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CARBURETOR ADJUSTMENT
Never make adjustments to the carburetor. The carburetor was set at the
factory to operate efficiently under most conditions. Only a qualified service
technician should adjust the carburetor if it is required.
MODIFYING THE CARBURETOR FOR HIGH ALTITUDES
At high altitude, the standard air-fuel mixture is too rich, causing increased fuel
consumption and decreased performance. A rich mixture will also foul the
spark plug and cause hard starting.
A qualified technician can improve high altitude performance with certain
modifications. Have your carburetor modified if the engine will routinely be
operated at altitudes above 5,000 ft (1,524 m). Even with carburetor
modification, engine power will decrease about 3.5% for each 1,000 ft (305 m)
increase in altitude. The effect of altitude on engine power will be greater than
this is if no modification is made.
NOTICE! 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 5,000 ft (1,524 m) may cause the engine to overheat and result in serious
engine damage. When using this engine at low altitudes, have a qualified
technician return the carburetor to original factory specifications.
CLEANING THE SEDIMENT CUP
CAUTION! Wear latex or rubber gloves when working on the sediment cup. The
cup may contain fuel that will cause skin irritation. Prolonged and repeated
exposure to fuel on skin may result in dry, cracked skin.
1.
Switch the fuel valve to the OFF position.
2.
Remove the fuel sediment cup, screw and o-ring.
3.
Clean the sediment cup with a non-flammable solvent or detergent and
rinse. Allow to dry.
a.
Some chemicals will damage the o-ring material. Check for
compatibility or replace the o-ring.
4.
Reassemble the sediment cup and o-ring.
5.
Switch the fuel valve to the ON position and check for leaks. Replace the
o-ring if the installation is correct, but fuel still leaks from the cup.
EMISSION CONTROL SYSTEM INFORMATION
The combustion process produces carbon monoxide, hydrocarbons and
nitrogen oxides. Controlling these emissions is important for personal and
environmental health.
Visit www.princessauto.com for more information
7 HP 212cc OHV Gas Engine with Electric Start
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