Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 399Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 399

NON-BIGFOOT GEAR HOUSING
Shift Shaft
1Inspect shift cam for wear or gallingReplace cam if necessary2If cam is worninspect cam follower in end of propeller shaft for wear
a Cam FollowerShiH Cam 3Inspect shift shaft boot for deterioration4Inspect shift shaft carrier o-ring for cuts or abrasionsIt is good service procedure to replace all o-rings, seals and gaskets regardless of appearance

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