McCulloch 250 - FUEL TANK FILTER MAINTENANCE; FUEL TANK VENT SYSTEM

dirt from entering the fuel line to the carburetor. After awhile,
dirt will build up on the filter and will cut down the flow of fuel.
Or, if water enters the fuel tank, the water will get into the filter
and prevent the flow of fuel to the carburetor. The filter can be
cleaned or replaced.
1. Remove the fuel tank cap.
2. Lift out the free end (the bell-shaped end) of the black rubber
pick-up tube. (figure 12)
3.
Carefully remove the filter from inside the bell.
4. Wash the filter in gasoline or solvent or replace it with a new
filter. If the filter is water soaked, dry it thoroughly or replace it
with a new filter.
5. Carefully put the filter back into the bell.
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Never operate your chain saw engine without the fuel
filter being securely in place. Never put your old
filter back into the bell with the side that was dirty
toward the tube end of the bell.
FUEL TANK VENT SYSTEM
The fuel tank of your chain saw is equipped with a fu el tank vent
system to prevent the build up of tank pressure or ta nk suction.
The fuel tank has the vent in the fuel cap (figure 13). Ifeithertank
pressure or tank suction deve lops, take your chain saw to yo ur
McCulloch dealer for servicing.
Tank pressure will prevent the engine from idling properly. Tank
suction will prevent the engine from developing full power. Both
conditions can be caused by putting dirty fuel into the fuel tank.
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