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See manual "Troubleshooting,
standard repairs" for trouble-
shooting procedures.
Spark arrester screen
•
Remove screw (1).
•
Pull out spark arrester screen (2).
- Clean spark arrester screen, fit
new screen if necessary.
Muffler
- Remove shroud,
•
Remove outer screw.
•
Remove inner screws.
- Lift off muffler.
•
Raise tongue (1) on retainer.
•
Pull out seal (2).
The parts are installed in reverse
order.
- Press tongue down again after
inserting seal.
- Tighten muffler screws to a
torque of 9.5 Nm.
- Refit shroud.
Defective oil seals and gaskets or
cracks in castings cause leaks.
Such faults allow supplementary
air to enter the engine and thus
impair the fuel-air mixture.
This makes adjustment of the
specified idle speed difficult, if not
impossible.
It also prevents a smooth transi-
tion from idle speed to part or full
throttle.
The crankcase can be thoroughly
checked for leaks with the carbure-
tor and crankcase tester and the
vacuum pump.
1
1
2
2
392RA013 VA
392RA015 VA
1
1
2
2
392RA016 VA
392RA014 VA
11