Carburetor Modifications For High Altitude Operation; Remote Control Linkage - Honda GX630 Owner's Manual

Remote Control Linkage

The throttle and choke control levers are provided with holes for
optional cable attachment. The following illustrations show
installation examples for a solid wire cable and for a flexible,
braided wire cable.
RIGHT SIDE CONTROL
THROTTLE CABLE
4×6 mm
LEFT SIDE CONTROL
CABLE
THROTTLE CABLE
CHOKE CABLE
CABLE
5×16 mm (2)
CABLE
HOLDER (2)
CHOKE CABLE
CHOKE CONTROL
LEVER
WIRE HOLDER
THROTTLE CONTROL LEVER
GOVERNOR SPRING
5×16 mm (2)
CABLE HOLDER (2)
4×6 mm
CHOKE CONTROL
LEVER
THROTTLE CONTROL
LEVER
GOVERNOR SPRING
WIRE HOLDER
• For Throttle Cable
5 mm
THROTTLE CONTROL LEVER
CIRCLIP
THROTTLE CABLE
• For Choke Cable
5 mm
CHOKE CONTROL LEVER
CIRCLIP
CHOKE CABLE

Carburetor Modifications 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 1,500 meters (5,000 feet), 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 300 meter (1,000 foot) 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 1,500 meters (5,000 feet) 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.
ENGLISH
4×6 mm
WIRE HOLDER
(for throttle cable)
4×6 mm
WIRE HOLDER
(for choke cable)
15