1997 Ski-Doo Factory Shop Manual Volume One, Page 84Get this manual
Sub-Section 04
Section 03 ENGINE (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
Measuring (On bench)
Once engine is disassembled, check crankshaft deflection on V-shaped blocksIf deflection exceeds the specified tolerance, it can be worn bearings or bent crankshaftRemove crankshaft bearings and check deflection again on V-shaped blocks to determine the defective part(s)See measurement in following illustration
If the deflection exceeds the specified tolerance, crankshaft should be repaired or replaced
CONNECTING ROD BIG END AXIAL PLAY
ENGINE TYPE 277, 377 443 and 503 NEW PARTS MIN MAX0.20 0.53 mm (.008 .021 in) WEAR LIMIT 1.00 mm (.039 in)
Using feeler gauge, measure distance between thrust washer and crankshaft counterweightIf the distance exceeds specified tolerance, repair or replace the crankshaftA01C0RA