Accelerator
Pump Bore
Liquid
Drawn In
Fuel Tank
Test fuel tank and tank vent.
;
It is a good practice to always pressure test an empty tank
to be sure it has no leaks. Then perform a vacuum test to
verify that the tank vent is allowing air into the tank.
;
A poorly venting tank can cause running behavior such as
engine stalling when hot, poor acceleration, or loss of power
when hot.
Special Service Procedures
Special Tool Application: 10mm Piston Stop, Flywheel Removal.
;
To remove the flywheel or starter cup nut on a 4-MIX® engine, block the piston with
the piston stop. STIHL Part # 4282 890 2700.
;
Install the flywheel puller, part number 1116 893 0800, until it seats against the
flywheel, then back it off one full turn. Hit it squarely with a ball peen hammer to
release the flywheel from the crankshaft.
;
Do not use an impact wrench on any STIHL product.
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