1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 185Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 185

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8 Replace drive shaft if splines are worn or twisted9 If bearing surface is damaged, replace drive shaft and corresponding bearingIMPORTANT: Do not tighten vise against drive shaft10 If wear sleeve is