BRP BOMBARDIER DS250 2006 Shop Manual page 49

Section 03 ENGINE
Subsection 02 (ENGINE LEAK TEST)
– Unscrew the magneto access plug.
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– Turn drive pulley clockwise to bring piston at
TDC. Align TDC mark besides the letter "T" as
shown.
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TCD MARK BESIDE THE T ALIGNED
– Check if marks are aligned on camshaft gear
as shown. Otherwise, continue turning drive
pulley until crankshaft and camshaft marks are
properly positioned.
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How to Lock Piston at TDC
(compression)
– To maintain the piston at TDC position, install
the camshaft locking tool (P/N 529 036 055).
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Leak Test
Thread the correct adaptor hose of the leak down
tester (P/N 529 035 661) into the spark plug hole.
Do not connect the adaptor hose to the leak down
tester at this time.
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