1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 172Get this manual

1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 172

CYLINDER HEAD
NOTE: When twisting cutter, keep an even downward pressure to prevent chatter marks

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

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