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 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.
The Honda BF5A outboard motor is
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.
6
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.
7
OUTBOARD MOTOR SAFETY
SAFETY LABEL LOCATIONS
FUEL TANK
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.
8
CONTROL AND FEATURE IDENTIFICATION CODES
CONTROLS AND FEATURES
Model
Type
Shaft Length
Refer to this chart for an explanation of the Type Codes used in this manual to identify control and feature applications.
BF5A is provided with the following types
according to the shaf t length.
Shaft Length
S: Short Shaft
L: Long Shaft
SA
S
BF5A
LA
L
(Example)
LA
Destination
A=United States
S=Short Shaft
L=Long Shaft
9
CONTROLS AND FEATURES
COMPONENT AND CONTROL LOCATIONS
GEARSHIFT LEVER
ENGINE COVER
TILT LEVER
TRANSOM ANGLE
ADJUSTING ROD
ANTIVENTILATION
PLATE
PROPELLER
CHOKE KNOB
ENGINE STOP
SWITCH
TILLER
HANDLE
THROTTLE
FRICTION KNOB
SWITCH
CLIP
LANYARD
FUEL HOSE
CONNECTOR
(MALE)
WATER INTAKE PORT
(each side)
OIL FILLER CAP/DIPSTICK
STARTER GRIP
THROTTLE GRIP
OIL PRESSURE
INDICATOR
CLAMP SCREW
STERN BRACKET
STEERING
FRICTION BOLT
GEAR OIL
LEVEL SCREW
GEAR OIL DRAIN/FILL SCREW
SPARK PLUG
ENGINE COVER
LOCK LEVER
COOLING SYSTEM
INDICATOR
ENGINE OIL
DRAIN BOLT
WASH SCREW
(FLUSH SCREW)
ANODE
EXHAUST PORT
10
Portable Fuel Tank
CONTROLS AND FEATURES
FUEL GAUGE
FUEL FILLER CAP
PRIMING BULB
VENT KNOB
FUEL TANK
FUEL HOSE
FUEL HOSE CONNECTOR
(FEMALE)
11
CONTROLS AND FEATURES
CONTROLSChoke Knob
The engine stop switch controls
normal engine stopping and
Switch Clip and Engine Stop
emergency engine stopping.
Switch
ENGINE STOP
SWITCH
PUSH
SWITCH
CLIP
LANYARD
SWITCH CLIP
LANYARD
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.
When used as described, the engine
stop switch and lanyard system stops
the engine if the operator falls away
from the controls.
A spare switch clip is supplied with
the tool kit.
The choke knob opens and closes the
choke valve in the carburetor.
The ON position enriches the fuel
mixture for starting a cold engine.
The OFF position provides the
correct fuel mixture for operation
after starting, and for restarting a
warm engine.
CHOKE KNOB
OOFFFF
OONN
12
CONTROLS AND FEATURES
Throttle GripThrottle Friction KnobGearshift Lever
INDEX MARK
TTOO IINNCCRREEAASSEE
FFRRIICCTTIIOONN
TTOO DDEECCRREEAASSEE
FFRRIICCTTIIOONN
R (reverse)
N(neutral)
F(forward)
THROTTLE GRIP
The throttle grip controls engine
speed.
An index mark on the tiller handle
shows throttle position and is helpf ul
for setting the throttle correctly when
starting (p.).26
THROTTLE
FRICTION KNOB
The throttle friction knob adjusts
resistance to throttle grip rotation.
Turn the knob clockwise to increase
friction for holding a throttle setting
while cruising.
Turn the knob counterclockwise to
decrease friction for easy throttle grip
rotation.
GEARSHIFT LEVER
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.
If the gearshift lever is in the F
(forward) or R (reverse) position, the
recoil starter will not operate.
The transom angle adjusting rod
adjusts the transom angle of the
outboard motor when fully lowered.
Pulling the starter grip operates the
recoil starter to crank the engine for
starting.
The motor will start only when the
gearshift lever (p.) is in the N
26
(neutral) position, and the clip is in
the engine stop switch.
14
The engine cover lock lever fastens
the engine cover to the outboard
motor.
TRANSOM ANGLE ADJUSTING ROD
Proper adjustment prevents the
outboard motor from being adjusted
too low (p.).
33
STEERING FRICTION BOLT
TTOO DDEECCRREEAASSEE
FFRRIICCTTIIOONN
TTOO IINNCCRREEAASSEE
FFRRIICCTTIIOONN
ENGINE COVER GRIP
TILT LEVER
CONTROLS AND FEATURES
INSTRUMENTSSteering Friction BoltTilt Lever
Fuel Gauge
FUEL FILLER CAP
FUEL GAUGE
The steering friction bolt 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.
The tilt lever enables the outboard
motor to be raised for shallow water
operation, beaching, launching, or
mooring.
To tilt, raise the outboard motor by
pulling on the cover grip until the tilt
mechanism engages at 30°, 45°, or
70° (p.and).3435
A fuel gauge is built into the cap of
the portable fuel tank.
15
CONTROLS AND FEATURES
INDICATORS
Oil Pressure Indicator
OIL PRESSURE INDICATOR
When the oil pressure indicator is lit,
oil pressure is OK.
If oil pressure becomes low, the oil
pressure indicator will go off, and the
engine protection system will limit
engine speed. Refer to
CARE OF UNEXPECTED
PROBLEMS
Low oil pressure indicates that the
engine oil level is low, or that there is
a problem with the engine lubrication
system.
,p..68
TAKING
Cooling System IndicatorOTHER FEATURES
Overrev Limiter
The engine is equipped with an
overrev limiter to prevent the
possibility of mechanical damage
from excessive engine speed.
The overrev limiter may be activated
during operation, limiting engine
speed, if the outboard motor is tilted
COOLING SYSTEM INDICATOR
Water should flow from the cooling
system indicator while the engine is
running. This shows that water is
circulating through the cooling
system.
If water stops flowing while the
engine is running, that indicates a
cooling system problem, such as
clogged water intakes, which will
cause engine overheating.
excessively, or when propeller
ventilation occurs during a sharp turn.
If the overrev limiter is activated,
check the tilt angle of the outboard
motor.
Improper propeller selection may
also cause the overrev limiter to
activate.
Check to see if the correct propeller
is installed.
16
CONTROLS AND FEATURES
Portable Fuel TankAnodeFuel Filler Cap Vent Knob
ANODE
The anode is made of a sacrificial
material that helps to protect the
outboard motor from corrosion.
There is an anode on the
antiventilation plate.
The portable fuel tank has a capacity
ofUS gal () and has a fuel
3.212
gauge built into the cap.
VENT KNOB
CLOSE
OOPPEENN
FUEL FILLER CAP
The cap is provided with a vent knob
to seal the portable fuel tank for
carrying it to and from the boat.
Open the vent knob 2 or 3 turns
before starting the engine.
17
CONTROLS AND FEATURES
Fuel Priming Bulb
UP
OUTLET END
(MOTOR)
PRIMING BULB
INLET END
(TANK)
A priming bulb is built into the fuel
hose that connects the fuel tank to the
outboard motor.
Before starting the engine, hold the
priming bulb up in the direction of
the arrow, then squeeze the priming
bulb until it feels firm. This will
ensure that fuel is supplied to the
engine.
18
INSTALLATION
Correct and secure installation is
essential for safe boating and good
performance. Follow the installation
instructions provided in this manual.
POWER REQUIREMENTS
Before installation, check to be sure
that the outboard motor does not
exceed the recommended maximum
horsepower for the boat on which it
is to be installed. Refer to the boat’s
certification plate for recommended
maximum horsepower. If the
certification plate information is not
available, contact the boat dealer or
manufacturer.
For most applications, the outboard
motor should have a horsepower
rating which provides 80% of the
maximum recommended horsepower
for the boat.
INSTALLATION POSITION
CENTER LINE
Install the outboard motor on the
center of the boat transom.
The antiventilation plate of the
outboard motor should be 02 in
−
(050 mm) below the bottom of
the boat. When the outboard motor is
mounted on a sailboat, the
antiventilation plate should be 5.9 in
(150 mm) or more below the surface
of the water. For unusual situations,
see your Honda marine dealer for
advice.
The correct dimensions differ
according to the type of boat and the
configuration of the bottom of the
boat. Follow the manufacturer’s
recommended installation height.
−
IDLE PORT
BBOOAATT
TTRRAANNSSOOMM
HHEEIIGGHHTT
02in
−
(0 50 mm)
−
ANTIVENTILATION PLATE
Type:
S:
L:
Motor Transom Height
17.1 in (434 mm)
22.1 in (561 mm)
MMOOTTOORR
TTRRAANNSSOOMM
HHEEIIGGHHTT
5.9 in
(150 mm)
WATER
SURFACE
When the outboard motor is installed
extremely low, the idle port may be
immersed and the engine may
become hard to start or may run
poorly. Check that the idle port is
high enough from the water level
when the engine is stopped with the
boat fully loaded.
19
INSTALLATION
If the outboard motor is installed too
low, the boat will squat and be hard
to plane, and the motor will spray
water that may enter the boat. It will
tend to porpoise, and high-speed
stability will be reduced.
If the outboard motor is installed too
high, that will cause propeller
ventilation.
Optimum installation height varies
with boat type and bottom shape.
Contact the boat manufacturer for
any special recommendations that are
unique to a specific model of boat.
If the transom needs to be modified
to accommodate the outboard motor,
contact the boat manufacturer and
follow their recommendations for
corrective action.
ATTACHMENTTRANSOM ANGLE
ADJUSTMENT
Use the transom angle adjustment rod
(p.) to adjust the angle of the
23
outboard motor so the propeller is
perpendicular to the surface of the
water.
STERN
BRACKET
SAFETY ROPECLAMP SCREWS
Attach the stern bracket to the boat
transom by tightening the clamp
screws.
Attach a rope from the boat to the
hole in the stern bracket. This will
help to prevent accidental loss of the
outboard motor.
20
BEFORE OPERATION
ARE YOU READY TO GET
UNDER WAY?
Your safety is your responsibility. A
little time spent in preparation will
significantly reduce your risk of
injury.
Knowledge
Read and understand this manual.
Know what the controls do and how
to operate them.
Familiarize yourself with the
outboard motor and its operation
before you get under way. Know
what to do in case of emergencies.
Familiarize yourself with all laws
and regulations relating to boating
and the use of outboard motors.
Safety
Always wear a PFD (Personal
Flotation Device) while on the boat.
Attach the emergency stop switch
lanyard securely to your PFD or to
your wrist.
IS YOUR OUTBOARD
MOTOR READY TO GO?
For your safety, and to maximize the
service life of your equipment, it is
very important to take a few
moments before you operate the
outboard motor to check its condition.
Be sure to take care of any problem
you find, or have your authorized
Honda marine dealer correct it,
before you operate the outboard
motor.
Improperly maintaining
this outboard motor, or
failing to correct a problem
before operation, can cause
a malfunction in which you
could be seriously hurt or
killed.
Always perform a preoperation inspection before
each operation, and correct
any problem.
Before beginning your pre-operation
checks, be sure the switch clip is
removed from the engine stop switch.
21
BEFORE OPERATION
Safety InspectionMaintenance Inspection
Look around the outboard motor
for signs of oil or gasoline leaks.
If you are using the portable fuel
tank, make sure it is in good
condition and properly secured in
the boat (p.).
Check that the fuel hose is
undamaged and properly
connected (p.).
Wipe up any spills before starting
the engine.
Check the stern bracket to be sure
the outboard motor is securely
installed.
Check that all controls are
operating properly.
Replace any damaged parts.
Check that all fasteners are in
place and securely tightened.
24
24
Check the engine oil level (p.).
Running the engine with a low oil
level can cause engine damage.
Check to be sure the propeller and
shear pin are undamaged (p.).
Check that the anode is securely
attached to the antiventilation plate
(p.) and is not excessively
53
worn. The anode helps to protect
the outboard motor from corrosion.
Make sure the tool kit and
emergency starter rope are
onboard (p.). Replace any
missing items.
Check the fuel level in the fuel
tank (p.).
38
48
41
54
22
OPERATION
SAFE OPERATING
PRECAUTIONS
To safely realize the full potential of
this outboard motor, you need a
complete understanding of its
operation and a certain amount of
practice with its controls.
Before operating the outboard motor
for the first time, please review the
IMPORTANT SAFETY
INFORMATION
chapter titled
For your safety, avoid starting or
operating the engine in an enclosed
area. Your engine’s exhaust contains
poisonous carbon monoxide gas
which can collect rapidly in an
enclosed area and cause illness or
death.
on pageand the
6
BEFORE OPERATION.
BREAK-IN PROCEDURE
Proper break-in procedure allows the
moving parts to wear in smoothly for
best performance and long service
life.
For the first 10 hours, run the
outboard motor at low speed, and
avoid full-throttle operation.
TRANSOM ANGLE
ADJUSTMENT
TRANSOM ANGLE
ADJUSTING ROD
TO CHANGE
TO LOCK
LOCKED POSITION
UNLOCKED
POSITION
The transom angle adjusting rod is
used to adjust the angle of the
outboard motor in the normal
operating position (p.).
To adjust, first tilt the outboard
1.
33
motor so it is not resting on the rod.
Push the rod in and turn the end of
2.
the rod up, so the latch will fall
into line with the rod.
Remove the rod and reinsert it in
3.
the desired position.
Push the rod in and turn the end of
4.
the rod down, so the latch will fall
to the locked position. Then
release the rod.
23
OPERATION
PORTABLE FUEL TANKFUEL HOSE CONNECTIONS
Secure the portable fuel tank in the
boat, so it won’t move around and
become damaged.
FUEL HOSE CONNECTOR
Before use, open the fuel tank vent
by turning the vent knob at least 2 or
3 turns counterclockwise.
Gasoline is highly
flammable and explosive.
(FUEL TANK SIDE)
You can be burned or
Place the portable fuel tank in a wellventilated location, away from direct
seriously injured when
handling fuel.
sunlight, to reduce the possibility of a
gasoline vapor explosion.
Stop the engine and keep
heat, sparks, and flame
To ensure that the outboard motor
will be able to draw fuel from the
tank, place the tank within 6 feet of
the outboard motor and not more
than 3 feet below the fuel connector
on the outboard motor.
away.
Handle fuel only
outdoors.
Wipe up spills
immediately.
FUEL HOSE CONNECTOR
(OUTBOARD MOTOR SIDE)
Connect the fuel hose to the tank and
the outboard motor, as shown. Be
sure both connectors snap securely
into place.
24
OPERATION
FUEL PRIMINGSTARTING THE ENGINE
SWITCH CLIP
UP
OUTLET END
(MOTOR)
PRIMING BULB
INLET END
(TANK)
Hold the priming bulb up in the
direction of the arrow, then squeeze
the priming bulb several times until it
feels firm, indicating that fuel has
reached the engine.
Check to be sure there are no fuel
leaks before starting the engine.
Do not touch the priming bulb with
the engine running or when tilting up
the outboard motor. The carburetor
could overflow.
LANYARD
Put the emergency stop switch clip
1.
in the engine stop switch, and
attach the lanyard to your PFD
(Personal Flotation Device) or to
your wrist.
ENGINE STOP
SWITCH
The engine will not start or run
unless the clip is in the switch.
The emergency stop switch clip
and lanyard system is a safety
device that will stop the engine if
you fall away from the controls
while operating the boat.
Always attach the lanyard to your
PFD, or to your wrist, before
starting the engine.
25
OPERATION
N (neutral)
CHOKE KNOB
MARK
OOFFFF
GEARSHIFT LEVER
Check the position of the gearshif t
2.3.4.
lever. It must be in the N (neutral)
position for starting.
To start a cold engine, pull the
choke knob to the ON position. To
restart a warm engine, leave the
OONN
choke knob in the OFF position.
The engine will not start if the
gearshift lever is in the F (forward)
or R (reverse) position.
26
THROTTLE GRIP
Align the START position with
the mark for starting the engine.
OPERATION
Direction to pull
STARTER GRIP
Pull the starter grip lightly until
5.
you feel resistance, then pull
briskly in the direction of the
arrow as shown above.
Return the starter grip gently.
If the choke knob was pulled to
6.
the ON position to start the engine,
gradually push it to the OFF
position as the engine warms up.
Also, as the engine warms up, the
throttle grip can be turned to the
SLOW position without stalling.
Before getting under way, allow
7.
the engine to warm up sufficiently
to ensure good performance.
During the warm-up period, check
the oil pressure indicator (p.)
and cooling system indicator
(p.).
16
If the indicators show any
abnormal condition, immediately
stop the engine and determine the
cause of the problem. Refer to
TAKING CARE OF
UNEXPECTED PROBLEMS
p.and.
6866
16
on
EMERGENCY STARTING
If the recoil starter is inoperative, you
can start the engine manually using
the emergency starter rope supplied
with the tool kit.
ENGINE COVER LOCK LEVER
UNLOCK
Unlock and remove the engine
1.
cover.
27
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