2001 Ski-Doo Factory Shop Manual Volume One, Page 135Get this manual

Subsection 04
Section 04 ENGINE (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)

USED PISTON MEASUREMENT
Using micrometer, measure piston at perpendicularly (90) to piston pin
F00D0EA

1Piston dome 2Piston measurement
F01D0NA

Adjust and lock micrometer to the specified value on the piston dome1

1Measuring perpendicularly (90) to piston pin axis ASee table below

ENGINE TYPE 377 and 443 503 593

DIMENSION mm (in) 20.8 (.819) 18.0 (.709) 25.57 (1.004)

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives