1985 Ski-Doo snowmobile Service Manual, Page 204Get this manual
Section 02 ENGINE Sub-section 10 (ENGINE DIMENSIONS MEASUREMENT)
CRANKSHAFT DEFLECTION
ENGINE TYPE
247 All other 1985 engines
MAXIMUM
0.10 mm 100039") 0.08 mm (00031")
, fb-AOO1002028
Turn crankshaft on "V" shaped blocks; using dial indicator measure deflection on each side as illustratedIf deflection exceeds specified tolerance, the crankshaft should be repaired or replaced
CRANKSHAFT END-PLAY
247 engine type
ENGINE TYPE
MINIMUM
020 mm (008")
MAXIMUM
040 mm (.016" )
Adjustment
Crankshaft end-play is adjusted with shims located between crankshaft and magneto side bearingMeasure at mm 11.j' 'I from the edge