Bombardier SeaDoo 1992 factory shop manual, Page 86Get this manual
Section 03 ENGINE Sub-section 06 (ROTARY VALVE AND RESERVOIIR)
Using the depth micrometer again, measure the distance between the rotarv valve cover seating surface and the valve surface of the cover2 mrn ,106 001 in)
EXAMPLECrankcase rib depth Depth of cover seating surface ,138 in
10 039 -001 in)
0 in,023 in Rotary valve thickness .011 in Clearance between rotary valve and cover
Your result must be within the specified tolerance 0.28 0.06 rnm (0.011 .002 mm)Ilf rotary valvelrotary valve cover clearance is out of specification, machine rotary valve cover seating surface or replace the coverMachining Information The amount of mrn fin) over tolerance must be removed from the rotary valve cover seating surfaceAllso cut the O-ring groove and equal amount to obtain 10 .03 mrn (.a39 ,001 in) between the bottom of the groove and the seating surfaceRemove burrs on the edges of the seating surface and O-ring groove
Cover seating surface