The engine exhaust from this
product contains chemicals
known to the State of California to
cause cancer, birth defects, or
other reproductive harm.
Keep this owner’s manual handy, so you can refer to it at any time. This owner’s
manual is considered a permanent part of the outboard motor and should remain with
the outboard motor if resold.
2008 Honda Motor Co., Ltd.All Rights Reserved
The information and specifications included in this publication were in effect at the
time of approval for printing. Honda Motor Co., Ltd. reserves the right, however, to
discontinue or change specifications or design at any time without notice and without
incurring any obligation whatever. No part of this publication may be reproduced
without written permission.
−
INTRODUCTION
Congratulations on your selection of
a Honda outboard motor. We are
certain you will be pleased with your
purchase of one of the finest
outboard motors on the market.
We want to help you get the best
results from your new outboard
motor and to operate it safely. This
manual contains information on how
to do that; please read it carefully.
As you read this manual you will
find information preceded by a
symbol. That information
is intended to help you avoid damage
to your outboard motor, other
property, or the environment.
We suggest you read the warranty
policy to fully understand its
coverage and your responsibilities of
ownership.
When your outboard motor needs
scheduled maintenance, keep in mind
that your Honda Marine dealer is
specially trained in servicing Honda
outboard motors. Your Honda
Marine dealer is dedicated to your
satisfaction and will be pleased to
answer your questions and concerns.
Best Wishes,
Honda Motor Co., Ltd.
1
INTRODUCTION
A FEW WORDS ABOUT
SAFETY
Your safety and the safety of others
are very important. And using this
outboard motor safely is an important
responsibility.
To help you make informed
decisions about safety, we have
provided operating procedures and
other information on labels and in
this manual. This information alerts
you to potential hazards that could
hurt you or others.
Of course, it is not practical or
possible to warn you about all the
hazards associated with operating or
maintaining an outboard motor. You
must use your own good judgment.
You will find important safety information in a variety of forms, including:
Safety Labels
Safety Messages
three signal words, DANGER, WARNING, or CAUTION.
These signal words mean:
Safety Headings
Safety Section
Instructions
This entire book is filled with important saf ety informationplease read it
carefully.
−
on the outboard motor.
−
preceded by a safety alert symboland one of
You WILL be KILLED or SERIOUSLY
HURT if you don’t follow instructions.
You CAN be KILLED or SERIOUSLY
HURT if you don’t follow instructions.
You CAN be HURT if you don’t follow
instructions.
−
such as
−
such as
−
how to use this outboard motor correctly and safely.
IMPORTANT SAFETY INFORMATION.
OUTBOARD MOTOR SAFETY.
−
2
CONTENTS
...................................OUTBOARD MOTOR SAFETY. 7
The Honda BF40D/BF50D outboard
motors are designed for use with
boats that have a suitable
manufacturer’s power
recommendation. Other uses can
result in injury to the operator or
damage to the outboard motor and
other property.
Most accidents can be prevented if
you follow all instructions in this
manual and on the outboard motor.
The most common hazards are
discussed in this chapter, along with
the best way to protect yourself and
others.
Operator Responsibility
It is the operator’s responsibility to
provide the necessary safeguards
to protect people and property.
Know how to stop the engine
quickly in case of emergency.
Understand the use of all controls.
Stop the engine immediately if
anyone falls overboard, and do not
run the engine while the boat is
near anyone in the water.
Always stop the engine if you
must leave the controls for any
reason.
Attach the emergency stop switch
lanyard securely to the operator.
Always wear a PFD (Personal
Flotation Device) while on the
boat.
Familiarize yourself with all laws
and regulations relating to boating
and the use of outboard motors.
Be sure that anyone who operates
the outboard motor receives proper
instruction.
Be sure the outboard motor is
properly mounted on the boat.
Do not remove the engine cover
while the engine is running.
7
OUTBOARD MOTOR SAFETY
Carbon Monoxide HazardRefuel With Care
Gasoline is extremely flammable,
and gasoline vapor can explode.
Refuel outdoors, in a wellventilated area, with the engine
stopped. Never smoke near
gasoline, and keep other flames
and sparks away.
Refuel carefully to avoid spilling
fuel. Avoid overfilling the fuel
tank.
After refueling, tighten the filler
cap securely. If any fuel is spilled,
make sure the area is dry before
starting the engine.
Exhaust gas contains poisonous
carbon monoxide. Do not inhale
exhaust gas. Never run the engine in
a closed garage or confined area.
8
SAFETY LABEL LOCATION
OUTBOARD MOTOR SAFETY
FUEL TANK
(optional equipment)
(LH type)
The label shown here contains important safety information. Please read it carefully. This label is considered a
permanent part of your outboard motor. If the label comes off or becomes hard to read, contact an authorized Honda
Marine dealer for a replacement.
9
CONTROLS AND FEATURES
CONTROL AND FEATURE IDENTIFICATION CODES
Model
Type
L
Shaft Length
X
Tiller Handle
Remote Control
Gas Assist Tilt
Power Trim/Tilt
Tachometer (optional equipment)
Trim Meter (optional equipment)
BF40DBF50D
LH
LRTLRTXRT
Refer to this chart for an explanation of the Type Codes used in this manual to identify control and feature applications.
TYPE CODE (Example)
L
RT
T=Power Trim/Tilt
None=Gas Assist Tilt
H=Tiller Handle
R=Remote Control
L=20.5 in (521 mm) (Long Shaft)
X=24.5 in (622 mm) (Extra Long Shaft)
The ignition switch controls the
ignition system and the starter motor.
START
IGNITION
SWITCH
KEY
Turning the ignition switch key to the
START position operates the starter
motor. The key automatically returns
to the ON position when released
from the START position.
The engine will not start unless the
gearshift lever is in the N (neutral)
position (p.) and the emergency
43
stop switch clip is in the emergency
stop switch.
Turning the ignition switch to the
OFF position stops the engine.
Emergency Stop Switch Clip and
Emergency Stop Switch
EMERGENCY STOP SWITCH
EMERGENCY
STOP SWITCH
LANYARD
EMERGENCY STOP SWITCH CLIP
EMERGENCY STOP
SWITCH CLIP
EMERGENCY STOP
SWITCH LANYARD
17
CONTROLS AND FEATURES
The emergency stop switch clip must
be inserted in the emergency stop
switch in order for the engine to start
and run. The emergency stop switch
lanyard must be attached securely to
the operator or to the operator’s PFD
(Personal Flotation Device).
When used as described, the
emergencystopswitchand
emergency stop switch lanyard
system stops the engine if the
operator falls away from the controls.
A spare switch clip is provided in the
tool bag (p.).66
Throttle Grip
THROTTLE GRIP
THROTTLE INDEX MARK
INCREASE
The throttle grip controls engine
speed.
An index mark on the tiller arm
shows throttle position and is helpf ul
for setting the throttle correctly when
starting (p.).
55
18
CONTROLS AND FEATURES
Gearshif t LeverThrottle Friction AdjusterSteering Friction Adjuster
THROTTLE FRICTION
ADJUSTER
FIX
RELEASE
THROTTLE GRIP
The throttle friction adjuster adjusts
resistance to throttle grip rotation.
Turn the adjuster clockwise to
increase friction for holding a throttle
setting while cruising.
Turn the adjuster counterclockwise to
decrease friction for easy throttle grip
rotation.
F
(forward)
GEARSHIFT LEVER
N (neutral)
R (reverse)
The gearshift lever is used to select F
(forward), N (neutral), or R (reverse)
gears.
The engine can be started with the
gearshift lever in the N (neutral)
position only.
The steering friction adjuster adjusts
steering resistance.
Less friction allows the outboard
motor to turn more easily. More
friction helps to hold a steady course
while cruising or to prevent the
outboard motor from swinging while
trailering the boat.
19
CONTROLS AND FEATURES
Transom Angle Adjusting RodTilt Lever (LH type)
STERN BRACKET
TTUURRNN UUPP
PPUUSSHH
The transom angle adjusting rod
limits the tilt angle of the outboard
motor when fully lowered.
Proper adjustment prevents the
outboard motor from being trimmed
too low (p.).
58
There are five transom angle
FFRREEEE
((TTIILLTT))
adjustment positions. Four are
controlled by the adjusting rod and
LLOOCCKK ((RRUUNN))
the fif th is controlled by the stern
bracket. In order to use the fifth
TRANSOM ANGLE ADJUSTING ROD
(storage position)
TO CHANGE
UNLOCKED POSITION
position, remove the adjusting rod
and store it in the storage location,
then lower the motor down to the
stern bracket stop position.
Moving the tilt lever to the FREE
(TILT) position allows the motor to
be tilted and moving the tilt lever to
the LOCK (RUN) position locks the
motor in the desired position. Use the
tilt lever to temporarily tilt the motor
when the boat is operating in shallow
water, or mooring in shallow water.
The tilt lever must be in the LOCK
(RUN) position before operating the
TO LOCK
LOCKED POSITION
motor or the motor could tilt up when
operatinginreverse.
TRANSOM ANGLE ADJUSTING ROD
TILT LEVER
20
CONTROLS AND FEATURES
(remote control/optional
equipment)
For panel-mount or top-mount
remote control information, refer to
the instructions provided with the
remote control equipment.
Side-Mount Control TypeLRT and XRT Types
Ignition Switch
OONN
OOFFFF
IGNITION
SWITCH
EMERGENCY STOP
SWITCH
SWITCH CLIP
The ignition switch controls the
ignition system and the starter motor.
SSTTAARRTT
Turning the ignition switch key to the
START position operates the starter
motor. The key automatically returns
to the ON position when released
from the START position.
The ignition switch can be used to
start the engine only when the control
lever is in the N (neutral) position (p.
) and the emergency stop switch
46
clip is in the emergency stop switch.
Turning the ignition switch to the
OFF position stops the engine.
21
CONTROLS AND FEATURES
Emergency Stop Switch Clip and
Emergency Stop Switch
EMERGENCY STOP SWITCH
EMERGENCY STOP
SWITCH CLIP
EMERGENCY STOP
SWITCH CLIP
EMERGENCY
STOP
SWITCH
LANYARD
EMERGENCY
STOP SWITCH
LANYARD
The emergency stop switch clip must
be inserted in the emergency stop
switch in order for the engine to start
and run. The emergency stop switch
lanyard must be attached to the
operator’s PFD (Personal Flotation
Device) or to the operator securely.
When used as described, the
emergency stop switch clip and
emergency stop switch lanyard
system stops the engine if the
operator falls away from the controls.
A spare switch clip is stored in a slot
in the control housing.
SPARE SWITCH CLIP
22
CONTROLS AND FEATURES
Gearshift/Throttle Control
Lever
GEARSHIFT/THROTTLE
CONTROL LEVER
MAXIMUM
NEUTRAL
RELEASE LEVER
The gearshift/throttle control lever
controls engine speed and selects F
(forward), N (neutral), or R (reverse)
GEARSHIFT/THROTTLE
CONTROL LEVER
Moving the control lever 30° from N
(neutral) selects the gear, and further
movement increases engine speed.
gears.56
F (FORWARD)
MMIINNIIMMUUMM
TTHHRROOTTTTLLEE OOPPEENNIINNGG
N (NEUTRAL)
30°
SHIFT
A friction adjuster near the base of
the control lever(s) adjusts the
operating resistance of the control
lever(s). Refer to p..
30°
SHIFT
MMIINNIIMMUUMM
R (REVERSE)
TTHHRROOTTTTLLEE OOPPEENNIINNGG
The control lever automatically locks
itself in the N (neutral) position. To
move the lever out of the N (neutral)
position, you must squeeze the
neutral release lever on the underside
Less friction allows easier control
lever movement. More friction helps
to hold a steady throttle setting while
cruising.
of the lever handle.
MAXIMUM
23
CONTROLS AND FEATURES
Fast Idle Lever
N (neutral)
FAST IDLE LEVER
MAXIMUM FAST IDLE
START
(LOWEST
POSITION)
Use the fast idle lever to accelerate
engine warm-up after starting the
engine. Do not use the fast idle lever
when starting the engine.
See pagefor engine warm-up
48
instructions.
24
The fast idle lever allows you to
increase the idle speed only when the
control lever is in the N (neutral)
position. Place the fast idle lever in
its START (fully lowered) position
to cancel the fast idle and return the
control lever to normal operation.
CONTROLS AND FEATURES
Power Trim/Tilt SwitchPower Tilt Switch (engine pan)
The power trim/tilt switch is located
on the control lever. It is a rocker
CONTROL LEVER
Press UP to trim
or tilt the motor
up.
switch with UP and DN (down)
positions for changing the angle of
the outboard motor.
You can use the power trim/tilt
switch anytime whether the boat is
Press DN to trim
or tilt the motor
down.
underway, stopped, or the ignition
switch is in the OFF position. It is
necessary for the ignition switch to
be in the ON position for the trim
POWER TRIM/TILT SWITCH
meter to indicate the motor angle.
Trim the outboard motor to obtain
the best performance and stability
(p.).
58
POWER TILT SWITCH
The power tilt switch is located on
the engine pan. It is a rocker switch
with UP and DN (down) positions
for changing the angle of the
Tilt the outboard motor for shallow
outboard motor.
water operation, beaching, launching,
or mooring.
The power tilt switch will operate
without turning the ignition switch
ON.
This switch is used with the engine
stopped to raise the outboard motor
for mooring, trailering, or
maintenance.
25
CONTROLS AND FEATURES
Manual Relief Valve
RIGHT STERN BRACKET
POWER
(To fix)
MANUAL RELIEF VALVE
MANUAL
(To release)
The outboard motor can be tilted
manually after opening the manual
relief valve. This allows the outboard
motor to be tilted up or down when
no battery is connected.
Check that nobody is under the
outboard motor before opening the
manual relief valve. If the manual
relief valve is loosened (turned
counterclockwise) when the outboard
motor is tilted up, the outboard motor
will suddenly tilt down.
26
CONTROLS AND FEATURES
Common Controls
Tilt Lock Lever
TTIILLTT LLOOCCKK LLEEVVEERR
FFRREEEE
LLOOCCKK
The tilt lock lever is used to support
the outboard motor in the fully-raised
position.
When the boat is to be moored for a
long time, tilt the outboard motor up
as far as it will go. Then move the tilt
lock lever to the LOCK position, and
gently lower the outboard motor until
the lever contacts the stern bracket.
Engine Cover LatchesTrim Tab
(front)
ENGINE
COVER
LATCH
UUNNLLAATTCCHH
(rear)
The engine cover latches fasten the
engine cover to the outboard motor.
FFIIXX
FFIIXX
ENGINE
COVER
LATCH
UNLATCH
PROPELLER
The trim tab compensates for
‘‘torque steer,’’ which is a reaction of
the outboard motor to propeller
rotation.
If uncompensated, torque steer would
make the outboard motor tend to turn
to one side.
When the trim tab is correctly
adjusted (p.), steering eff ort is
equal in either direction.
TRIM TAB BOLT
TRIM TAB
69
27
CONTROLS AND FEATURES
[optional equipment (all types)][optional equipment (LRT and
Trim Meter
[optional equipment (LRT and
XRT types)]
TRIM METER
The trim meter indicates the relative
trim angle of the outboard motor.
Refer to the trim meter when using
the power trim/tilt switch to achieve
the best performance from the boat.
The tachometer shows engine speed
in revolutions per minute.
Refer to the tachometer when using
the throttle and power trim/tilt
controls to achieve the best
performance from the boat.
Digital TachometerTachometerINSTRUMENTS
XRT types)]
TACHOMETER
Digital Tachometer includes the
following functions.
Tachometer
Hour Meter
Trim Meter
Oil Pressure Indicator
Overheat Indicator
ACG Indicator
PGM-FI Indicator
Refer to the Operation Guide
included with the Digital Tachometer
for operation information.
28
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