Bombardier SeaDoo 1990 factory shop manual, Page 64Get this manual
Section 03 ENGINE Sub-section 06 (ROTARY VAILVERESERVOIR)
NOTERotary valve is asymmetrical Therefore, try turning it inside out then reinstall on splines to determine best installlation position
Proceed as follows :
- Turning crankshaftbring MIAG side piston to Top
Dead center using TDC gauge
TDC gauge o'n MAG side Bring piston at TDC
TDC gauge on MAG side
Bring piston a1 TDC
- For opening mark, first align 360' line of degree whee!