Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 410Get this manual
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NON-BIGFOOT GEAR HOUSING
91-825196
5 Using Drive Shaft Holding Tool to hold drive shaft, torque pinion nut to 50 Ib-ft (67.8 Nm)
Loc!i!e "271"Pinion Nut (Torque to 50 I