9. TECHNICAL & CONSUMER INFORMATION
TECHNICAL INFORMATION
Serial Number Location
Record the engine serial number in the space below. You will need this serial number
when ordering parts, and when making technical or warranty inquires.
Engine serial number:
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. 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 5,000 feet (1,500 meters), 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
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 (1,500meters) 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.
ENGINE TYPE
SERIAL NUMBER
29