Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 451Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 451

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BIGFOOT GEAR HOUSING
Trim Tab Adjustment and Replacement
IMPORTANT: The trim tab is now painted and does NOT aid in protecting the drive shaft housing and gear housing from galvanic corros