Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 74Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 74

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TIMING AND SYNCHRONIZATION

91-83155

3 Rotate flywheel to bring piston to TDC positionCheck that crankcase covercylinder block TDC mark is aligned with timing mark on flywheel