Honda Bf8a Owners Manual

							69
ENGINE SERIAL NUMBER
PRODUCT
IDENTIFICATION NUMBER
TECHNICAL AND CONSUMER INFORMATION
TECHNICAL INFORMATION
Serial Number Locations
Record the engine serial number, the product identification  number and the
date of purchase in the space below. You will need these serial numbers when
ordering parts, and when making technical or warranty inquiries (see page 78).
Engine serial number: _________________________________________
Product identification number: ___________________________________
Date of purchase: ____________________________________________
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NOTICE
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 plug and cause hard starting.
High altitude performance can be improved by specific modifications to the
carburetor. 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 (300-meter) increase in altitude. The effect of
altitude on horsepower will be greater than this if no carburetor modification
is made.
When the carburetor has been modified for high altitude operation, the
air-fuel mixture will be too lean for low altitude use. Operation at
altitudes below 5,000 feet (1,500 meters) with modified carburetor 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
carburetor to original factory specifications.
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							71 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 corro-
sion inhibitors to protect the fuel system. Gasoline con-
taining more than 5% methanol by volume may cause
starting and/or performance problems. It may also dam-
age 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 men-
tioned above are not covered under warranty.
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							72 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 impor-
tant 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 California 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 emis-
sions 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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							73 TECHNICAL AND CONSUMER INFORMATION
Problems That May Affect 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 recom-
mend  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 page 43. 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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							74
TECHNICAL AND CONSUMER INFORMATION
Star Label
A Star label was applied to this outboard motor in accordance with the
requirements of the California Air Resources Board.
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.
The one-star label identifies engines that meet the Air Resources Board’s
Personal Watercraft and Outboard marine engine 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.
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							75
TECHNICAL AND CONSUMER INFORMATION
The two-star label identifies engines that meet
the Air Resources Board’s Personal Watercraft
and Outboard marine engine 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 Personal
Watercraft and Outboard marine engine 2008
exhaust emission standards or the Sterndrive
and Inboard marine engine 2003 – 2008
exhaust emission standards. Engines meeting
these standards have 65% lower emissions
than One Star-Low Emission engines.
The four-star label identifies
engines that meet the Air
Resources Board’s Sterndrive and
lnboard marine engine 2009
exhaust emission standards.
Personal Watercraft and Outboard
marine engines may also comply
with these standards. Engines
meeting these standards have
90% 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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							76 TECHNICAL AND CONSUMER INFORMATION
Specifications
Model
Description code
Rated power
Full throttle range
Engine type
Displacement
Spark plug gap
Starter system
Ignition system
Lubrication system
Specified oil
Oil capacity
CARB star label
D.C. output
Cooling system
Exhaust system
Spark plugs
Fuel pump
Fuel
Tank capacity
Steering equipment
Tilt angle
Steering angle
Dimensions
Length
Height
Width
Outboard motor
transom height
Standard propeller
(No. of blades-diameter x pitch)
Gear change
Dry weight
BF8A
BZBC
6.3 kW (8.4 HP)
4,950 — 5,500 rpm
4-stroke OHC in-line twin cylinder
12.0 cu-in (197 cm3)
0.024 — 0.028 in (0.60 — 0.70 mm)
Recoil starter
Digital Ignition Control Module (ICM)
Trochoid pump pressure lubrication
Engine: API standard (SG or later oil)
             SAE 10W-30
Gear case: API standard (GL-4/5)
                   SAE 90 outboard motor gear oil
Engine: 0.85 US qt (0.80 x, 0.70 lmp qt)
Gear case: 0.24 US qt (0.23 x, 0.20 lmp qt)
VERY•LOW EMISSION
12V—5A
Water cooling with thermostat (volumetric pump)
Underwater exhaust
DR-5HS (NGK)
Diaphragm type fuel pump
Automotive unleaded gasoline (86 pump octane
or higher)
3.0 US gal (12 x, 2.6 lmp gal)
Tiller handle
3-stage adjustment (30°, 45°and 70°)
40° right and left
S Model L Model
20.7 in (525 mm) 20.7 in (525 mm)
39.8 in (1,010 mm) 45.7 in (1,160 mm)
12.4 in (315 mm) 12.4 in (315 mm)
S Model L Model
16.5 in (420 mm) 22.5 in (572 mm)
9-1/2 x 8-5/8 in (3-240 x 220 mm)
Forward-Neutral-Reverse (dog type)
S Model     77.2 lbs. (35.0 kg)
L Model     79.4 lbs. (36.0 kg)
Honda outboards are power rated in accordance with NMMA procedures and
using the ICOMIA standard 28/23.
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							77 TECHNICAL AND CONSUMER INFORMATION
Tuneup
Spark plug gap 0.024-0.028 in (0.60-0.70 mm) See page 54.
Idle speed 1,200 ± 100 See shop manual.
Valve clearance Intake:    
 0.12 ± 0.02 mm See shop manual.
(cold) Exhaust: 0.20 ± 0.02 mm
Other specifications                          No other adjustments needed.
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							78 TECHNICAL AND CONSUMER INFORMATION
CONSUMER INFORMATION
Honda Publications
These publications will give you additional information for maintaining and
repairing your outboard motor.
Shop Manual
This manual covers complete maintenance and overhaul procedures.
It is intended to be used by a skilled technician.
Available through your Honda marine dealer or through Helm Inc. at
1 888-292-5395 or visit www.Honda-marine.com > product manuals.
Parts Catalog
This manual provides complete, illustrated parts lists.
The catalog is available from your Honda marine dealer.
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