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Honda Honda Engines GXH50 Manual

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ENGLISH
Carburetor Modifications for High Altitude Operation
TECHNICAL INFORMATION
Serial Number Location
Oxygenated Fuels
ETHANOL
MTBE
METHANOL
TECHNICAL & CONSUMER INFORMATION
ENGINE TYPE
ENGINE SERIAL NUMBER
13
Date Purchased: ______ / ______ / ______
Engine type: ___ ___ ___ ___
Engine serial number: __ __ __ __ __ __ __ __ __ __ __
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. Operation at an altitude that differs from that
at which this engine was certified, for extended periods of time,
may increase emissions.
High altitude performance can be improved by specific
modifications to the carburetor. If you always operate your engine
at altitudes above 1,500 meters (5,000 feet), have your servicing
dealer perform this carburetor modification. This engine, when
operated at high altitude with the carburetor modifications for
high altitude use, will meet each emission standard throughout its
useful life.
Even with carburetor modification, engine horsepower will
decrease about 3.5% for each 300-meter (1,000-foot) 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 1,500 meters (5,000 feet) with a modified
carburetor may cause the engine to overheat and result in serious
engine damage. For use at low altitudes, have your servicing
dealer return the carburetor to original factory specifications.
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 the
Distributor’s Limited Warranty
.
If you notice any undesirable operating symptoms, try another
service station or switch to another brand of gasoline.
(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 damage
metal, rubber, and plastic parts of your fuel
system.
(methyl tertiary butyl ether) 15% by volume
You may use gasoline containing up to 15%
MTBE by volume.
(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.
The following are the EPA approved percentages of oxygenates:
Before using an oxygenated fuel, try to confirm the fuel’s contents.
Some states/provinces require this information to be posted on
the pump.
If you use oxygenated fuel, be sure it is unleaded and meets the
minimum octane rating requirements.
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.
Record the engine serial number, type and purchase date in the
space below. You will need this information when ordering parts
and when making technical or warranty inquiries.
05/04/22 18:55:49 32Z4C600_013
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