User's Manual

High altitude operation

At high altitude, the standard carburetor air-fuel mixture will be excessively

rich. Performance will decrease, and fuel consumption will increase.

High altitude performance can be improved by installing a smaller diameter

main fuel jet in the carburetor and readjusting the pilot screw. If you always

operate the water pump at altitudes higher than 6,000 feet above sea level,

have your authorized Honda Water Pump dealer perform these carburetor

modifications.

Even with suitable carburetor jetting, engine horsepower will decrease approx-

imately 3.5% for each 1,000 foot increase in altitude. The affect of altitude on

horsepower will be greater than this if no carburetor modification is made.

CAUTION: Operation of the Water Pump at an altitude lower than the car-

buretor is jetted for may result in reduced performance, overheating, and

serious engine damage caused by an excessively lean air/fuel mixture.