1985 Ski-Doo snowmobile Service Manual, Page 31Get this manual
Section 02 ENGINE Sub-section 01 (247 ENGINE TYPE)
CLEANING
Discard all oil seals and gasketsClean all metal components in non-ferrous metal cleanerMEASUREMENTS
TOLERANCES FITTING NEW PARTS (MAX (MIN NA
.20 mm 10079") 20 mm (0079")
WEAR LIMIT
DISASSEMBL Y
General
To remove drive pulley, refer to "Drive pulley", section 03-03To remove magneto, refer to "Magneto" in this section
Crankshaft dellection Connecting rod big end axial play Crankshaft end play
53 mm (0208") .40 mm (0158"1
.10 mm (0039") 10 mm (0394")
111, Crankcase halves
When disassembling crankcase halves, do not heat the crankcaseIf heat is necessary, temperature must not exceed 55C (130F