1979 Ski-Doo Supplementary Shop Manual, Page 52Get this manual
SECTION 04 SUB-SECTION 01 (ENGIN TOLERANCES MEASUREMENT)
CRANKSHAFT END-PLAY
Maximum: 0.10 mm (.004")
NOTE: Crankshaft end -play is adjusted only when crankshaft andor crankcase is replace
Measuring distance between crank shaft bl ades
One cylinder engine (247)
Maximum crankshaft end -play should be 0.10 mm (.004")To determine necessary correction: a) Measure crankcaseTo do this first measure each half from mating surface to bottom of bearing seatAdd measurements of both halves then add 0.15 mm (,006") for gasket displacementEquals Ac) Subtract measurement from measurement minus tolerance of 0.10 mm (,004") maximumTotal balance is distance to be shimmedShim(s) must be located between magneto side bearing and crank shaft blade
Two cylinder engines
(248, 294, 343, 402, 440, 640)
ENGINE TYPE BEARING SIMULATOR NO420 876380 AVAILABLE SHIMS