Bombardier SeaDoo 1997 factory shop manual, Page 91Get this manual
Section 03 ENGINE Sub-Section 07 (ROTARY VALVE)
ROTARY VALVE TIMING
CAUTION
Never use the ridge molded in crankcase as timing markThe following tools are required to measure rotary valve opening and closing angles in relation with MAG side piston33
350 360 10 20 340 10 360 350 20 40
110 100 90
295 000 007
90 100 11 280 270 26 0