1989 Ski-Doo Repair Manual, Page 169Get this manual
Section 02 ENGINE SUb-section 06 (536 ENGINE TYPE)
Installation on spare crankcase without mark (ridge)
REQUlllCD TOOLS
From top edge of magneto side inlet port, mark crankcase at 52
Degree wheel 414 30.9 00)
AO,3 002 022
To correctly install the rotary valve disc proceed as follows:
AOOO 001086
(PIN 414 1047 00)
TDC gauge