1989 Ski-Doo Repair Manual, Page 200Get this manual
Section 02 ENGINE Sub-section 07 (583 ENGINE TYPE)
7, Rotary valve shaft
To install rotary valve shaft proceed as follows with the suitable tools:pusher !Pl 420 8766 05)- water pump seal sleeve (P! 420 8769 801
To correctly install the rotary valve, proceed as follows:
- Turning crankshah counter clockwise, (drive pulley side) bring magneto side to top dead center using TDC gauge
NOTE: Do not use crankshahlocking tool to find out magneto side top dead centerIt will not give the right poSition- Position the rotary valve on gear in such way that its closing edge will be as close as possible to the bottom of the magneto side inlet port, and its opening edge in line with the mark (ridge) on the upper leh side of the rotary valve housing