This manual describes the operation
and maintenance of the Honda
BF 75A and BF 90A Outboard
Motors.
All information in this publication is
based on the latest product information available at the time of printing.
Honda Motor Co., Ltd. reserves the
right to make changes at any time
without notice and without incurring
any obligation.
No part of this publication may be
reproduced without written
permission.
This manual should be considered a
permanent part of the Outboard Motor
and it must stay with the Outboard
Motor if resold.
SAFETY MESSAGES
Your safety and the safety of others are
very important. We have provided
important safety messages in this
manual and on the outboard motor.
Please read these messages carefully.
A safety message alerts you to potential hazards that can hurt you and
others. Each safety message is preceded
by a safety alert symbol A and one of
three words: DANGER, WARNING,
or CAUTION.
These mean:
B
KILLED or SERIOUSLY HURT
if you don’t follow instructions.
KILLED or SERIOUSLY HURT
if you don’t follow instructions.
-
if you don’t follow instructions.
You WILL be
You CAN be
You CAN be HURT
Each message tells you what the hazard
is, what can happen, and what you can
do to avoid or reduce injury.
DAMAGE PREVENTION
MESSAGES
You will also see other important
messages that are preceded by the
word NOTICE.
This word means:
NOTICE Your outboard
or
other
property can
if you don’t follow instructions.
The purpose of these messages is to
help prevent damage to your outboard
motor, other property, or the
environment.
HONDA MOTOR CO., LTD. 1995
ALL RIGHTS RESERVED
motor
be damaged
1
TYPES OF HONDA BF75AIBOA OUTBOARD MOTORS
It may be necessary to refer to this chart for reference purposes when reading this manual.
TYPE CODE (example)
LRT
T=Power Trim /Tilt R=Remote Control H=Tiller Handle
X=Extra Long Shaft L=Long Shaft
TT,
2
IDENTIFICATION NUMBERS
LEFTSTERNBRACKET
PRODUdT IDENTIFICATION NUMBER
The Product Identification Number is
stamped on a plate and attached to the
left stern bracket.
Product identification number:
Record the Product Identification
Number (P.I.N.) and the Engine Serial
Number for your reference. Refer to
the Product Identification Number
when ordering parts, and when mak-
ing technical or warranty inquiries
(see page 136).
ENGIN’E SERIAL NUMBER
The Engine Serial Number is stamped
on the cylinder block in the front of
the engine.
Engine serial number:
CONTENTS
1. SAFETY
SAFETY LABELS.. ...................
SAFETY INFORMATION.. ......
2. COMPONENT IDENTIFICATION ...
3. CONTROLS & INSTRUMENTS
TILLER HANDLE TYPE
Ignition Switch ...........................
Gear Shift Lever..
.......................
Choke Knob ................................
Throttle Grip.. .............................
Throttle Opening Indicator.. .......
Throttle Friction Knob ...............
Engine Stop Switch ....................
Emergency Stop Switch Lanyard . .
Oil Pressure Indicator Light .......
Overheat indicator Light ............
Power Trim/Tilt Switch.. ............
Steering Friction Adjuster ..........
REMOTE CONTROL TYPE
(SIDE-MOUNT TYPE)
Remote Control Lever.. ..............
Neutral Release Lever ................
Ignition Switch ...........................
Emergency Stop Switch Lanyard . .
Choke/Fast Idle Lever
................
Manual Choke Knob ..................
Oil Pressure Indicator Light/Buzzer ....
Overheat Indicator Light/Buzzer ...
Power Trim/Tilt Switch.. ............
14
I4
I4
I5
I5
15
16
I6
17
I7
18
18
I9
20
20
;:
22
23
23
24
6
7
8
(PANEL-MOUNT TYPE)
Remote Control Lever.. .............. 25
Nertral Release Lever.. ............... 26
Ignition Switch ........................... 26
Emergency Stop Switch Lanyard 27
Throttle Button ........................... 28
Choke Switch ............................. 28
Manual Choke Knob .................. 28
Oil Pressure Indicator Light/Buzzer .... 29
Overheat Indicator Light/Buzzer.. .... 29
Power Trim/Tilt Switch.. ............ 30
(TOP-MOUNT TYPE)
Remote Control Lcvcr ................ 3 I
Ignition Switch ........................... 32
Emergency Stop Switch Lanyard 33
Throttle Button ........................... 34
Choke Switch ............................. 34
Manual Choke Knob .................. 34
Oil Pressure Indicator Light/Buzzer .... 35
Overheat Indicator Light/Buzzer.. . 35
Power Trim/Tilt Switch
(remote control lever). . 36
Power Trim/Tilt Switch
(control box console). .. 36
COMMON
Power Tilt Switch (engine pan). . 37
Trim Meter.. ...................................... 37
These labels are in the locations
shown. They warn you of potential
hazards that could seriously injure
you. Read these labels carefully.
FUEL TANK
SAFETY INFORMATION
For your safety and the safety of others, pay special attention to these precautions.
Operator Responsibility
l
Know how to stop the engine
quickly in case of emergency.
Understand the use of all controls.
l
Do not exceed the boat manufacturer’s power recommendation, and be
sure that the outboard motor is
properly mounted.
l
Never permit anyone to operate the
outboard motor without proper
instruction.
l
Stop the engine immediately if any
one falls overboard.
l
Do
not run the engine while the
boat is near anyone in the water.
l
Attach the emergency stop switch
lanyard securely to the operator.
l
Do not remove the engine cover
while the engine is running.
l
Before operating the outboard
motor, familiarize yourself with all
laws and regulations relating to
boating and the use of outboard
motors.
l
Do not attempt to modify the outboard motor.
l
Always wear PERSONAL
FLOTAmON DEVICE (PFD) when
on board.
l
Do not remove any guards, labels,
shields, covers or safety devices;
they are installed for your safety.
Fire and Burn Hazards
Gasoline is extremely flammable, and
gasoline vapor can explode. Use
extreme care when handling gasoline.
l
Remove any portable fuel tank from
the boat for refueling.
l
Refuel in a well-ventilated area
with the engine stopped. Keep
flames and sparks away, and do not
smoke in the area.
1. SAFETY
l
Refuel carefully to avoid spilling
fuel. Avoid overfilling the fuel tank
(there should be no fuel in the filler
neck). After refueling, tighten the
filler cap securely. If any fuel is
spilled, make sure the area is dry
before starting the engine.
2. COMPONENT IDENTIFICATION (TILLER HANDLE TYPE)
THROTTLE
POWER TILT
VALVE
ANODE METAL
TRANSOM ANG
ADJUSTING RO
REAR VENT
PLUG
8
GRIP
/
GEAR OIL
DRAIN PLUG
ENGINE COVER
LOCK LEVER
WASH PLUG
‘I-VENTILATION
NODE METAL
\
EXHAUST PORT
ENGINE OIL
DRAIN BOLT
ACCESS COV
L HOSE CONNECTOR
HROTTLE FRICTION KNOB
NITION SWITCH
\
WATER INTAKE
HIFT LEVER
SPARE EMERGENCY
STOP SWITCH CLIP
\
2. COMPONENT IDENTIFICATION (TILLER HANDLE TYPE)
OIL PRESSURE
INDICATOR LIGHT
I
EMERGENCY
STOP
SWITCH
THROTTLE
FRICTION KNOB
IGNIilON
SWITCH
I
EMERGENCY
STOP SWITCH
CLIP
LEVER
POWER TRIM/TILT
SWITCH
9
2. COMPONENT IDENTIFICATION (REMOTE CONTROL TYPE)
OIL
ENGINE COVER
POWER TILT SWITCH
yfr;EAL RELIEF
ANODE
METAL
TRANSOM ANGLE
ADJUSTING ROD
CHECK PLU
\
ENGINE COVER
LOCK LEVF:R
WASH PLUG
ANTI-VENTILATION
ANODE METAL
LEVEL DIPSTICK
ENGINE OIL
DRAIN BOLT
ACCESS COV
\
OIL FILLER CAP
REAR VENT PLUG
10
WATER INTAKE
2. COMPONENT IDENTIFICATION (REMOTE CONTROL TYPE1
(SIDE-MOUNT REMOTE CONTROL)
POWER TRIM/TILT
SWITCH
\
(INSIDE)
REMOTE CONTROL
FRICTION ADJUSTE
SWITCH LANYARD
EMERGENCY STOP
SWITCH CLIP
NEUTRAL
RELEASE
LEVER
OVERHEAT
INDICATOR LIGHT
I
NLY
ITCH
(PANEL-MOUNT REMOTE CONTROL)
POWER TRIM/TILT
SWITCH
EMERGENCY
STOP SWITCH B
11
2. COMPONENT IDENTIFICATION (REMOTE CONTROL TYPE)
(SINGLE TOP-MOUN’I
REMOTE CONTROL)
POWER TRIM/TILT
SWITCH \
CONTROL PANEL
(for PANEL/TOP-
MOUNT type)
IGNITION
SWITCH
(DUAL TOP-MOUNT
REMOTE CONTROL)
EMERGENCY
&-g&H
. CONTROL LEVER
POWER TRIM/TILT
SWITCH
(RIGHT INDIVIDUAL
ADJUSTMENT)
POWER TRIWILT
SWITCH
(LEFT INDIVIDUAL
ADJUSTMENT)
12
2. COMPONENT IDENTIFICATION (COMMON)
FUEL TANK (optional equipment)
FUEL TANK
(optional equipment)
FUEL
FUEL HOSE CONNECTOR
I
PRIMER BULB
(female)
FUEL G\AUGE
VENT KNOB
/
METER
TRIM METER
TACHOMETER
(optional equipment)
13
3. CONTROLS (TILLER HANDLE TYPE)
Ignition Switch
IGNITION SWITCH
START ON
Move the gearshift lever to the N
(neutral) position before starting. The
engine will not start unless the
gearshift lever is in the N (neutral)
position.
Gear Shift Lever
GEAR SHIFT LEVER
There are three gearshift lever posi-
tions.
F (forward): The boat moves forward.
N (neutral): The transmission gears
are disengaged from the
engine.
R (reverse): The boat reverses.
Choke Knob
CHOKE KNOB
When the engine is cold, pull the
choke knob. A rich fuel mixture is
provided to the engine by pulling the
choke knob.
14
3. CONTROLS (TILLER HANDLE TYPE)
Throttle Grip
THROTTLE GRIP
Turn the grip clockwise or counterclockwise to adjust the engine speed.
Turning the grip in the direction
shown by the arrow increases engine
speed.
Throttle Opening Indicator
THROTTLE OPENING INDICATOR
The curve on the grip label indicates
throttle opening.
Throttle Friction Knob
THROTTtE FRICTION KNOB
Use the throttle friction knob to set the
throttle grip at a certain position while
cruising. Turning the friction knob
clockwise sets the throttle grip, and it
is released by turning the friction knob
counterclockwise.
15
I
3. CONTROLS (TILLER HANDLE TYPE)
Emergency Stop Switch
ST0
STOP SWITCH
LANYARD \
\
The emergency stop switch lanyard is
provided to stop the engine immediately in the event the operator should
fall overboard or away from the controls.
Emergency Stop Switch Lanyard
EMEdGENCY STOP SWITCH CLIP
The emergency stop switch clip must
be engaged with the emergency stop
switch or the engine will not start.
When
the emergency stop switch clip
becomes disengaged with the emergency stop switch, the engine will
stop immediately.
EMERGENCY STOI; SWITCH LANYARD
Attach the emergency stop switch lanyard securely to the operator when
operating the outboard motor.
16
3. CONTROLS (TILLER HANDLE TYPE)
SPARE EMERGENCY
STOP SWITCH CLIP
A spare emergency stop switch clip is
provided near the ignition
switch.
Oil Pressure Indicator Light
OIL PRESSURE INDICATOR LIGHT
The green oil pressure indicator light
is normally ON when the outboard
motor is running.
When the engine oil level is low or the
engine lubrication system is faulty, the
green oil pressure indicator ,light turns
OFF and the engine speed decreases
gradually.
Overheat Indicator Light
OVER HEAT INDICATOR LIGHT
When there is a cooling system pro-
blem, the
red overheat indicator light
turns ON and the engine speed
decreases gradually.
17
3. CONTROLS (TILLER HANDLE TYPE)
Power Trim/Tilt Switch
Power Trim
Press the power trim/tilt switch on the
tiller handle to adjust the motor trim
angle from 0” to 20” to maintain
proper boat trim. The power trim/tilt
switch located on the tiller handle can
be operated while the boat is under
way or while stopped.
By using the power trim/tilt switch
the operator can change the trim
angle of the motor to achieve maximum
boat acceleration, speed, stability and
maintain optimum fuel consumption.
Power Tilt
Press the power trim/tilt switch on the
tiller handle to adjust the motor tilt
angle from 20” to 72”.
By using the power trim/tilt switch the
operator can change the tilt angle of
the motor for shallow water operation,
beaching, launching from a trailer, or
mooring.
POWER
TRIM/TILT
SWITCH
Excessive trim/tilt angle during
operation can cause the propeller
to raise out of the water and cause
propeller ventilation and engine
over-revving. Excessive trim/tilt
angle can also damage the water
pump.
Steering Friction Adjuster
The steering friction adjuster adjusts
the tightness of the steering
movement.
18
(SIDE-MOUNT TYPE)
Remote Control Lever
NEUTRAL RELEASE
3. CONTROLS (REMOTE CONTROL TYPE)
OPENING
THROTTLE OPENlN
REMOTE CONTROL LEYER
The remote control lever controls gear
selection and throttle opening posi-
tions.
It is necessary to pull up the neutral
release lever to operate the remote
control lever.
F (forward):
Moving the lever to the F position
(approximately 30” from the N
position) will engage the forward
gear. Moving the lever farther into
the F position will increse the
throttle opening and the boat’s for-
ward speed.
N (neutral):
The engine idles and the transmission gears are disengaged.
R (reverse):
Moving the lever to the R position
(approximately 30” from the N
position) will engage the reverse
gear. Moving the lever farther into
the R position will increase the
throttle opening and the boat’s
reverse speed.
19
3. CONTROLS (REMOTE CONTROL TYPE)
Neutral Release Lever
The neutral release lever is on the
remote control lever to prevent an
accidental gear engagement.
The remote control lever will not
engage forward or reverse gear. unless
the neutral release lever is pulled up.
Ignition Switch
The remote control box is equipped
with a key-type ignition switch.
Key positions:
START
To activate the starter motor and start
the engine (the remote control lever
must be in the neutral position).
ON
To run the engine after starting (the
battery will discharge if the key is
left in this position with the engine
not running).
OFF
To stop the engine (IGNITION
OFF).
To prevent the battery from discharging, keep the key in the OFF
position when the engine is not running.
20
Emergency Stop Switch Lanyard
EMERGENCY
3. CONTROLS (REMOTE CONTROL TYPE)
SWITCH CLIP
The emergency stop switch lanyard is
provided to stop the engine immediately in the event the operator falls
overboard or away from the controls.
The emergency stop switch clip must
be engaged with the emergency stop
switch, or the engine will not start.
When the emergency stop switch clip
becomes disengaged from the emergency stop switch, the engine
will stop immediately.
Y
SWITCH LANYARD
The emergency engine stop switch
should not he used to normally stop
the engine. Use the ignition switch to
normally stop the engine.
Attach the emergency stop switch lanyard securely to the operator when
operating the outboard motor.
SPAkE EMERGENCY
STOP SWITCH CLIP
A spare emergency stop switch clip is
provided on the remote control box.
21
3. CONTROLS (REMOTE CONTROL TYPE)
Choke/Fast Idle
Lever
The choke/fast idle lever provides two
functions:
1. Electric choke solenoid activation
for easy engine start up.
2. Engine fast idle.
The choke/fast idle lever will not
move unless the remote control lever
is in the N (neutral) position.
Conversely, the remote control lever
will not move unless the choke/fast
idle lever is in the lowest position.
/+MAXIMUM FAST IDLE
OWEST POSITION
CHOKE/FAST
Raise the choke/fast idle lever, and
hold it all the way up to provide a
rich fuel mixture and maximum fast
idle.
IDLE LEVER
Gradually lower the choke/fast idle
lever to the lowest position to decrease
the choke and fast idle.
Manual Choke Knob
CHOKE KNOB
A
manual choke knob is located on
the right side of the motor, which can
be used in the event the battery is discharged.
and a rich fuel mixture will be provided to the engine.
Pull the manual
choke knob,
22
3. CONTROLS (REMOTE CONTROL TYPE)
Oil Pressure Indicator Light/Buzzer
The green oil pressure indicator light
turns OFF and the buzzer sounds
when the oil level is low and/or the
engine lubrication system is faulty.
The engine speed slows down gradual-
lY*
Overheat Indicator Light/Buzzer
The red
ON and
is a cooling system problem. The
engine speed slows down gradually.
overheat indicator light turns
the buzzer sounds when there
23
3. CONTROLS (REMOTE CONTROL TYPE)
Power
‘Rim/Tilt Switch
Power Trim
Press the power trim/tilt switch on the
remote control to adjust the
motor trim angle from 0” to 20” to
maintain proper boat trim. The power
trim/tilt switch located on the remote
control lever can be operated while the
boat is under way or while stopped.
By using the power trim/tilt switch,
the operator can change the trim angle
of the motor to achieve maximum
boat acceleration, speed, stability and
maintain optimum fuel consumption.
TRIM
ANGLE
Power Tilt
Press the power trim/tilt swich on the
remote control lever to adjust the
motor tilt angle from 20” to 72”.
By using the power trim/tilt switch,
the operator can change the tilt angle
of the motor for shallow water operation, beaching, launching from a
trailer, or mooring.
CONTROL
LEVER
(NOTICE]
Excessive trim/tilt angle during
operation can cause the propeller
to raise out of the water and cause
propeller ventilation and engine
over-revving. Excessive trim/tilt
angle can also damage the water
pump.
24
(PANEL-MOUNT TYPE)
Remote Control Lever
AL RELEASE
3. CONTROLS (REMOTE CONTROL TYPE)
THROTTLE OPENING
THROTTLE OPENING
The remote control lever controls gear
selection and throttle opening positions.
It is necessary to pull up the neutral
release lever to operate the remote
control lever.
MAXIMUM ’
REMOTE CONTROL LEVER
F (forward):
Moving the lever to the F position
(approximately 35” from the N
position) will engage the forward
gear. Moving the lever farther into
the F position will increse the
throttle opening and the boat’s forward speed.
N (neutral):
The engine idles and the transmission gears are disengaged.
I
R (reverse):
Moving the lever to R position
(approximately 35” from the N
position) will engage the reverse
gear. Moving the lever farther into
the R position will increase the
throttle opening and the boat’s
reverse speed.
25
3. CONTROLS (REMOTE CONTROL TYPE)
Neutral Release Lever
NEUTRAL RELEASE
LEVER
The neutral release lever is on the
remote control lwer to prevent an
accidental gear engagement.
The remote control lever will not
engage forward or reverse gear, unless
the neutral release lever is pulled up.
Ignition Switch
START
The switch panel is equipped with a
key-type ignition switch.
Key positions:
START
To activate the starter motor and start
the engine (the remote control lever
must be in the neutral position).
ON
To run the engine after starting (the
battery will discharge if the key is
left in this position with the engine
not running).
OFF
To stop the engine (IGNITION
OFF).
To prevent the battery from dis-
charging, keep the key in the OFF
position when the engine is not run-
ning.
26
Emergency Stop Switch Lanyard
EMERGENCY
STOP
SWITCH
The emergency stop switch lanyard is
provided to stop the engine immediately in the event the operetor falls
overboard or away from the controls.
3. CONTROLS (REMOTE CONTROL TYPE)
EMERGEkCY STOP SWITCH
LANYARD
The emergency engine stop switch
should not he used to normally stop
the engine. Use the ignition switch to
normally stop the engine.
SPARE EMERGENCY
STOP SWITCH CLIP
A spare emargency switch clip is
provided in the tool bag.
The emergency stop switch clip must
be engaged with the emergency stop
switch, or the engine will not start.
When the emergency stop switch clip
becomes disengaged from the emergency stop switch, the engine will
stop immediately.
Attach the emergency stop switch lan-
yard securely to the operator when
operating the outboard motor.
27
3. CONTROLS (REMOTE CONTROL TYPE)
Throttle Button
N
(Neutral)
l ..**ljsckword
By moving the control lever forward
or backward when the throttle button
is pushed in, the throttle opening will
be increased without engaging the gears.
It is necessary to position the control
lever in N (neutral) to push in the
throttle button.
Choke Switch
When the engine is cold, put the
choke switch “ON”. A rich fuel
mixture will be provided to the engine.
Manual Choke Knob
CHOKi KNOB
A manual choke knob is located on
the right side of the motor, which can
be used in the event the battery is dis-
charged. Pull the manual choke knob,
and a rich fuel mixture will be provid-
ed to the engine.
28
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