Unique Industries Honda GX690 - Manual (Page 15)

ENGLISH
Remote Control Linkage
Carburetor Modifications for High Altitude Operation
5 16 mm (2)
CHOKE CONTROL
LEVER
GOVERNOR SPRING
CABLE
HOLDER (2)
THROTTLE CONTROL LEVER
5 16 mm (2)
CHOKE CONTROL
LEVER
GOVERNOR SPRING
4 6 mm
CABLE HOLDER (2)
THROTTLE CONTROL
LEVER
CABLE
CHOKE CABLE
THROTTLE CABLE
CHOKE CABLE
THROTTLE CABLE
4 6 mm
CABLE
WIRE HOLDER
RIGHT SIDE CONTROL
LEFT SIDE CONTROL
WIRE HOLDER
For Choke Cable
For Throttle Cable
5 mm
CIRCLIP
4 6 mm
THROTTLE CABLE
WIRE HOLDER
(for throttle cable)
5 mm
CIRCLIP
THROTTLE CONTROL LEVER
CHOKE CONTROL LEVER
4 6 mm
WIRE HOLDER
(for choke cable)
CHOKE CABLE
15
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.
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.
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