Power Unit; Muffler; Leakage Test - Stihl TS 700, TS 800 Service Manual

7.

Power unit

7.1

Muffler

– Troubleshooting, see b 4.5
Note:
The spark arresting screen can be
replaced without removing the
muffler.
– Remove bearing with guard,
see b 5.1
: Remove screws from the muffler
(arrows).
1
: Remove the muffler (1).
24
1
: Remove the gasket (1)
1
: Press the clip (1) of the spark
arresting screen together with a
suitable tool.
2
1
: Remove the clip (1) and spark
arresting screen (2).
– Clean the spark arresting screen
or fit a new screen if necessary.
7.2

Leakage test

Defective oil seals and gaskets or
cracks in castings are the usual
causes of leaks. Such faults allow
supplementary air to enter the
engine and upset the fuel-air
mixture.
This makes adjustment of the
prescribed idle speed difficult, if not
impossible.
Moreover, the transition from idle
speed to part or full throttle is not
smooth.
The crankcase can be thoroughly
checked for leaks with the
carburetor and crankcase tester
and the vacuum pump.
TS 700, TS 800