1984 Ski-Doo Shop Manual, Page 123Get this manual
SECTION 02 ENGINE SUB-SECTION 06 (503 ENGINE TYPE)
7Crankcase lower half
2Crankcase upper half 3Lockwasher mm (74)
4Screw MB 70 (6) 5Screw MB 45 (B) 6Loctite 575 7Stud MB 773 (B) BCable grommet Rubber plug (5) 70Crankshaft
7 77273747576
Ball beanng 6206 (2) Shim mm (2) Spacer Seal PT0side Ball bearing 6207 G'ring Seal mag side Woodruff key Loctite 242
CLEANING
Discard all seals, gaskets and "0" rings Clean all metal components in non-ferrous metal cleanerRemove old sealant from crankcase mating surfaces with Bombardier sealant stripper_ CAUTION: Never use sharp object to scrapeaway old sealant as score marks incurred are detrimental to crankcase sealingMEASUREMENTS
TOLERANCES FITTING NEW PARTS (MIN (MAX N.A NA WEAR LIMIT
Crankshaft deflection Connecting rod big end axial play
.08 mm (00311.0 mm (0394")
.20 mm (0079")