TECHNICAL AND CONSUMER INFORMATION. Honda BF 50A, BF 40A 111 Pages

TECHNICAL AND CONSUMER INFORMATION. Honda BF 50A, BF 40A
Add to My manuals

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.

advertisement

TECHNICAL AND CONSUMER INFORMATION. Honda BF 50A, BF 40A | Manualzz

01/11/21 19:52:27 31ZW4600_093

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.

101 ).

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:

92

02/03/25 10:24:33 31ZW4600_094

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

93

01/11/21 19:52:45 31ZW4600_095

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

94

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.

01/11/21 19:52:56 31ZW4600_096

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.

95

01/11/21 19:53:08 31ZW4600_097

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

p.

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.

96

01/11/21 19:53:20 31ZW4600_098

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.

97

01/11/21 19:53:29 31ZW4600_099

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

98

02/03/25 10:25:37 31ZW4600_100

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 page 66

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.

99

02/03/25 10:26:21 31ZW4600_101

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 page 66

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.

100

01/11/21 19:55:18 31ZW4600_102

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:

Model and serial numbers (p.

92 )

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

101

advertisement

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?
Make sure the emergency stop switch clip is in place, the gearshift is in neutral, and the choke is engaged if starting a cold engine. Turn the ignition key to the START position and hold it until the engine starts. Once running, release the key and disengage the choke gradually as the engine warms up.
What type of fuel should I use?
Use unleaded gasoline with an octane rating of 87 or higher. Do not use fuel with ethanol content greater than 10%.
How do I check the oil level?
With the engine tilted up, remove the oil dipstick and wipe it clean. Reinsert the dipstick fully and then remove it again. The oil level should be between the upper and lower marks on the dipstick.
How do I tilt the engine?
Use the power tilt switch to raise or lower the engine. Ensure the engine is fully lowered when operating at high speeds and tilted up when operating in shallow water or mooring for long periods.

Related manuals

Download PDF

advertisement

Table of contents