2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 147Get this manual
POWERHEAD CYLINDER HEAD
Valve Seat Refacing
WARNING
Lap the valve on the valve seat in two steps: first with coarse grit lapping compound applied to the face, and then with fine grit lapping compound
To avoid personal injury, wear eye protection when using cutterRemove all carbon deposits from the valve and the valve seatUse 45 angle cutter to reface valve seat
IMPORTANT: Turn the cutter in clockwise
direction, NEVER counterclockwiseCheck the valve seat contact width If the width is greater than the specification, reface the valve seat using 15 angle cutter If the width is less than the specification, reface the valve seat using 45 angle cutter againClean up any burrs by using 45 angle cutter very lightly001502