Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 185Get this manual

Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 185

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GEAR HOUSING

1 Remove (and isolate) spark plug lead from spark plug
2 Shift outboard into Reverse gear3TIlt (and lock) outboard to full "Up" position4 Remove plug (a)5 Loosen bolt (