1996 Ski-Doo Shop Manual, Volume 1, Page 112Get this manual
Se ion EN GI Sub-Section 03 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
CHECKING CRANKSHAITALIGNMENT
Install degree wheel (PN 4143529 00) on crankshaft endRemove both spark plugsInstall TDC gauge (PN 4141047 00) in spark plug hole on MAG side, Bring MAG piston at top dead centerRotate degree wheel (not crankshaft) so that 360 mark aligns with center of crankcaseScribe mark on crankcaseRemove TDC gauge and install it on PTO sideBring PTO piston to top dead center