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.
2006 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 safety 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
........................WIRING DIAGRAMS. Inside Back Cover
6
OUTBOARD MOTOR SAFETY
IMPORTANT SAFETY
INFORMATION
The Honda BF40A and BF50A
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 below, 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.
Remove any portable fuel tank
from the boat for refueling. Keep
the portable fuel tank away from
the battery or other potential spark
sources.
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. Avoid inhalation
of exhaust gas. Never run the engine
in a closed garage or confined area.
8
SAFETY LABEL LOCATIONS
OUTBOARD MOTOR SAFETY
(LH type)
The labels shown here contain important safety information. Please read them carefully. These labels are considered
permanent parts of your outboard motor. If a 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
Long Tiller Handle
Remote Control
Gas Assist Tilt
Power Trim/Tilt
Tachometer (optional equipment)
Trim Meter (optional equipment)
LH
BF40A
LRT
BF50A
LRTXRT
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=Long Tiller Handle
R=Remote Control
L=Long Shaft
X=Extra Long Shaft
10
COMPONENT AND CONTROL LOCATIONS
LH Type
(long tiller handle)
FUEL HOSE CONNECTOR
LONG TILLER
HANDLE
STERN
BRACKET
TRANSOM ANGLE
ADJUSTING ROD
GEAR OIL LEVEL
CHECK SCREW
ENGINE COVER
ANTIVENTILATION
PLATE
TRIM TAB (anode)
EXHAUST PORT
OIL LEVEL
DIPSTICK
COOLING
SYSTEM
INDICATOR
ENGINE OIL
DRAIN BOLT
COVER
CONTROLS AND FEATURES
OIL FILLER CAP
TILT LOCK LEVER
TILT LEVER
WASH SCREW
(Flush screw)
GEAR OIL
DRAIN SCREW
PROPELLER
(optional equipment)
WATER INTAKE
11
CONTROLS AND FEATURES
GEARSHIFT LEVER
THROTTLE FRICTION ADJUSTER
THROTTLE GRIP
OIL PRESSURE
INDICATOR
OVERHEAT
INDICATOR
IGNITION SWITCH
SWITCH CLIP
EMERGENCY STOP SWITCH
LANYARD
STEERING FRICTION ADJUSTER
IGNITION SWITCH KEY
12
LRT and XRT Types (remote control)
CONTROLS AND FEATURES
FUEL HOSE
CONNECTOR
STEERING
PLATE
TRANSOM ANGLE
ADJUSTING ROD
GEAR OIL LEVEL
CHECK SCREW
WASH SCREW
(Flush screw)
ENGINE COVER
GEAR OIL
DRAIN SCREW
POWER TILT SWITCH
COOLING SYSTEM
INDICATOR
ENGINE OIL DRAIN
BOLT COVER
TRIM TAB
(anode)
EXHAUST PORT
PROPELLER
(optional equipment)
OIL FILLER CAP
OIL LEVEL
DIPSTICK
TILT LOCK LEVER
STERN
BRACKET
MANUAL RELIEF
VALVE
ANTIVENTILATION
PLATE
WATER INTAKE
13
CONTROLS AND FEATURES
Remote Control box (optional equipment)
Side-Mount Type
POWER TRIM/TILT SWITCH
SPARE SWITCH CLIP
GEARSHIFT/THROTTLE
CONTROL LEVER
NEUTRAL RELEASE LEVER
OIL PRESSURE INDICATOR
OVERHEAT INDICATOR
14
BUZZER (inside of the box)
IGNITION SWITCH
LANYARD
CONTROL LEVER FRICTION ADJUSTER
FAST IDLE LEVER
IGNITION SWITCH KEY
EMERGENCY STOP SWITCH
SWITCH CLIP
CONTROLS AND FEATURES
Fuel Tank
(optional equipment)
FUEL TANK
(optional equipment)
PRIMING BULB
FUEL GAUGE
FUEL HOSE
(standard equipment)
FUEL HOSE CONNECTOR
(female)
Tachometer
[optional equipment (LH, LRT
and XRT types)]
VENT KNOB
FUEL FILLER CAP
Trim Meter
[optional equipment (LRT and
XRT types)]
15
CONTROLS AND FEATURES
CONTROLS
LH Type
(long tiller handle)
Ignition Switch
IGNITION SWITCH
ON
START
OFF
The ignition switch controls the
ignition system and starter motor.
Turning the ignition switch key to the
START position starts the engine.
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
gearshift lever is in the N (neutral)
position (p.), and the switch clip
38
is in the emergency stop switch.
Turning the ignition switch to the
OFF position stops the engine.
Emergency Stop Switch and
Switch Clip
EMERGENCY STOP SWITCH
LANYARD
SWITCH CLIP
SWITCH CLIP
LANYARD
16
CONTROLS AND FEATURES
The switch clip must be inserted in
the engine stop switch in order for
the engine to start and run. The
lanyard should be attached to the
operator’s PFD (Personal Flotation
Device) or worn around the wrist as
shown.
When used as described, the
emergency stop switch and lanyard
system stops the engine if the
operator falls away from the controls.
A spare switch clip is supplied with
the motor (LH type).
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.).
47
17
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.
N (neutral)
F
(forward)
GEARSHIFT
LEVER
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.
STEERING FRICTION ADJUSTER
LOCK
FREE
The steering friction adjuster adjusts
steering resistance.
Less friction allows the outboard
motor to turn more easily. More
friction helps to hold steady course
while cruising or to prevent the
outboard motor from swinging while
trailering the boat.
18
CONTROLS AND FEATURES
Tilt Lever
(gas assist/LH type)
TTIILLTT
RRUUNN ((LLOOCCKK))
TILT LEVER
Moving the tilt lever to the TILT
position allows the motor to be tilted
and moving the tilt lever to the RUN
(LOCK) 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 RUN (LOCK)
position before operating the motor
or the motor could tilt up when
operatinginreverse.
LRT and XRT Types
(remote control/optional
equipment)
For panel mount or top mount remote
control information, refer to the
instructions provided with the remote
control equipment.
Ignition Switch
(side-mount type)
OONN
OOFFFF
IGNITION
SWITCH
EMERGENCY STOP
SWITCH
SWITCH CLIP
SSTTAARRTT
The ignition switch controls the
ignition system and starter motor.
19
CONTROLS AND FEATURES
Turning the ignition switch key to the
START position starts the engine.
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
gearshift/throttle control lever is in
the N (neutral) position (p.), and
40
the switch clip is in the emergency
stop switch.
Turning the ignition switch to the
OFF position stops the engine.
Emergency Stop Switch and
Switch Clip (side-mount type)
EMERGENCY
STOP SWITCH
LANYARD
SWITCH CLIP
LANYARD
SWITCH CLIP
The switch clip must be inserted in
the emergency stop switch in order
for the engine to start and run. The
lanyard must be attached to the
operator’s PFD (Personal Flotation
Device) or worn around the wrist as
shown.
When used as described, the
emergency stop switch and 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.
20
SPARE SWITCH CLIP
CONTROLS AND FEATURES
Fast Idle Lever
(side-mount type)
N (neutral)
GEARSHIFT/THROTTLE
CONTROL LEVER
The fast idle lever is used to set idle
speed during warm-up.
The lever will not move unless the
gearshift/throttle control lever is in
the N (neutral) position. The fast idle
lever must be in it’s lowest position
for you to move the gearshift/throttle
control lever out of neutral.
FAST IDLE
START
FAST IDLE LEVER
Leave the fast idle lever in the
START position to provide a rich
fuel mixture for starting a cold
engine.
Lift the fast idle lever to accelerate
the warm up of a cold engine after
starting and to start a warm engine.
Gearshift/Throttle Control
Lever
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
of the lever handle.
(side-mount type)
GEARSHIFT/THROTTLE
CONTROL LEVER
NEUTRAL
RELEASE
LEVER
21
CONTROLS AND FEATURES
The gearshift/throttle control lever
controls engine speed and selects F
(forward), N (neutral), or R (reverse)
gears.
Moving the control lever 30° from N
(neutral) selects the gear, and further
movement increases engine speed.
A friction adjuster near the base of
the control lever adjusts the operating
resistance of the control lever (p.).
Less friction allows easier control
lever movement. More friction helps
to hold a steady throttle setting while
cruising.
48
EENNGGIINNEE
SSPPEEEEDD
GEARSHIFT/THROTTLE
CONTROL LEVER
N (neutral)
F (forward)R (reverse)
HIGH
30°
30°
EENNGGIINNEE
SSPPEEEEDD
HHIIGGHH
22
CONTROLS AND FEATURES
CONTROL LEVER
Press UP to trim
or tilt the motor
up.
Press DN to trim
or tilt the motor
down.
POWER TRIM/TILT SWITCH
The power trim/tilt switch is located
on the control lever. It is a rocker
switch with UP and DN (down)
positions for changing the angle of
the outboard motor.
You can use the power trim/tilt
switch anytime without turning the
ignition switch ON, whether the boat
is underway or stopped.
Trim the outboard motor to obtain
the best performance and stability
(p.).
50
Tilt the outboard motor for shallow
water operation, beaching, launching,
or mooring.
Power Tilt SwitchPower Trim/Tilt Switch
(LRT and XRT types)(side-mount type)
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
outboard motor.
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.
23
CONTROLS AND FEATURES
Manual Relief ValveEngine Cover Latches
Common Controls
(LRT and XRT types)
FRONT
UNLATCH
ENGINE COVER LATCH
REAR
FFIIXX
ENGINE COVER LATCH
FFIIXX
The engine cover latches fasten the
engine cover to the outboard motor.
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 when no battery is
connected.
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.
UNLATCH
24
CONTROLS AND FEATURES
Transom Angle Adjusting RodTrim Tab
STERN BRACKET
The transom angle adjusting rod
limits the tilt angle of the outboard
TRIM TAB BOLT
motor when fully lowered.
Proper adjustment prevents the
outboard motor from being trimmed
too low (p.).
TTUURRNN UUPP
50
There are five transom angle
adjustment positions. Four are
controlled by the adjusting rod and
PPUUSSHH
TRANSOM ANGLE ADJUSTING ROD
(storage position)
TO CHANGE
UNLOCKED POSITION
the fif th is controlled by the stern
bracket. In order to use the fifth
position, remove the adjusting rod
and store it in the storage location,
then lower the motor down to the
stern bracket stop position.
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 effort is
TO LOCK
LOCKED POSITION
equal in either direction.
TRIM TAB
61
TRANSOM ANGLE ADJUSTING ROD
25
CONTROLS AND FEATURES
INSTRUMENTS
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
proper boat performance.
TachometerFuel Gauge
[optional equipment (LH, LRT
(optional equipment)
and XRT Types)]
FUEL GAUGE
A fuel gauge is built into the cap of
TACHOMETER
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.
the portable fuel tank (optional
equipment).
26
CONTROLS AND FEATURES
INDICATORS
Oil Pressure Indicator
LH Type
(GREEN)
LRTandXRTTypes
(side-mount type)
(GREEN)
BUZZER
When the green light is lit, oil
pressure is OK.
If oil pressure becomes low, the
green light will go off, and the
engine protection system will limit
engine speed. Refer to
CARE OF UNEXPECTED
PROBLEMS
Remote controls are also equipped
with a buzzer that sounds
continuously when the green light
goes off.
The buzzer sound stops below an
engine speed of 1,400 rpm.
Low oil pressure indicates that the
engine oil level is low, or that there is
a problem with the engine lubrication
system.
,onp..
TAKING
91
27
CONTROLS AND FEATURES
Overheat Indicator
LH Type
(RED)
LRTandXRTTypes
(side-mount type)
BUZZER
(RED)
If the engine overheats, the red light
will come on, and the engine
protection system will limit engine
speed.
When normal engine temperature is
restored, the engine speed will
gradually rise to normal engine speed.
If the condition persists for another
20 seconds, the engine will shut off.
Refer to
UNEXPECTED PROBLEMS
p..92
Remote controls are also equipped
with a buzzer that sounds when the
red light comes on.
Engine overheating may be the result
of clogged water intakes.
TAKING CARE OF
,on
28
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