3.51
ENGINE
3
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
Cam Chain / Camshaft Installation
Install the cam chain over the crankshaft.
IMPORTANT: In order to time the camshaft to the
crankshaft, the piston must be precisely located at
Top Dead Center (TDC).
Camshaft Timing
1. Apply Premium Starter Drive Grease (PN 2871460)
to the camshaft main journals and cam lobes.
Lubricate automatic compression release
mechanism with clean engine oil.
2. Install the camshaft with the lobes facing downward
and the sprocket alignment pin facing upward.
3. Disconnect the wire from the cam chain and rotate the
engine to align the
single (TDC ) timing mark (Top
Dead Center) on the flywheel with the notch in the
timing inspection window. Be sure to use the single
TDC mark when installing the cam. Do not use the
advance marks.
Serious engine damage may result if the camshaft
is not properly timed to the crankshaft.
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