & O/B*)
Twin Engine (I/B, I/O, & O/B*)
Single Engine (Outboard*)
Twin Engine (Outboard*)

Popular Diesel Models
Ford Lehman (all models)
Yanmar 3JH/4JH2, Cummins 4BT3.9
Volvo 30/31/40/41 Series, Yanmar 4LH-STE,
Yanmar 6LP-STE/STP, Hino (all models)
Yanmar 6LY-STE, Volvo 60/61/70/71, CAT 3208
Caterpillar 3116/3126
Yanmar 6LY2-STE, Yanmar 6CX-ETE, Volvo 72/73/74
Cummins 6BT/6CT (all models), Yanmar 6CX-GTE
MAN 2840/2842/2848, MTU 8V183TE/12V183TE
Detroit 6-71N/6V92/8V71
Detroit 6-71T/8V92
Caterpillar 3500 Series, Detroit 16V92, EMD

*See website for complete model selections and pricing.

950M-201-1K
950M-201-2K
950M-BOS-2K
950M-231-2K
95TM-235-2K
960M-3BB-2K
960M-3CB-2K
960M-3DD-2K
96TM-6CC-2K
96TM-6DD-2K
96TM-6FE-2K

Ford Lehman (all models)
Yanmar 3JH/4JH2, Cummins 4BT3.9
Volvo 30/31/40/41 Series, Yanmar 4LH-STE,
Yanmar 6LP-STE/STP, Hino (all models)
Yanmar 6LY-STE, Volvo 60/61/70/71, CAT 3208
Caterpillar 3116/3126
Yanmar 6LY2-STE, Volvo 72/73/74
Cummins 6BT/6CT (all models), Yanmar 6CX-GTE
MAN 2840/2842/2848, MTU 8V183TE/12V183TE
Detroit 6-71N/6V92/8V71
Detroit 6-71T/8V92
Caterpillar 3500 Series, Detroit 16V92, EMD

*See website for complete model selections and pricing.

FL SCAN
INSTRUMENT CO, INC.

TwinScan Tach & GPH meters
Displays GPH rate for
each engine and total
fuel consumed by both
engines.

Displays RPM rate for
each engine and Engine
Synchronization. Also
displays nautical MPG
when combined with a
TwinScan GPH meter.

Monitor your engine's performance at a glance. A TwinScan Tach and GPH
Meter are easy to install by simply replacing your existing tachs. GPH meter
displays individual burn rate for each engine and total gallons consumed.
Tachometer displays individual RPM rate for each engine and Engine
Synchronization. When combined with a TwinScan GPH meter, the Tachometer
also displays nautical Miles-Per-Gallon when connected to a GPS (NMEA
0183 data) for boat speed over ground. SPST (ON/OFF) switches required
for resetting totalizer and accessing MPG data.
Description

Dial Range

Diameter

Black Dial/
Black Bezel

White Dial/
S.S. Bezel

White Dial/
White Bezel

Tachometer / Synch Indicator / nautical MPG*
*MPG feature on gas models only - TwinScan GPH
meter required for this feature

0-3000 RPM
0-4000 RPM
0-6000 RPM
0-8000 RPM

3-3/8”
3-3/8”
3-3/8”
3-3/8”

3TB013U
3TB014U
3TB016U
3TB018U

3TS023U
3TS024U
3TS026U
3TS028U

3TW023U
3TW024U
3TW026U
3TW028U

0-16 GPH

3-3/8”

3FB016U2

3FS026U2

3FW026U2

20B Series

0-24 GPH

3-3/8”

3FB012U2

3FS022U2

3FW022U2

20B Series

0-32 GPH

3-3/8”

3FB013U2

3FS023U2

3FW023U2

20B Series

Inboards and I/O’s 351-500 hp

0-50 GPH

3-3/8”

3FB015U1

3FS025U1

3FW025U1

231 Series

Inboards over 500 hp

0-100 GPH

3-3/8”

3FB010U3

3FS020U3

3FW020U3

233 Series

Carbureted and 2-stroke EFI outboards 151-225 hp

0-24 GPH

3-3/8”

3FB012U1

3FS022U1

3FW022U1

231 Series

Carbureted and 2-stroke EFI outboards 226-300 hp

0-32 GPH

3-3/8”

3FB013U1

3FS023U1

3FW023U1

231 Series

GPH / Totalizer Models (gas only)
Inboards, outboards, and I/O’s up to 150 hp
Mercury Optimax and Evinrude Ficht up to 150 hp
All 4-stroke outboards up to 150 hp
Inboards and I/O’s 151-250 hp
Mercury Optimax and Evinrude Ficht 151-250 hp
All 4-stroke outboards 150 hp or higher
Inboards and I/O’s 251 - 350 hp

FL SCAN
INSTRUMENT CO, INC.

Sensor /
Sender
Coil, Alt., Gen., Mag.

What Owners Say
“Just wanted to let you know how well the FloScan
9000's with the series K sensors worked for me
on our 1400+ mile trip to Alaska, and the rest
of this summers boating. Having this equipment
onboard has saved us probably hundreds of dollars
in fuel expenses. It allows us to pinpoint the best
trim/rpm combination in terms of fuel economy,
and it absolutely shattered the misconception
that ‘slower is more efficient’. As the boat gets
loaded down, and the sea state kicks up, fuel
consumption changes dramatically, and the
FloScans keep us abreast of these changes in
real time. This allows us to fully utilize the range
of our boat without fear of running low on fuel
since the accuracy was within 2%! With this
information at hand we can go further out into
the Gulf of Alaska in search of trophy ling Cod
and Halibut. Your equipment has proven itself to
be invaluable, and I will never own a boat that
doesn't have FloScans installed. They're just as
much part of our required on board equipment
as a good chart plotter, and fish finder.”
Kevin Sanders
President - Bayliner Owners Club
Bayliner 3488 Avanti Flybridge
twin Cummins 6BT Diamond diesels 315 hp
“We travel between New York, Florida, and the
Bahamas. Our ability to pinpoint our most
economical running speed along these routes has
enabled us to save a substantial amount of
money and fuel. In fact, we're sure the units have
paid for themselves after just two years running.
The FloScan has also helped us with navigation.
We can rest assured that our FloScan will tell us
if we have enough fuel to make it to our next
destination.
Thank you FloScan!”
John Grilli
Rockville Center, NY
33' Blackfin
twin CAT 3208TA diesels 425 hp
“The FloScan system has allowed me to cover
the most territory possible without the risk of
running out of fuel and missing the weigh-in with
a $10,000 to $20,000 fish. It is also handy at
the end of the day when dividing up the expenses
with my fishing buddies. We can look at the fuel
totalizer and know exactly how much fuel we've
used without having to wait 30 minutes at the
gas pump for the tank to refill.”
Marcus Kennedy
Mobile, AL
31' Fountain SFCC
twin Mercury outboards 225 hp

“My only complaint about the Series K diesel
system is that it is has cut my usual installation
time by a third. And I’ve considered my jobs
pretty efficient since I’ve performed over a hundred
diesel installs. As result, I'm making less money
on FloScan installations. But on the plus side,
getting rid of the pulsation dampers has allowed
me to bid on jobs that I normally would have
turned down in the past due to the complexity
of the installation. My FloScan business has
grown quite a bit as a result of the new Series
K diesel system.”
Todd Walker
Yacht Electrical Services
Ft. Lauderdale, FL
“FloScan and a computerized propeller analysis
system solved the nagging problem of unbalanced
fuel consumption aboard my Tollycraft. The
starboard engine of the GERRI-L had begun using
20-25% more fuel than the port. There were no
unusual vibrations, yet my Series 9000 FloScans
consistently showed higher fuel use on the
starboard side.
Preparing for a summer cruise, I talked with my
long-time prop shop, Sheffield Marine Propeller,
Inc. The boat’s spare props were checked first on
Sheffield’s Hale Measurement Recording
Instrument (MRI), which checks the pitch, rake,
spacing, geometry and camber. After switching
out the suspect props, the MRI analyzed them
and printed out its findings: the starboard prop
was within spec, but the port propeller had a
blade that was far out of the norm, just opposite
what I expected to discover. Walt Sheffield pointed
out that the type of damage to the port prop
actually had reduced its pitch in the water, letting
the starboard engine carry more load and thus
use more fuel.
During the cruise, GERRI-L’s engines settled down
to a mere 1–to-2 percent fuel use variance. I
depended fully on the FloScan for trip planning
and for preventing spillage at the pump. After
initial top-off, I used the FloScan totalizer to fill
each 200-gallon tank to within five gallons of
indicated use. Then, at subsequent fuel stops, I
added precisely the totalizer gallons, knowing I
would always be just five gallons short of
overspills.”
Bill Chevalier
Portland, OR
44’ Tollycraft
twin Detroit Diesel 6V-53TI 400 hp

FL SCAN
INSTRUMENT CO, INC.

International Leaders in
Fuel Flow Technology
We’ve been connected to some well-known engines. FloScan is the world’s #1 producer of fuel monitoring systems with over 750,000 in
use today on cars, trucks, boats, and airplanes. As a matter of fact, we invented them for each of these industries. Marine engine manufacturers
use FloScan to test their engines. Boat manufacturers use FloScan for their boat test reports. Genset and prime power operators use FloScan
to determine baselines for NOx emission reporting.

SINGLE GAS INSTALLATION

SIGNAL WIRES
ENGINE

TANK
FUEL
FLOW

FILTER

SENSOR

FUEL PUMP

SENSOR

CRUISEMASTER
OPTION

ENGINE

TANK
FUEL
FLOW

FILTER

FUEL PUMP

TWIN GAS INSTALLATION

SIGNAL WIRES
ENGINE

TANK

FILTER

DIESEL INSTALLATION
TANK

TWINSCAN
OPTION

SENSOR

FUEL PUMP

TRANSFER
PUMP

FEED
SENSOR

FUEL
FLOW

ENGINE

FILTER
RETURN FLOW

RETURN
SENSOR

INJECTOR

FUEL
FLOW

RETURN FLOW SIGNAL

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Simple Installation
A FloScan gas installation is simple and straightforward,
and can be accomplished by any do-it-yourselfer.
Series K diesel installations can also be accomplished
by the do-it-yourselfer or contact FloScan for an
authorized installer.
Fail-Safe Observer
FloScan is fail-safe. With the same opto-electronic
technology used by the safety-driven aviation industry
(FloScan fuel flow sensors are FAA approved for use
in general aviation aircraft with over 100,000 installed)

FloScan Instrument Co., Inc.
3016 N.E. Blakeley Street
Seattle, Washington 98105

FL SCAN
INSTRUMENT CO, INC.

MULTIFUNCTION
OPTION

our fuel monitoring systems have a scant margin of
error of less than 2% with on-board calibration.
High Performance and Quality
FloScan is made of tough, durable components like
sapphire rotor bearings, precision aluminum and zinc
die-castings, and gold-plated detectors that will perform
in seas nasty enough to drive barracudas below decks.
And you don’t have to worry about maintenance. There
isn’t any.

Tel: 206.524.6625
Fax: 206.523.4961
Web: www.floscan.com
E-mail: sales@floscan.com

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Floscan Instrument Single Engine Fuel Meter 5510 20B 1 Users Manual

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