TECHNICAL AND CONSUMER INFORMATION
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 plugs and cause hard starting.
High altitude performance can be
improved by specific modifications
to the carburetors. If you always
operate your outboard motor at
altitudes above 5,000 feet (1,500
meters), have an authorized Honda
marine dealer perform this carburetor
modification.
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.
NOTICE
When the carburetors have been
m odified f o r high altitude operation,
the air-fuel mixture will be too lean
f o r low altitude use. Operation at
altitudes below 5,000 f e e t (1,500
m eters) with m odified carburetors
m ay cause the engine to overheat
and result in serious engine damage.
F or use a t low altitudes, have an
authorized H onda marine dealer
return the carburetors to original
fa c to r y specifications.
Battery
For complete information, refer to
the battery manufacturer’s
instructions.
Minimum Requirements
12V-65Ah (CCA 420)
106