Pressure Test - Stihl 064 Service Manual

STIHL 064, 066
Fitting sealing plate 0000 855 8105
between muffler lower casing and
cylinder
- Slide the sealing plate between
the muffler lower casing and the
cylinder exhaust port. Retighten
the mounting screws moderately.
Note: The sealing plate must com-
pletely fill the space between the
two mounting screws. Push the
narrow end of the sealing plate
home until it just locates under the
lower casing.
- Retighten the two mounting
screws moderately.
- Remove the carburetor - see 11.3.
- Set the piston to top dead center
(T.D.C.). This can be checked
through the inlet port.
Test flange 1113 850 4200
fitted on studs
- Fit the test flange in place of the
carburetor.
- Fit the two hexagon nuts and
tighten them down moderately.
Note: The test flange locates
against the manifold to produce an
airtight seal. The lower pin in the
test flange seals the impulse hose.

Pressure Test

4.6.2
Top:
Tester's pressure hose fitted on
test flange nipple
Bottom:
Closing the vent screw
- Preparations - see 4.6.1.
- Connect tester's pressure hose
to nipple on test flange.
- Make sure the spark plug is properly
tightened down before starting the
test.
- Close the vent screw on the rubber
bulb.
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