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- BF 50A
- Owner's manual
- 111 Pages
TECHNICAL AND CONSUMER INFORMATION. Honda BF 50A, BF 40A 111 Pages
Below you will find brief information for Outboard motor BF 40A, Outboard motor BF 50A. This manual will guide you through the basic operation and maintenance of your new outboard motor. It covers everything from starting the engine to performing routine maintenance, ensuring you get the most out of your boating experience.
TECHNICAL AND CONSUMER INFORMATION. Honda BF 50A, BF 40A
Below you will find brief information for Outboard motor BF 40A, Outboard motor BF 50A. This manual will guide you through the basic operation and maintenance of your new outboard motor. It covers everything from starting the engine to performing routine maintenance, ensuring you get the most out of your boating experience.
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TECHNICAL AND CONSUMER INFORMATION
TECHNICAL INFORMATION
Serial Number Locations
Record the product identification number and engine serial numbers in the space provided on this page. You will need these numbers when ordering parts, and when making technical or warranty inquiries (p.
RIGHT STERN BRACKET
PRODUCT IDENTIFICATION
NUMBER
The product identification number is stamped on a plate attached on the right stern bracket.
Product identification number:
STARTER MOTOR
ENGINE SERIAL NUMBER
The engine serial number is stamped on the cylinder block under the starter motor which is located in the front of the engine.
Engine serial number:
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TECHNICAL AND CONSUMER INFORMATION
Carburetor Modification for
High Altitude Operation
At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel consumption will increase.
A very rich mixture will also foul the spark plugs and cause hard starting.
High altitude performance can be improved by specific modifications to the carburetors. If you always operate your outboard motor at altitudes above 5,000 feet (1,500 meters), have an authorized Honda marine dealer perform this carburetor modification.
Even with carburetor modification, engine horsepower will decrease about 3.5% for each 1,000-foot (300meter) increase in altitude. The effect of altitude on horsepower will be greater than this if no carburetor modification is made.
When the carburetors have been modif ied f or high altitude operation, the air-f uel mixture will be too lean f or low altitude use. Operation at altitudes below 5,000 f eet (1,500 meters) with modif ied carburetors may cause the engine to overheat and result in serious engine damage.
For use at low altitudes, have an authorized Honda Marine dealer return the carburetors to original f actory specif ications.
Battery
For complete information, refer to the battery manufacture’s instructions.
Minimum Requirements
12V − 70AH
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TECHNICAL AND CONSUMER INFORMATION
Oxygenated Fuels
Some conventional gasolines are being blended with alcohol or an ether compound. These gasolines are collectively referred to as oxygenated fuels. To meet clean air standards, some areas of the United States and
Canada use oxygenated fuels to help reduce emissions.
If you use an oxygenated fuel, be sure it is unleaded and meets the minimum octane rating requirement.
Before using an oxygenated fuel, try to confirm the fuel’s contents. Some states/provinces require this information to be posted on the pump.
The following are the EPA-approved percentages of oxygenates:
ETHANOL: ethyl or grain alcohol;
10% by volume.
You may use gasoline containing up to 10% ethanol by volume. Gasoline containing ethanol may be marketed under the name ‘‘Gasohol’’.
MTBE: Methyl Tertiary Butyl Ether;
15% by volume.
You may use gasoline containing up to 15% MTBE by volume.
METHANOL: methyl or wood alcohol; 5% by volume.
You may use gasoline containing up to 5% methanol by volume, as long as it also contains cosolvents and corrosion inhibitors to protect the fuel system. Gasoline containing more than 5% methanol by volume may cause starting and/or performance problems. It may also
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damage metal, rubber, and plastic parts of your fuel system.
If you notice any undesirable operating symptoms, try another service station, or switch to another brand of gasoline.
Fuel system damage or performance problems resulting from the use of an oxygenated fuel containing more than the percentages of oxygenates mentioned above are not covered under warranty.
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TECHNICAL AND CONSUMER INFORMATION
Emission Control System
Information
Source of Emissions
The combustion process produces carbon monoxide, oxides of nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of nitrogen is very important because, under certain conditions, they react to form photochemical smog when subjected to sunlight. Carbon monoxide does not react in the same way, but it is toxic.
Honda utilizes lean carburetor settings and other systems to reduce the emissions of carbon monoxide, oxides of nitrogen, and hydrocarbons.
The U.S. and Calif ornia Clean
Air Acts
EPA and California regulations require all manufacturers to furnish written instructions describing the operation and maintenance of emission control systems.
The following instructions and procedures must be followed in order to keep the emissions from your
Honda engine within the emission standards.
Tampering and Altering
Tampering with or altering the emission control system may increase emissions beyond the legal limit.
Among those acts that constitute tampering are:
Removal or alteration of any part of the intake, fuel, or exhaust systems.
Alterations that would cause the engine to operate outside its design parameters.
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TECHNICAL AND CONSUMER INFORMATION
Problems That May Af f ect
Emissions
If you are aware of any of the following symptoms, have your engine inspected and repaired by your servicing dealer.
Hard starting or stalling after starting.
Rough idle.
Misfiring or backfiring under load.
Afterburning (backfiring).
Black exhaust smoke or high fuel consumption.
Replacement Parts
The emission control systems on your Honda engine were designed, built, and certified to conform with
EPA and California emission regulations. We recommend the use of genuine Honda parts whenever you have maintenance done. These original-design replacement parts are manufactured to the same standards as the original parts, so you can be confident of their performance. The use of replacement parts that are not of the original design and quality may impair the effectiveness of your emission control system.
A manufacturer of an aftermarket part assumes the responsibility that the part will not adversely affect emission performance. The manufacturer or rebuilder of the part must certify that use of the part will not result in a failure of the engine to comply with emission regulations.
Maintenance
Follow the maintenance schedule on
54 . Remember that this schedule
is based on the assumption that your machine will be used for its designed purpose. Sustained high-load operation, or use in unusual conditions, will require more frequent service.
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Star Label
A Star label was applied to this outboard motor in accordance with the requirements of the California
Air Resources Board.
TECHNICAL AND CONSUMER INFORMATION
The Star Label means Cleaner Marine Engine
This engine has been certified as a:
The Symbol for Cleaner Marine Engines:
Cleaner Air and Water for healthier lifestyle and environment.
Better Fuel Economy burns up to 30 - 40 percent less gas and oil than conventional carbureted two-stroke engines, saving money and resources.
Longer Emission Warranty protects consumer for worry free operation.
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TECHNICAL AND CONSUMER INFORMATION
One Star
Low Emission
Two Stars
Very Low Emission
Three Stars
Ultra Low Emission
The one-star label identifies engines that meet the Air Resources Board’s
2001 exhaust emission standards.
Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines. These engines are equivalent to the U.S. EPA’s 2006 standards for marine engines.
The two-star label identifies engines that meet the Air Resources Board’s
2004 exhaust emission standards.
Engines meeting these standards have 20% lower emissions than One
Star-Low-Emission engines.
The three-star label identifies engines that meet the Air Resources Board’s
2008 exhaust emission standards.
Engines meeting these standards have 65% lower emissions than One
Star-Low-Emission engines.
Cleaner Watercraft - Get the Facts
1-800-END-SMOG www.arb.ca.gov
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TECHNICAL AND CONSUMER INFORMATION
Specifications
MODEL
Description Code
Type
Overall length
Overall width
Overall height
Transom height
Weight
Rated power
Full throttle range
Engine type
Displacement
Spark plug gap
Starter system
Ignition system
Lubrication system
Specified oil
L
X
L
X
L
X
H
28.5 in
(725 mm)
201 lbs
R
27.0 in
BF40A
BAYS
HT
28.5 in
(685 mm) (725 mm)
14.6 in (370 mm)
53.5 in (1,360 mm)
57.5 in (1,460 mm)
20.5 in (520 mm)
24.5 in (622 mm)
198 lbs 205 lbs
RT
27.0 in
(685 mm)
203 lbs
(91 kg) (90 kg) (93 kg) (92 kg)
212 lbs
(96 kg)
29.8 kW (40 HP)
5,000 − 6,000 rpm
4 stroke OHC in-line 3 cylinder
49.3 cu-in (808 cm )
0.024
− 0.028 in (0.60
− 0.70 mm)
Electric starter
C.D.I
Trochoid pump pressure lubrication
Engine: API standard (Fuel Efficient
SG, SH) SAE 5W-30
Gear case: API standard (GL-4/5)
SAE 90 outboard motor gear oil
Oil capacity
CARB star label
D.C. output
Cooling system
Exhaust system
Spark plugs
Fuel pump
Fuel
Tank capacity
Gear change
Steering angle
Transom angle
Tune Up
Spark plug gap
Idle speed
Valve clearance
(cold)
Other specifications
Engine: 2.5 US qt (2.4
, 2.1 Imp qt)
Gear case:
0.43 US qt (0.41
, 0.36 Imp qt)
VERY · LOW EMISSION
12V − 10A
Water cooling with thermostat
Thru-hub
DR7EA (NGK)
X22ESR-U (DENSO)
Diaphragm type
Automotive unleaded gasoline (86 pump octane or higher)
6.6 US gal (25 , 5.5 Imp gal)
Forward-Neutral-Reverse (dog type)
37.5° right and left
5 stages (11.5°, 15.5°, 19.5°, 23.5°, 27.5°)
0.024
− 0.028 in
(0.60
− 0.70 mm)
950 ± 50 rpm
See shop manual
Intake:
Exhaust:
0.15
± 0.02 mm
0.23
± 0.02 mm
See shop manual
No other adjustment is needed
Honda outboards are power rated in accordance with NMMA procedures and using the ICOMIA standard 28/23.
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TECHNICAL AND CONSUMER INFORMATION
Specifications
MODEL
Description Code
Type
Overall length
Overall width
Overall height
Transom height
Weight
L
X
L
X
L
X
Rated power
Full throttle range
Engine type
Displacement
Spark plug gap
Starter system
Ignition system
Lubrication system
Specified oil
R
27.0 in
(685 mm)
198 lbs
BF50A
BAZS
HT
28.5 in
(725 mm)
14.6 in (370 mm)
53.5 in (1,360 mm)
57.5 in (1,460 mm)
20.5 in (520 mm)
24.5 in (622 mm)
205 lbs
RT
27.0 in
(685 mm)
203 lbs
(90 kg) (93 kg) (92 kg)
212 lbs
(96 kg)
37.3 kW (50 HP)
5,500 − 6,000 rpm
4 stroke OHC in-line 3 cylinder
49.3 cu-in (808 cm )
0.024
− 0.028 in (0.60
− 0.70 mm)
Electric starter
C.D.I
Trochoid pump pressure lubrication
Engine: API standard (Fuel Efficient SG,
SH) SAE 5W-30
Gear case: API standard (GL-4/5) SAE
90 outboard motor gear oil
Oil capacity
CARB star label
D.C. output
Cooling system
Exhaust system
Spark plugs
Fuel pump
Fuel
Tank capacity
Gear change
Steering angle
Transom angle
Tune Up
Spark plug gap
Idle speed
Valve clearance
(cold)
Other specifications
Engine: 2.5 US qt (2.4
, 2.1 Imp qt)
Gear case:
0.43 US qt (0.41
, 0.36 Imp qt)
VERY · LOW EMISSION
12V − 10A
Water cooling with thermostat
Thru-hub
DR7EA (NGK)
X22ESR-U (DENSO)
Diaphragm type
Automotive unleaded gasoline (86 pump octane or higher)
6.6 US gal (25 , 5.5 Imp gal)
Forward-Neutral-Reverse (dog type)
37.5° right and left
5 stages (11.5°, 15.5°, 19.5°, 23.5°, 27.5°)
0.024
− 0.028 in
(0.60
− 0.70 mm)
950 ± 50 rpm
See shop manual
Intake:
Exhaust:
0.15
± 0.02 mm
0.23
± 0.02 mm
See shop manual
No other adjustment is needed
Honda outboards are power rated in accordance with NMMA procedures and using the ICOMIA standard 28/23.
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TECHNICAL AND CONSUMER INFORMATION
CONSUMER INFORMATION
Honda Publications
These publications will give you additional information for maintaining and repairing your outboard motor. You may order them from your Honda marine dealer.
Shop Manual
This manual covers complete maintenance and overhaul procedures.
It is intended to be used by a skilled technician.
Parts Catalog
This manual provides complete, illustrated parts lists.
Warranty Service Information
Honda Marine dealership personnel are trained professionals. They should be able to answer any question you may have. If you encounter a problem that your dealer does not solve to your satisfaction, please discuss it with the dealership’s management. The Service Manager or General Manager can help. Almost all problems are solved in this way.
If you are dissatisfied with the decision made by the dealership’s management, contact the Honda
Marine Customer Relations Office.
You can write:
American Honda Motor Co., Inc.
Marine Division
Customer Relations Office
4900 Marconi Drive
Alpharetta, Georgia 30005-8847
Or telephone: (770) 497-6400
When you write or call, please give us this information:
Name of the dealer who sold the outboard motor to you
Name and address of the dealer who services your outboard motor
Date of purchase
Your name, address, and telephone number
A detailed description of the problem
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Key Features
- Electric start
- Power tilt/trim
- Easy to operate
- Reliable performance
- Fuel-efficient
- Durable and corrosion-resistant
- Low maintenance
Frequently Answers and Questions
How do I start the engine?
What type of fuel should I use?
How do I check the oil level?
How do I tilt the engine?
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Table of contents
- 1 COVER
- 3 INTRODUCTION
- 4 A FEW WORDS ABOUT SAFETY
- 5 CONTENTS
- 9 OUTBOARD MOTOR SAFETY
- 9 IMPORTANT SAFETY INFORMATION
- 11 SAFETY LABEL LOCATIONS
- 12 CONTROLS AND FEATURES
- 12 CONTROL AND FEATURE ID CODES
- 13 COMPONENT AND CONTROL LOCATIONS
- 16 CONTROLS
- 26 INSTRUMENTS
- 27 INDICATORS
- 29 OTHER FEATURES
- 32 BEFORE OPERATION
- 32 ARE YOU READY TO GET UNDERWAY?
- 32 IS YOUR OUTBOARD MOTOR READY TO GO?
- 34 OPERATION
- 34 SAFE OPERATING PRECAUTIONS
- 34 BREAK-IN PROCEDURE
- 35 TRANSOM ANGLE ADJUSTMENT
- 36 PORTABLE FUEL TANK
- 36 FUEL HOSE CONNECTIONS
- 37 FUEL PRIMING
- 37 STARTING THE ENGINE
- 42 EMERGENCY STARTING
- 45 STOPPING THE ENGINE
- 47 GEARSHIFTING AND THROTTLE OPERATION
- 49 STEERING
- 50 CRUISING
- 52 SHALLOW WATER OPERATION
- 54 MOORING, BEACHING, LAUNCHING
- 56 SERVICING YOUR OUTBOARD MOTOR
- 56 THE IMPORTANCE OF MAINTENANCE
- 57 MAINTENANCE SAFETY
- 58 TOOL KIT AND EMERGENCY STARTER ROPE
- 59 MAINTENANCE SCHEDULE
- 61 TRIM TAB ADJUSTMENT
- 62 MANUAL RELIEF VALVE
- 62 ENGINE COVER REMOVAL AND INSTALLATION
- 70 REFUELING
- 71 FUEL RECOMMENDATIONS
- 77 STORAGE
- 77 STORAGE PREPARATION
- 82 STORAGE PRECAUTIONS
- 82 REMOVAL FROM STORAGE
- 83 TRANSPORTING
- 83 WITH OUTBOARD MOTOR INSTALLED ON BOAT
- 83 WITH OUTBOARD MOTOR REMOVED FROM BOAT
- 84 TAKING CARE OF UNEXPECTED PROBLEMS
- 84 ELECTRIC STARTER WILL NOT OPERATE
- 85 ENGINE WILL NOT START
- 87 HARD STARTING OR STALLS AFTER STARTING
- 88 ENGINE OVERHEATS
- 89 BATTERY WILL NOT CHARGE
- 90 OIL PRESSURE INDICATOR LIGHT GOES OFF
- 91 OVERHEATING INDICATOR LIGHT COMES ON
- 92 SUBMERGED MOTOR
- 94 TECHNICAL AND CONSUMER INFORMATION
- 94 TECHNICAL INFORMATION
- 97 EMISSION CONTROL SYSTEM INFORMATION
- 101 SPECIFICATIONS
- 103 CONSUMER INFORMATION
- 104 WIRING DIAGRAMS
- 107 INDEX