© STIHL Inc., Virginia Beach, VA 2013 US/STR
confidential
Remove Starter Housing
Remove fuel and oil tank caps
Rock the cap retainer to the side
Remove starter housing
Reinstall the caps if necessary to prevent fuel or oil from
running out on the work area
© STIHL Inc., Virginia Beach, VA 2013 US/STR
confidential
15. Cylinder Leak Down Test
This test typically is not
necessary on a two-stroke
engine but can be done to verify
how well the rings are sealing
with the flywheel blocked so the
piston is slightly down from TDC
A leak down test should always
be done on a four-stroke engine
because the piston and rings
cannot be observed visually
The leak down test also verifies
that the intake and exhaust
valves are sealing properly
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