Sea-doo RX Shop Manual page 85

Section 04 ENGINE
Subsection 05 (TOP END)
Inspect plane surfaces for warpage. Small defor-
mation can be corrected by grinding surface with
a fine sand paper. Install sand paper on a surface
plate and rub part against oiled sand paper.
The inspection of engine top end should include
the following measurements.
ENGINE
MEASUREMENT NEW PARTS
(min.)
Cylinder taper N.A.
Cylinder out
N.A.
of round
Piston/cylinder wall
clearance for 0.09 mm
947 carburetor- (.0035 in)
equipped engine
Piston/cylinder wall
0.12 mm
clearance for 947 DI
(.0047 in)
engine
Ring/piston groove
clearance for 0.048 mm
947 carburetor- (.002 in)
equipped engine
Ring/piston groove
0.044 mm
clearance for 947 DI
(.002 in)
engine
Ring end gap for 947
0.45 mm
carburetor-
(.018 in)
equipped engine
Ring end gap for 947 0.55 mm
DI engine (.022 in)
N.A.: Not Applicable
NOTE: Replacement cylinder sleeves are avail-
able if necessary. Also, oversize pistons of 0.25 mm
(.010 in) are available.
Cylinder Taper
Using a cylinder bore gauge, measure cylinder diam-
eter at 16 mm (5/8 in) from top of cylinder just below
auxiliary transfer port, facing exhaust port. If the dif-
ference between readings exceed specification, cyl-
inder should be rebored and honed or replaced.
04-05-12
TOLERANCES
WEAR
LIMIT
(max.)
0.05 mm 0.1 mm
(.002 in) (.004 in)
0.008 mm 0.08 mm
(.0003 in) (.003 in)
0.20 mm
N.A.
(.008 in)
0.20 mm
N.A.
(.008 in)
0.075 mm 0.20 mm
(.003 in) (.008 in)
0.089 mm 0.20 mm
(.003 in) (.008 in)
0.60 mm 1.0 mm
(.024 in) (.039 in)
0.7 mm 1.1 mm
(.028 in) (.043 in)
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1
A
2
F01D8AA
1. Measuring perpendicularly (90 °) to piston pin axis
2. Auxiliary transfer port
A. 16 mm (5/8 in)
Cylinder Out of Round
Using a cylinder bore gauge, measure cylinder di-
ameter at 16 mm (5/8 in) from top of cylinder. Mea-
sure diameter in piston pin axis direction then per-
pendicularly (90°) to it. If the difference between
readings exceed specification, cylinder should be
rebored and honed or replaced.
A
1
F01D8BA
1. Measuring in piston pin axis
2. Measuring perpendicularly (90 °) to piston pin axis
A. 16 mm (5/8 in)
A
2
SMR2000-046_04_05A.FM