Section 04
ENGINE
Subsection 07
(ROTARY VALVE)
SMR2000-012_04_07A.FM
04-07-3
Remove cover then clean and measure compressed
soldering wire thickness, it must be within the spec-
ified tolerance 0.30 ± 0.05 mm (.012 ± .002 in).
If rotary valve cover clearance is over specified tol-
erances, machine rotary valve cover seating sur-
face 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 1.00
±
0.03 mm (.039
±
.001 in) depth
between 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
A. O-ring groove depth must be 1.00
±
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).
DISASSEMBLY
Rotary Valve Cover
Unscrew 4 retaining screws and withdraw rotary
valve cover
no. 1
and rotary valve
no. 13
.
Rotary Valve Shaft
To remove the rotary valve shaft assembly, the en-
gine must be removed from watercraft (refer to
ENGINE).
Open bottom end and remove crankshaft (refer to
BOTTOM END).
First remove snap ring
no. 4
from crankcase.
1. Removing snap ring
To remove rotary valve shaft assembly, use the
appropriate puller (P/N 290 876 488).
PULLER (P/N 290 876 488)
1
A
F01D3OA
F01D22A
1
F01D23B
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Summary of Contents for 2001 GS
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