Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 277Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 277

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Filling and Bleeding the Power Trim System Checking Oil Level and Filling
IMPORTANT:FillVent" screw (8) must be backed oul 1-1 2 turns from sealed position to vent the pump

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