Honda Bf5 Owners Manual

69 Carburetor Modif ication f or
High Altitude Operation
TECHNICAL AND CONSUMER INFORMATION
When the carburetor has 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 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
f actory specif ications. Even with...

70 Oxygenated Fuels
ETHANOL:
MTBE:
METHANOL:
TECHNICAL AND CONSUMER INFORMATION
Some conventional gasolines are
being blended with alcohol or an
ether compound. These gasolines are
collectively referred to as oxygenated
f uels. 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...

71 Emission Control System
Inf ormation
TECHNICAL AND CONSUMER INFORMATION
Source of EmissionsTampering and Altering The U.S. and Calif ornia Clean
Air Acts
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 f orm
photochemical smog when subjected
to sunlight. Carbon monoxide does
not react in the same way, but it is
toxic.
Honda utilizes lean carburetor...

72
TECHNICAL AND CONSUMER INFORMATION
Maintenance Replacement Parts Problems That May Af f ect
Emissions
A manuf acturer of an af termarket
part assumes the responsibility that
the part will not adversely af f ect
emission performance. The
manufacturer or rebuilder of the part
must certif y that use of the part will
not result in a f ailure of the engine to
comply with emission regulations.
Follow the maintenance schedule on
p. . Remember that this schedule
is based on the assumption that your
machine...

73 Star Label
The Symbol for Cleaner Marine Engines:
Cleaner Air and Water -
Better Fuel Economy -
Longer Emission Warranty -
TECHNICAL AND CONSUMER INFORMATION
The Star Label means Cleaner Marine Engine
A Star label was applied to this
outboard motor in accordance with
the requirements of the California
Air Resources Board.
f or healthier lif estyle and environment.
burns up to 30 - 40 percent less gas and oil than
conventional carbureted two-stroke engines, saving money and resources.
protects consumer...

74Two Stars
Very Low
Emission One Star
Low
Emission
Three Stars
Ultra Low
Emission
Four Stars
Super Ultra
Low Emission
TECHNICAL AND CONSUMER INFORMATION
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.
The two-star...

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¶ BF5A
BADS
13.8 in (350 mm)LA SA
20.7 in (525 mm)
39.6 in (1,005 mm) 44.7 in (1,135 mm)
17.5 in (445 mm) 22.5 in (572 mm)
59.5 lbs (27.0 kg) 60.6 lbs (27.5 kg)
3.7 kW (5.0 HP)
4,500 5,000 rpm
4 stroke OHV 1 cylinder, water-cooled
7.7 cu-in (127 cm
)
0.028 0.031 in (0.70 0.80 mm)
Recoil starter
Transistorized Ignition Control Module (ICM)
Trochoid pump pressure lubrication
API standard (SG, SH, SJ)
SAE 10W-30
API standard (GL 4/5)
SAE 90 outboard motor gear oil
0.1 US qt (0.1...

76 CONSUMER INFORMATION
Honda PublicationsCustomer Service Inf ormation
American Honda Motor Co., Inc.
TECHNICAL AND CONSUMER INFORMATION
Shop Manual
Parts Catalog
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....