1997 Ski-Doo Factory Shop Manual Volume Three, Page 59Get this manual

1997 Ski-Doo Factory Shop Manual Volume Three, Page 59

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Sub-Section 02
ENGINE TYPE SPRING PN WIRE DIAmm (in) FREE LENGTH mm (in) PRELOAD IN (LBF) AT COMPRESSED LENGTH OF 14.7 mm (.579 in) 0.0100 (.00224) 0.0169 (.0038)

420 0.8 2399 40 (.