BOMBARDIER SEA-DOO GS 5626 1998, Shop Manual

Page: 129 / 426

Section 04 ENGINE
Subsection 07 (ROTARY VALVE)
04-07-3
TYPICAL
1. Solder
If rotary valve cover clearance is out of specifica-
tion, machine rotary valve cover seating surface
or replace the cover.
MACHINING INFORMATION
The amount of material over tolerance must be
removed from the rotary valve cover seating sur-
face.
Also cut the O-ring groove the same amount to
keep the 1.0
±
0.03 mm (.039
±
.001 in) depth be-
tween the bottom of the groove and the seating
surface.
Remove burrs on the edges of the seating surface
and O-ring groove.
SAME AMOUNT REMOVED FROM COVER SEATING SURFACE
AND O-RING GROOVE BASE
1. Cover seating surface
2. O-ring groove depth must be 1.0
± 0.03 mm (.039 ± .001 in)
Reverify the clearance.
At assembly the rotary valve timing must remain
as per original setting.
NOTE: If rotary valve crankcase surface is worn,
it is possible to have it reworked at the factory.
Contact your dealer or distributor.
Rotary Valve Shaft Gear Backlash
Remove PTO flywheel guard.
Remove spark plugs, rotary valve cover and valve.
Manually feel backlash at one position, then turn
crankshaft about 1/8 turn and recheck. Continue
this way to complete one revolution.
Backlash must be even at all positions. Otherwise
overhaul engine to find which part is faulty (gear,
rotary valve shaft or crankshaft with excessive de-
flection).
F01D3PA
1
1
2
F01D3OA