2004 SR Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 120Get this manual
POWERHEAD INSPECTIONSERVICING iT'OO'Li
Valve seat cutter (NEWAV 122) Valve seat cutter (NEWAV 121) Handle adapter (N-503-1) Solid pilot (N-100-5,52) Handle (N-505)
Contact area too high and too wide on face of valve
1Insert solid pilot and the 45 valve seat cutter2Turn the cutter clockwise, never counterclockwise3Inspect the valve seat widthSee Valve Seat Width on page 6-154If the contact width is too high (or wide) on the valve, use the 15 valve seat cutterIf the contact width is too low (or narrow) on the valve, use the 45 valve seat cutter5After desired seat position and width is achieved, use the 45 cutter very lightly to clean up any burrs