Piston Rings - SeaDoo Rotax 1503 4-Tec 2005 Engine Shop Manual

A. Connecting rod big end bearing
CONNECTING ROD BIG END DIAMETER mm (in)
SERVICE LIMIT
CONNECTING ROD BIG END
CLEARANCE mm (in)
SERVICE LIMIT
Use NEW bearings no. 12, when connecting rod
big end diameter is out of specification.
Piston
Inspect piston for scoring, cracking or other dam-
ages. Replace piston and piston rings if neces-
sary.
Using a micrometer, measure piston at 18 mm
(.709 in) perpendicularly (90°) to piston pin axis.
SMR2005-037
45.080 (1.774)
0.09 (.0035)
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Section 01 ENGINES (1503 4-TEC)
Subsection 07 (CYLINDER BLOCK)
1. Measuring perpendicularly (90°) to piston pin axis
A. 18 mm (.709 in)
The measured dimension should be as described
in the subsequent table. If not, replace piston.
PISTON MEASUREMENT mm (in)
NEW NOMINAL
SERVICE LIMIT
Piston/Cylinder Wall Clearance
Adjust and lock a micrometer to the piston dimen-
sion.
1. Micrometer set to the piston dimension
With the micrometer set to the dimension, adjust
a cylinder bore gauge to the micrometer dimen-
sion and set the indicator to 0 (zero).
99.951 to 99.969
(3.935 to 3.936)
99.80 (3.929)
95