1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 207Get this manual

1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 207

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POWER TRIM
Electrical Troubleshooting
CONDITION OF TRIM SYSTEM ATrim motor does not run when trim button is depressedBTrim system trims opposite of buttonsPROBLEM 1, 2, 4, 5, 6, 7, 3