1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 167Get this manual
Check Tooth Contact Pattern
1If removed, install gear holder toolSlowly rotate driveshaft CLOCKWISE six turns
2Optimum tooth contact pattern is on convex side of tooth with top of pattern approximately 0.04 in(1 mm) below top of toothThe length of tooth contact pattern should be about V3 of tooth widthImproper Tooth Contact Patterns
[] This example shows top side toe contactTo correct, decrease forward gear shim thickness and slightly increase pinion gear shim thicknessTop side toe contact can result in chipped forward gear tooth []] If bottom side toe contact is noted, increase forward gear shim thickness and slightly decrease pinion shim thicknessBottom side contact may result in chipped pinion tooth