Refacing The Valve Seat - SELVA MARINE Pike 9,9 Service Manual

2. Apply a thin, even layer of Mechanic's
blueing dye (Dykem) onto the valve seat.
3. Press the valve lightly against the valve
seat with a valve lapper as shown.
4. Measure the valve seat contact width a
where the blueing dye is adhered to the
valve face. Reface the valve seat if the
valve is not seated properly or if the valve
seat contact width is out of specification.
Check the valve guide if the valve seat
contact is uneven.
6AU3K11

Refacing the valve seat

1. Reface the valve seat with the valve seat
cutters.
S6AU5089
S68V5720
Valve seat contact width a:
Intake and exhaust:
0.6–0.8 mm (0.024–0.031 in)
Valve seat cutter holder:
90890-06316
Valve seat cutter:
30° (intake): 90890-06328
30° (exhaust): 90890-06815
45° (intake): 90890-06312
45° (exhaust): 90890-06814
60° (intake): 90890-06315
60° (exhaust): 90890-06813
Cylinder head
1
5
2
3
4
5
6
7
8
9
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