Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 124Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 124

CYLINDER HEAD
NOTE: If resurfacing the valve seats is required, resurface the valve seats to the specified angle shown in chart

Valve Seat Angle Specifications 15 45 60

CORRECT VALVE SEAT POSITION

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