8658924 40 ft-lb Gasoline Jackhammer V4.2
14 For technical questions call 1-800-665-8685
9. After refueling, hand-tighten the fuel tank cap securely.
10. Wipe up any spilled fuel before starting the engine or allow the fuel to
evaporate. Spilled fuel is both a fire hazard and an environmental hazard.
CARBURETOR
The gasoline/oil mixture can separate and clog the fuel line if left too long between
uses. This may cause an engine failure, if the tool is not used for more than a week.
1. Drain the fuel from the fuel tank.
2. Clean the oil out of the fuel line.
3. Refill the tank and remove the fuel line from the carburetor.
4. Repeatedly press the fuel priming bubble until all the oil is flushed from
fuel line into a suitable container for disposal.
5. Reattach the fuel line to the carburetor.
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 altitudes, 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 (1,500 m). Even with carburetor
modification, engine horsepower will decrease about 3.5% for each 1,000 ft
(305 m) increase in altitude. The effect of altitude on horsepower 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 (1,500 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.