Bombardier SeaDoo 1990 factory shop manual, Page 58Get this manual

Bombardier SeaDoo 1990 factory shop manual, Page 58

Section 03 ENGINE Sub-Section 06 (ROTARY VALVERESERVOIR) 0-nng Adapter Gasket Clamp (21 Hose Oil tank 70 Grommet (21 Grommet
20 Nmm (15 !bfft)Remove cover then clean and measure compressed tin thickness, it must be within specified toleranceOtherwise
check cover for wearlwarpage and crankcaserenew defective parts DIISASSEMBLY 20,23,Rotary Valve CoverScrew Unscrew four retaining
screws and withdraw rotary valve cover and valve 16,17, Snap RingRotary Vallve Shaft To remove rotary valve shaft assembly
from crankcase, first remove snap ring from crankcaseRemoving NOTEIf gap is found under tolerance, sand surface with fine
sand paper on surface plate, rub part against lightlyoiled sand paper CRANKSHAFTROTARY VALVE SHAFT GEAR BACKLASH Remove PTO
flywheel guardRemove spark plugs, rotary valve cover and valve Manually feel backlash at one position, then turn crankshaft
about 118 turn and recheckContinue this way to complete one revolution Backlash must be even at all positions Otherwise overhaul