This service manual provides information for safely servicing Yamaha outboard motors. It is intended for use by trained Yamaha mechanics and contains instructions on specifications, technical features, troubleshooting, maintenance, and repairs. Special tools are recommended to properly service parts and avoid damage. Safety precautions are outlined, including risks from rotating parts, hot components, electricity, and chemicals like gasoline.

1. SERVICE MANUAL
LIT-18616-03-15 6BG-28197-1L-11
F40

2. Preface
This manual has been prepared by Yamaha primarily for use by Yamaha dealers and their trained
mechanics when performing maintenance procedures and repairs to Yamaha equipment. It has
been written to suit the needs of persons who have the Bronze Technical Certificate of YTA (Yamaha
Technical Academy) marine or the equivalent basic understanding of the mechanical and electrical
concepts and procedures inherent in the work, for without such knowledge attempted repairs or ser-
vice to the equipment could render it unsafe or unfit for use.
Because Yamaha has a policy of continuously improving its products, models may differ in detail
from the descriptions and illustrations given in this publication. Use only the latest edition of this
manual. Authorized Yamaha dealers are notified periodically of modifications and significant
changes in specifications and procedures, and these are incorporated in successive editions of this
manual. Also, up-to-date parts information is available on YPEC-web. Additional information and up-
to-date information on Yamaha products and services are available on Yamaha Service Portal.
Important information
Particularly important information is distinguished in this manual by the following notations:
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED!
A WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
A NOTICE indicates special precautions that must be taken to avoid damages to the out-
board motor or other property.
TIP:
A TIP provides key information to make procedures easier or clearer.
F40
SERVICE MANUAL
©2008 by Yamaha Motor Corporation, U.S.A.
1st Edition, November 2008
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, U.S.A.
is expressly prohibited.
Printed in U.S.A.
LIT-18616-03-15

3. Contents
General information 0
Specification 1
Technical features and description 2
Rigging information 3
Troubleshooting 4
Electrical system 5
Fuel system 6
Power unit 7
Lower unit 8
Bracket unit 9
Maintenance 10
Index
Appendix A
GEN
INFO
SPEC
TECH
FEA
RIG
GING
TRBL
SHTG
ELEC
FUEL
POWR
LOWR
BRKT
MNT

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6. GEN
INFO
0
1
2
3
4
5
6
7
8
9
10
A
General information 0
Safety while working ........................................................... 0-1
Rotating part .............................................................................. 0-1
Hot part ...................................................................................... 0-1
Electric shock ............................................................................ 0-1
Propeller .................................................................................... 0-1
Handling of gasoline .................................................................. 0-1
Ventilation .................................................................................. 0-1
Self-protection ........................................................................... 0-2
Working with crane .................................................................... 0-2
Handling of burner ..................................................................... 0-2
Part, lubricant, and sealant ........................................................ 0-2
Handling of sealant .................................................................... 0-2
Special service tool ................................................................... 0-3
Tightening torque ...................................................................... 0-3
Non-reusable part ...................................................................... 0-3
Disassembly and assembly ....................................................... 0-3
How to use this manual ........................................................... 0-4
Manual format ........................................................................... 0-4
Abbreviation .............................................................................. 0-5
Sealant and locking agent ...................................................... 0-6
Symbol ...................................................................................... 0-6
Special service tool .................................................................. 0-7

7. 0-1
GEN
INFO General information
Safety while working
To prevent an accident or injury and to
ensure quality service, follow the safety pro-
cedures provided below.
Rotating part
• Hands, feet, hair, jewelry, clothing, Personal
flotation device straps, and so on can
become entangled with internal rotating
parts of the engine, resulting in serious
injury or death.
• Keep the top cowling in place whenever
possible. Do not remove or replace the
cowling with the engine running.
• Only operate the engine with the cowling
removed according to the specific instruc-
tions in the manual. Keep hands, feet, hair,
jewelry, clothing, Personal flotation device
straps, and so on away from any exposed
moving parts.
Hot part
During and after operation, engine parts are
hot enough to cause burns. Avoid touching
any parts under the top cowling until the
engine has cooled.
Electric shock
Do not touch any electrical parts while start-
ing or operating the engine. They can cause
shock or electrocution.
Propeller
Do not hold the propeller with your hands
when loosening or tightening it.
Handling of gasoline
• Gasoline is highly flammable. Keep gaso-
line and all flammable products away from
heat, sparks, and open flames.
• Gasoline is poisonous and can cause injury
or death. Handle gasoline with care. Never
siphon gasoline by mouth. If you happen to
swallow some gasoline or inhale a lot of
gasoline vapor, or get some gasoline in
your eyes, see your doctor immediately. If
gasoline spills on your skin, wash with soap
and water. If gasoline spills on your cloth-
ing, change your clothes.
Ventilation
• Gasoline vapor and exhaust gas are
heavier than air and extremely poisonous. If
inhaled in large quantities they may cause
loss of consciousness and death within a
short time.
• When test running an engine indoors
(example: in a water tank), make sure to do
so where adequate ventilation can be main-
tained.

8. 0-2
Safety while working
0
1
2
3
4
5
6
7
8
9
10
A
Self-protection
• Protect your eyes by wearing safety
glasses or safety goggles during all opera-
tions involving drilling and grinding, or when
using an air compressor.
• Protect your hands and feet by wearing pro-
tective gloves and safety shoes when nec-
essary.
Working with crane
• Outboard motors weighing 18.0 kg (39.7 lb)
and over must be carried by a crane.
• Use a wire rope of adequate strength, and
lift up the outboard motor with the three
point suspension.
• If the outboard motor does not have three
or more points to be suspended, support it
with additional ropes or the like so that the
outboard motor can be lifted and carried in
a stable manner.
Handling of burner
• Incorrect handling of burner may result in
burns. Refer to the operation manual
issued by the manufacturer to assure the
correct handling.
• When using a burner, keep it away from the
gasoline and oil, to prevent a fire.
• Components become hot enough to cause
burns. Do not touch them directly.
Part, lubricant, and sealant
Use only genuine Yamaha parts, lubricants,
and sealants or those recommended by
Yamaha, when servicing or repairing the out-
board motor.
Handling of sealant
• Wear protective gloves to protect your skin,
when using the sealants.
• Refer to the material data sheet issued by
the manufacturer. Some of the sealants
may be harmful for human health.

9. 0-3
GEN
INFO General information
Special service tool
Use the recommended special service tools
to work safety, and to protect parts from dam-
age.
Tightening torque
Follow the tightening torque specifications
provided throughout the manual. When tight-
ening nuts, bolts, and screws, tighten the
large sizes first, and tighten fasteners starting
in the center and moving outward.
Non-reusable part
Always use new gaskets, seals, O-rings, cot-
ter pins, and so on, when installing or assem-
bling parts.
Disassembly and assembly
• Use compressed air to remove dust and dirt
during disassembly.
• Apply engine oil to the contact surfaces of
moving parts before assembly.
• Install bearings with the manufacture identi-
fication mark in the direction indicated in
the installation procedure. In addition, be
sure to lubricate the bearings liberally.
• Apply a thin coat of water-resistant grease
to the lip and periphery of an oil seal before
installation.
• Check that moving parts operate normally
after assembly.

10. 0-4
How to use this manual
0
1
2
3
4
5
6
7
8
9
10
A
How to use this manual
Manual format
The format of this manual has been designed to make service procedures clear and easy to under-
stand. Use the information below as a guide for effective and quality service.
• Parts are shown and detailed in an exploded diagram and are listed in the component list (see a
in the figure below for an example page).
• The component list consists of part names and quantities, as well as bolt and screw dimensions
(see b in the figure below).
• Symbols are used to indicate important aspects of a procedure, such as the grade of lubricant and
lubrication point (see c in the figure below).
• Tightening torque specifications are provided in the exploded diagrams (see d in the figure below
for an example), and in the related detailed instructions. Some torque specifications are listed in
stages as torque figures or angles in degrees.
• Separate procedures and illustrations are used to explain the details of removal, checking, and
installation where necessary (see e in the figure below for an example page).
TIP:
For troubleshooting procedures, see Chapter 4, “Troubleshooting.”
8-1
LOWR
Lower unit
Lower unit
No. Part name Q’ty Remarks
1 Drain screw 1
2 Gasket 2 Not reusable
3 Bolt 4 M10 x 40 mm
4 Check screw 1
5 Dowel 2
6 Hose nipple 1
7 Plastic tie 2 Not reusable
8 Hose 1
9 Nipple 1
10 Bolt 1 M8 x 35 mm
11 Lower unit 1
12 Anode 1
13 Propeller nut 1
14 Cotter pin 1 Not reusable
15 Washer 1
16 Washer 1
17 Propeller 1
12
18
19
20
21
3
3
11
1
3
3
4
6
5
2
7
8
9
7
5
10
2
17
16
15
14
13
9 N·m (0.9 kgf·m, 6.6 ft·lb)
40 N·m (4.0 kgf·m, 29.5 ft·lb)
35 N·m (3.5 kgf·m, 25.8 ft·lb)
9 N·m (0.9 kgf·m, 6.6 ft·lb)
8-16
Drive shaft and lower case
0
1
2
3
4
5
6
7
8
9
10
A
TIP:
• Install a new needle bearing with the identi-
fication mark b facing toward the water
pump side.
When using the driver rod, do not strike the
special service tool in a manner that will
force the stopper c out of place.
5. Heat the installation area of the taper
roller bearing outer race in the lower case
with a gas torch, and then install the drive
shaft sleeve i, original shim(s) (T3) j
and a new taper roller bearing outer race
k. NOTICE: When heating the lower
case, heat the entire installation area
evenly. Otherwise, the paint on the
lower case could be burned.
TIP:
Install the drive shaft sleeve with the protru-
sion d facing forward.
Do not reuse a shim if deformed or
scratched.
6. While holding the special service tool c,
strike the tool to check that the taper
roller bearing outer race is installed
properly. If a high-pitched metallic sound
is produced when the special service tool
is struck, the outer race is installed
properly.
7. Install the water inlet covers m, n, the
nut o and the water inlet cover screw p,
and then tighten the water inlet cover
screw p to the specified torque.
Assembling the forward gear
1. Install a new taper roller bearing a.
Driver rod SL f: 90890-06602
Needle bearing attachment g:
90890-06614
Bearing depth plate h: 90890-06603
Installation depth a:
182.5–183.0 mm (7.19–7.20 in)
a
b
c
f
f
g
h
g
e
i
j
k
d
Driver rod LL c: 90890-06605
Bearing outer race attachment l:
90890-06627
Water inlet cover screw p:
1 N·m (0.1 kgf·m, 0.7 ft·lb)
c
l
c
l
m
n
o
p
e
b
c d a
Safety while working / How to use this manual

11. 0-5
GEN
INFO General information
Abbreviation
The following abbreviations are used in this service manual.
Abbreviation Description
ABYC American Boat and Yacht Council
API American Petroleum Institute
ATDC After Top Dead Center
BTDC Before Top Dead Center
CARB California Air Resources Board
CCA Cold Cranking Ampere
C/E Check Engine
ECM Electronic Control Module
EPA Environmental Protection Agency
EX Exhaust
F Forward
IC Integrated Circuit
IN Intake
ISC Idle Speed Control
MCA Marine Cranking Ampere
N Neutral
P.O.N. Pump Octane Number = (RON+Motor Octane Number) / 2
PORT Port side
PTT Power Trim and Tilt
R Reverse
RC Reserve Capacity
SAE Society of Automotive Engineers
SOHC Single Overhead Camshaft
STBD Starboard side
TDC Top Dead Center
TPS Throttle Position Sensor
W/F Water in Fuel

12. 0-6
Sealant and locking agent
0
1
2
3
4
5
6
7
8
9
10
A
Sealant and locking agent
Symbol
Symbols in an exploded diagram or illustration indicate the grade of lubricant and the lubrication points.
Symbols in an exploded diagram or illustration indicate the type of sealant or thread locking agent
and the application points.
Symbol Name Application
Yamaha 4-stroke motor oil Lubricant
Gear oil Lubricant
Water resistant grease
(Yamaha grease A)
Lubricant
Molybdenum disulfide grease Lubricant
Corrosion resistant grease
(Yamaha grease D)
Lubricant
Low temperature resistant grease
(Yamaha grease C)
Lubricant
Symbol Name Application
Gasket Maker Sealant
ThreeBond 1104J Sealant
ThreeBond 1322 Sealant
ThreeBond 1377B Thread locking agent
ThreeBond 1401 Thread locking agent
LOCTITE 271 (red) Thread locking agent
LOCTITE 242 (blue) Thread locking agent
How to use this manual / Sealant and locking agent

13. 0-7
GEN
INFO General information
Special service tool
For U.S.A. and Canada
Special tools numbered “YB-*****” are distributed by K & L.
Special tools with Yamaha parts number (90890-*****) are distributed by the Parts Division.
Drilling plate
90890-06783
YDIS (CD-ROM, Ver. 1.32)
60V-WS853-05
YDIS (KIT)
60V-85300-05
Diagnostic test lead
YB-06795
Digital multimeter
YU-34899-A
Peak volt adapter
YU-39991
Test harness (8 pins)
YB-06879
Test harness (3 pins)
YB-06869
Symbol Name Application
LOCTITE 572 (white) Sealant
Silicone sealant Sealant

14. 0-8
Special service tool
0
1
2
3
4
5
6
7
8
9
10
A
Pressure/vacuum tester
YB-35956-A
Test harness (3 pins)
YB-06870
Test harness (2 pins)
YB-06887
Spark checker
YM-34487
Test harness (2 pins)
YB-06861
Test harness (2 pins)
YB-06867
Fuel pressure gauge adapter
YW-06842
Fuel pressure gauge
YB-06766
Compression gauge
YU-33223
Flywheel magnet holder
YB-06139
Sealant and locking agent / Special service tool

15. 0-9
GEN
INFO General information
Universal puller
YB-06117
Crankshaft holder
YW-06355
Valve spring compressor
YM-04019
Valve attachment
YB-06320
Valve guide remover
YB-06801
Valve guide reamer
YM-01196
Neway valve seat kit
YB-91044
Driver handle (large)
YB-06071
Bearing/oil seal depth plate
YB-06110
Piston ring compressor
YM-08037

16. 0-10
Special service tool
0
1
2
3
4
5
6
7
8
9
10
A
Slide hammer
YB-06096
Bearing puller legs
YB-06523
Bearing housing needle bearing remover
YB-06112
Bearing housing bearing/installer
YB-06111
Oil seal installer
YB-06168
Bearing inner race attachment
90890-06639
Bearing cup installer
YB-06167
Drive shaft holder
YB-06079
Pinion nut holder
90890-06715
Bearing splitter plate
YB-06219

17. 0-11
GEN
INFO General information
Roller bearing installer/remover
YB-06432
Driveshaft needle bearing remover/
installer
YB-06063
Forward gear outer race installer
YB-41446
Drive shaft needle bearing remover/
installer
YB-06063
Forward gear bearing installer
YB-06270-A
Bearing installer
YB-06016
Shift rod push arm
YB-06052
Bearing housing puller
YB-06234
Backlash indicator rod
YB-06265
Backlash adjustment plate
YB-07003

18. 0-12
Special service tool
0
1
2
3
4
5
6
7
8
9
10
A
Dial indicator gauge
YU-03097
Magnetic base stand
YU-A8438
Pinion height gauge
90890-06668
Reverse gear bearing remover
YB-41707
Pinion gear bushing installer
YB-06029-4
Driver handle (small)
YB-06229
Crankshaft seal installer
YB-06349
Driveshaft needle bearing installer and
remover
YB-06230
PTT cylinder wrench
YB-06175-2B

19. SPEC
Specification 1
Model features ............................................................................ 1-1
General feature ......................................................................... 1-1
Model designation ..................................................................... 1-2
Serial number ............................................................................ 1-2
Model data ................................................................................... 1-3
Dimension and Weight .............................................................. 1-3
Performance .............................................................................. 1-3
Power unit ................................................................................. 1-3
Lower unit .................................................................................. 1-4
Bracket unit ............................................................................... 1-4
Fuel and oil requirement ............................................................ 1-4
Battery requirement ................................................................... 1-5
PTT requirement ....................................................................... 1-5
Electrical technical data .......................................................... 1-5
Ignition timing control system .................................................... 1-5
Fuel injection control system ..................................................... 1-6
Engine speed control system .................................................... 1-6
PTT system ............................................................................... 1-7
Charging system ....................................................................... 1-7
Starting system .......................................................................... 1-7
Gauge / sensor .......................................................................... 1-8
Fuel system technical data ..................................................... 1-8
Fuel system ............................................................................... 1-8
Power unit technical data ....................................................... 1-9
Power unit ................................................................................. 1-9
Cylinder head assembly .......................................................... 1-10
Crankcase assembly ............................................................... 1-11
Lower unit technical data ...................................................... 1-12
Lower unit assembly ................................................................ 1-12
Bracket unit technical data ................................................... 1-12
PTT system ............................................................................. 1-12
Special tightening torque ...................................................... 1-12
Electrical system ..................................................................... 1-12
Fuel system ............................................................................. 1-13
Power unit ............................................................................... 1-13
Lower unit ................................................................................ 1-14
Tiller handle model .................................................................. 1-14
Bracket unit ............................................................................. 1-15

20. 0
1
2
4
5
6
7
8
9
10
A
PTT unit ................................................................................... 1-15
Optional equipment ................................................................. 1-15
General tightening torque ..................................................... 1-16

21. 1-1
SPEC
Specification
Model features
General feature
F40 Overall features
• Electronic fuel injected, 4-stroke, L3, SOHC, 6-valve, 747.0 cm3 (45.6 cu. in) engine
• Low emission in compliance with US EPA and US CARB 3-STAR emission standards
• Command Link Multifunction Meter (option)
a Power unit
• Multipoint electronic fuel injection
• Single throttle body
• Long intake manifold
• Blowby gas reburning system
• Fuel cooler
• Closed fuel vapor gas system
• One piece top cowling with water draining
air intake duct
• Speed sensor and water pressure sensor
(option)
b Electrical
• Variable trolling speed control (tiller handle
model or Command Link Multifunction
Meter equipped model)
• Alert systems including low oil pressure,
overheat, and water detection
• New YDIS 1.32 version
• Start-in-gear protection
c Bracket unit
• Long span mounts
• Small and compact PTT (PTT model)
• High-pressure gas-assisted hydro tilt (hydro
tilt model)
• Multifunction tiller handle
d Upper case
• Labyrinth idle exhaust system
e Lower unit
• Lower unit equivalent to that of a one-class-
higher model
a
d
b
c
e

22. 1-2
Model features
0
1
2
3
4
5
6
7
8
9
10
A
Model designation
Serial number
The outboard motor serial number is
stamped on a label attached to the port
clamp bracket.
a Model name
b Approved model code
c Transom height
d Serial number
a Model description F: 4-stroke regular rotation
b Model name 40: 40
c Transom height
S: S (15 in)
L: L (20 in)
d
Functions
E: Electric starter
Blank: PTT and electric starter
e
H: Tiller handle
Blank: Remote control
Blank: Hydro tilt
f Product generation A: A and up
F 40 L E H A
ba c d e f
YAMAHA MOTOR CO., LTD.
MADE IN JAPAN
PAYS D'ORIGINE JAPON
b
c a
d
Model name
Approved
model code
Starting
serial No.
F40EHA
6BG
1000001–
F40EA 1000001–
F40A 1000001–

23. 1-3
SPEC
Specification
Model data
Dimension and Weight
Performance
Power unit
Item Unit
Model
F40EHA F40EA F40A
Overall length mm (in) 1362.0 (53.6) 717.0 (28.2)
Overall width mm (in) 384.0 (15.1)
Overall height
(S) mm (in) 1228.0 (48.3) —
(L) mm (in) 1350.0 (53.1) — 1350.0 (53.1)
Boat transom height
(S) mm (in) 414.0 (16.3) —
(L) mm (in) 536.0 (21.1) — 536.0 (21.1)
Weight (without propeller)
(S) kg (lb) 97.1 (214.1) 92.1 (203.4) —
(L) kg (lb) 102.7 (226.4) — 99.6 (219.6)
Item Unit
Model
F40EHA F40EA F40A
Maximum output kW (HP) 29.2 (40) at 5500 r/min
Full throttle operating range r/min 5000–6000
Maximum fuel consumption
L (US gal,
Imp gal)/hr
13.6 (3.6, 3.0) at 5500 r/min
Engine idle speed r/min 750–850
Item Unit
Model
F40EHA F40EA F40A
Type 4-stroke, SOHC L
Cylinder quantity 3
Total displacement cm³ (cu. in) 747.0 (45.6)
Bore × stroke mm (in) 65.0 × 75.0 (2.56 × 2.95)
Compression ratio 9.40 : 1
Control system Tiller handle Remote control
Starting system Electric
Fuel system Fuel injection
Ignition control system CDI (built-in to the engine ECM)
Advance type Microcomputer
Maximum generator output V, A 12.0, 17.0
Spark plug DPR6EB-9 (NGK)
Firing order 1–2–3
Cooling system Water
Exhaust system Propeller boss
Lubrication system Wet sump

24. 1-4
Model data
0
1
2
3
4
5
6
7
8
9
10
A
Lower unit
Bracket unit
Fuel and oil requirement
(*1) If the recommended engine oil grades are not available, use engine oil with an API classification of SH,
SJ, or SL and an SAE classification of 15W-40, 20W-40, or 20W-50.
(*2) Meeting both API and SAE requirements.
Item Unit
Model
F40EHA F40EA F40A
Gear shift positions F-N-R
Gear ratio 2.00 (26/13)
Reduction gear type Spiral bevel gear
Clutch type Dog clutch
Propeller shaft type Spline
Propeller direction (rear view) Clockwise
Propeller mark G
Item Unit
Model
F40EHA F40EA F40A
Trim angle (at 12º boat transom) Degree –3 to 16
Tilt-up angle Degree 65 66
Steering angle Degree 40 + 40
Trim and tilt system Hydro PTT
Item Unit
Model
F40EHA F40EA F40A
Fuel type Regular unleaded gasoline
Fuel minimum rating PON 85
Engine oil
YAMALUBE 4-M FC-W oil or 4-stroke motor oil
with combination of the following SAE and API
oil classifications
Engine oil grade (*1)
API SE, SF, SG, SH, SJ, or SL
SAE 5W-30, 10W-30, or 10W-40
Total engine oil quantity
without oil filter replacement
L (US qt,
Imp qt)
1.5 (1.59, 1.32)
with oil filter replacement
L (US qt,
Imp qt)
1.7 (1.80, 1.50)
Gear oil type Hypoid gear oil
Gear oil grade(*2)
API GL-4
SAE 90
Gear oil quantity
L (US qt,
Imp qt)
0.430 (0.455, 0.378)

25. 1-5
SPEC
Specification
Battery requirement
PTT requirement
Electrical technical data
Ignition timing control system
Item Unit
Model
F40EHA F40EA F40A
Minimum cold cranking amps
CCA/SAE A 380.0
Minimum marine cranking amps
MCA/ABYC A 502.0
Minimum reserve capacity
RC/SAE Minutes 124
Item Unit
Model
F40EHA F40EA F40A
Fluid type — ATF Dexron II
Item Unit
Model
F40EHA F40EA F40A
Engine ECM
Output peak voltage
at cranking (unloaded) V 100.0
Spark plug cap
Resistance (*1)
at 20 °C (68 °F) kΩ 5.0
Ignition coil
Primary coil resistance (*1)
at 20 °C (68 °F) Ω 0.1789–0.2415
Secondary coil resistance
at 20 °C (68 °F) kΩ 3.256–4.884
Pulser coil
Output peak voltage
at cranking (unloaded) V 5.0
at cranking (loaded) V 2.7
at 1500 r/min (loaded) V 6.5
at 3500 r/min (loaded) V 9.8
Resistance
at 20 °C (68 °F) Ω 152.0–228.0
Air gap mm (in) 0.35–1.35 (0.014–0.053)
Thermo sensor
Input voltage V 4.75–5.25
Resistance (*1)
at 20 °C (68 °F) kΩ 26.460
at 75 °C (167 °F) kΩ 0.370
at 90 °C (194 °F) Ω 240.3

26. 1-6
Electrical technical data
0
1
2
3
4
5
6
7
8
9
10
A
(*1) The figures are for reference only.
Fuel injection control system
(*1) The figures are for reference only.
Engine speed control system
Neutral switch
Input voltage (*1) V 11.1
Spark plug
Gap mm (in) 0.8–0.9 (0.032–0.035)
Item Unit
Model
F40EHA F40EA F40A
Water detection switch
Input voltage V 4.75–5.25
Float height (*1) mm (in) 19.4 (0.74)
Fuel injector
Input voltage V 12.0
Resistance (*1)
at 20 °C (68 °F) Ω 12.0
High-pressure fuel pump
Input voltage V 12.0
Resistance (*1)
at 20 °C (68 °F) Ω 1.4–1.7
Vapor shut-off valve
Input voltage V 12.0
Resistance
at 20 °C (68 °F) Ω 30.0–34.0
Item Unit
Model
F40EHA F40EA F40A
Throttle body
Input voltage V 4.75–5.25
TPS
Output voltage (*1)
with throttle valve fully
closed
V 0.674
with throttle valve fully
open
V 3.680
Throttle valve opening angle
(*1)
with throttle valve fully
closed
Degree 0.1
with throttle valve fully
open
Degree 75.3
Item Unit
Model
F40EHA F40EA F40A
Model data / Electrical technical data

27. 1-7
SPEC
Specification
(*1) The figures are for reference only.
PTT system
(*1) The figures are for reference only.
Charging system
(*1) The figures are for reference only.
Starting system
Oil pressure switch
Input voltage V 12.0
Working pressure
kPa (kgf/
cm2, psi)
29.4–58.8 (0.294–0.588, 4.3–8.5)
Item Unit
Model
F40EHA F40EA F40A
Trim sensor
Free position resistance (*1) Ω — 238.8–378.8
Setting resistance Ω — 9.0–11.0
Item Unit
Model
F40EHA F40EA F40A
Lighting coil
Output peak voltage
at cranking (unloaded) V 14.0
at 1500 r/min (unloaded) V 45.0
at 3500 r/min (unloaded) V 102.0
Resistance (*1)
at 20 °C (68 °F) Ω 0.561–0.759
Fuse A 30
Rectifier Regulator
Output peak voltage
at 1500 r/min (unloaded) V 13.0
at 3500 r/min (unloaded) V 13.0
Item Unit
Model
F40EHA F40EA F40A
Starter motor
Type Sliding gear
Output kW 0.90
Cranking time limit Second 30
Commutator
Standard diameter mm (in) 29.4 (1.16)
Wear limit mm (in) 28.8 (1.13)
Standard undercut mm (in) 0.5 (0.02)
Wear limit mm (in) 0.2 (0.01)
Item Unit
Model
F40EHA F40EA F40A

28. 1-8
Fuel system technical data
0
1
2
3
4
5
6
7
8
9
10
A
Gauge / sensor
(*1) The figures are for reference only.
Fuel system technical data
Fuel system
Brushes
Standard length mm (in) 12.3 (0.48)
Wear limit mm (in) 5.5 (0.22)
Item Unit
Model
F40EHA F40EA F40A
Water pressure sensor
Input voltage V 4.75–5.25
Output voltage (*1)
at 392.0 kPa (3.92 kgf/
cm2, 56.8 psi)
V 2.5
at 784.0 kPa (7.84 kgf/
cm2, 113.7 psi)
V 4.5
Speed sensor
Input voltage V 4.75–5.25
Output voltage (*1)
at 392.0 kPa (3.92 kgf/
cm2, 56.8 psi)
V 2.5
at 784.0 kPa (7.84 kgf/
cm2, 113.7 psi)
V 4.5
Item Unit
Model
F40EHA F40EA F40A
Fuel pressure (*1)
Within 3 seconds after
engine start switch turned to
“ON”
kPa (kgf/
cm2, psi)
280.0 (2.80, 40.6)
at engine idle speed
kPa (kgf/
cm2, psi)
230.0 (2.30, 33.4)
Fuel joint
Holding pressure
Positive pressure
kPa (kgf/
cm2, psi)
50.0 (0.50, 7.3)
Fuel filter assembly
Holding pressure
Positive pressure
kPa (kgf/
cm2, psi)
200.0 (2.00, 29.0)
Negative pressure
kPa (kgf/
cm2, psi)
80.0 (0.80, 11.6)
Item Unit
Model
F40EHA F40EA F40A
Electrical technical data / Fuel system technical data

29. 1-9
SPEC
Specification
(*1) The figures are for reference only.
Power unit technical data
Power unit
(*1) Measuring conditions: Ambient temperature 20 °C (68 °F), fully open throttle, and the spark plugs
removed from all cylinders. The figures are for reference only.
(*2) For details of the checking method, see “Checking the oil pressure” (7-1). The figures are for reference
only.
Fuel pump
Holding pressure
Inlet positive pressure
kPa (kgf/
cm2, psi)
50.0 (0.50, 7.3)
Inlet negative pressure
kPa (kgf/
cm2, psi)
30.0 (0.30, 4.4)
Outlet positive pressure
kPa (kgf/
cm2, psi)
50.0 (0.50, 7.3)
Primer pump
Holding pressure
Positive pressure
kPa (kgf/
cm2, psi)
170.0 (1.70, 24.7)
Vapor separator tank
Float height (open) mm (in) 42.1 ± 2.0 (1.66 ± 0.08)
Float height (closed) (*1) mm (in) 30.7 (1.21)
Fuel strainer
Holding pressure
kPa (kgf/
cm2, psi)
200.0 (2.00, 29.0)
Item Unit
Model
F40EHA F40EA F40A
Cylinder
Minimum compression pres-
sure (*1)
kPa (kgf/
cm2, psi)
840.0 (8.40, 121.8)
Engine oil
Oil pressure (*2)
at 60 °C (140 °F) with SL
10W-30 engine oil and at
800 r/min
kPa (kgf/
cm2, psi)
230.0 (2.30, 33.4)
at 61 °C (142 °F) with SL
10W-30 engine oil and at
3000 r/min
kPa (kgf/
cm2, psi)
480.0 (4.80, 69.6)
Thermostat
Valve opening temperature °C (°F) 58–62 (136–144)
Fully open temperature °C (°F) 70 (158)
3.0 (0.12)Fully open stroke mm (in)
Item Unit
Model
F40EHA F40EA F40A

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