Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 478Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 478

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BIGFOOT GEAR HOUSiNG
60 Ibin(6.8 Nm)

NOTE: It;s recommended that the gearcase be pressure tested for leaks after reassembly and BEFORE gear lube is addedGearcase should hold 10 to 1