1989 Ski-Doo Repair Manual, Page 55Get this manual
Section 02
Sub-section 02
(253 ENGINE TYPE)
7Imegral cylinder head 2Spring bracket 3Lock washer mrn 4Screw M6 72 5Injection fitting 6Head cylinder gasket 7Stud MB 75B.5 (4) BLock washer 8.4 mm (4)
9Nut MB (4) 70Circlip (2) 7Semi-trapez ring 72Rectangular ring 73Piston 74Gudgeon pin 75Needle bearing
NOTE: Engine must be removed from chassis to perform the following procedures
DISASSEMBLY
10,13,14, Circlip, pistongudgeon pin
Place clean cloth over crankcase to prevent circlips from falling into crankcaseWith pointed tool inserted in piston notch, remove circlips from piston To remove piston pin, usc" piston pin puller (P529 0068 00) as follows- Fully screw puller handle- Place stop notch of puller in line with the puller axis- Insert puller end into piston pin- Rotate stop notch of puller so that corners protude the puller endRotate so that corners protude