1989 Ski-Doo Repair Manual, Page 183Get this manual

1989 Ski-Doo Repair Manual, Page 183

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Section 02 ENGINE SUbs8ction 07 (683 ENG INE TYPE)
1 Valve piston too far out2 Bend valve rod3 Stuck valve4 Wrong spfing tension5 Clogged passages6 Damaged bellows or clamp(s)ReplaceCleanReplace