Sea-doo RX - Page 85

Section 04 ENGINE
Subsection 05 (TOP END)
04-05-12 SMR2000-046_04_05A.FM
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.
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.
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.
1. Measuring in piston pin axis
2. Measuring perpendicularly (90°) to piston pin axis
A. 16 mm (5/8 in)
ENGINE
MEASUREMENT
TOLERANCES
NEW PARTS WEAR
LIMIT
(min.) (max.)
Cylinder taper N.A.
0.05 mm
(.002 in)
0.1 mm
(.004 in)
Cylinder out
of round
N.A.
0.008 mm
(.0003 in)
0.08 mm
(.003 in)
Piston/cylinder wall
clearance for
947 carburetor-
equipped engine
0.09 mm
(.0035 in)
N.A.
0.20 mm
(.008 in)
Piston/cylinder wall
clearance for 947 DI
engine
0.12 mm
(.0047 in)
N.A.
0.20 mm
(.008 in)
Ring/piston groove
clearance for
947 carburetor-
equipped engine
0.048 mm
(.002 in)
0.075 mm
(.003 in)
0.20 mm
(.008 in)
Ring/piston groove
clearance for 947 DI
engine
0.044 mm
(.002 in)
0.089 mm
(.003 in)
0.20 mm
(.008 in)
Ring end gap for 947
carburetor-
equipped engine
0.45 mm
(.018 in)
0.60 mm
(.024 in)
1.0 mm
(.039 in)
Ring end gap for 947
DI engine
0.55 mm
(.022 in)
0.7 mm
(.028 in)
1.1 mm
(.043 in)
A
F01D8AA
1
2
A
F01D8BA
A
1
2
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