Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 288Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 288

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Motor and Electrical Tests Trim Pump Motor Test
2 Connect 12-lolt supply to motor [positive (+) wi re to blue-white wi re, and negative (-) wire to motor mounting stud (g round) Motor should run