easy starting, do not use gasoline left over from the previous
season.
• Do not add oil to the gasoline.
Fuel Type
• For best results use only clean, fresh, unleaded gasoline with
a pump sticker octane rating of 87 or higher.
• Unleaded gasoline is recommended as it leaves less
combustion chamber deposits.
GASOLINE/ALCOHOL BLENDS:
Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by
volume) is approved, as a fuel. Other gasoline/alcohol blends
are not approved.
GASOLINE/ETHER BLENDS:
Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline blends
(up to a maximum of 15% MTBE by volume) are approved as a
fuel. Other gasoline/ether blends are not approved.
BATTERY INSTALLATION
WARNING: SHOULD ONLY BE DONE BY AN AUTHO-
RIZED DEALER.
BATTERY REPLACEMENT #
32-0058
HIGH ALTITUDE
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 unit
at altitudes above 5,000 feet (1,500 meters), have your 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.
NOTE: 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 5,000feet (1,500 meters) 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.
Operator's Manual
Installation
21