26 DR
®
GASOLINE ENGINE
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.
Oxygenated Fuels
Some conventional gasoline is being blended with alcohol or an ether compound. These gasoline blends are collectively referred
to as oxygenated fuels.
To meet clean air standards, some areas 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 oxygenated fuel, try to confirm the fuel’s contents. Some areas require this information to be posted on the pump.
ENGINE TYPE
SERIAL NUMBER
When the carburetor has been mod
ified for high altitude operation, the air-fuel mixture will be too lean for low altitude use.
ation 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.
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