Leakage Test; Preparations - Stihl MS 362 Manual

2 2
1
: Fit and tighten down the screws
(1) firmly.
: Tighten down the screws (2)
firmly.
– Fit new plugs.
– Tightening torques, b 2.5
6.2

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.
Always perform the vacuum test
first and then the pressure test.
The engine can be checked
thoroughly for leaks with the pump
0000 850 1300.
34
6.2.1

Preparations

1
– Remove the shroud, b 6.4
– Pull off the boot and unscrew the
spark plug.
– Set the piston to top dead center.
This can be checked through the
spark plug hole.
– Remove the decompression
valve, b 6.9
: Fit the plug (1) 1122 025 2200
and tighten it down firmly.
: Fit the spark plug (2) and tighten
it down firmly.
– Tightening torques, b 2.5
1
2
– Pry out the plugs.
– Do not refit old plugs, always fit
new ones.
: Loosen the screws (1) and (2).
1
2
1
2
1
: Fit the sealing plate (1)
0000 855 8107 between the
cylinder exhaust port and muffler
and tighten down the screws
moderately.
The sealing plate must completely
fill the space between the two
screws.
– Remove the carburetor, b 12.5
2
1
: Check that the sleeve (1) and
washer (2) are in place.
MS 362, MS 362 C