Bombardier SeaDoo 1990 factory shop manual, Page 65Get this manual
Slub-Section 06 1
Sectlion 03 ENGINE (ROTARY VALVERESERVOIR)
For closing mark, first allign 360' line of degree wheel with TOP of MAG side inlet port Then, findline on degree wheel and mark crankase at this point
Closing mark
l Top of MAG
Z Find 52'
Fool 003 092
on degree wheel and mark here