Replacing The Valve Guide; Checking The Valve Seat - SELVA MARINE Pike 9,9 Service Manual

POWR
2. Calculate the valve-stem-to-valve-guide
clearance as follows. Replace the valve
guide if out of specification.
Valve-stem-to-valve-guide clearance
= valve guide inside diameter – valve
stem diameter:
Intake:
0.010–0.037 mm
(0.0004–0.0015 in)
Exhaust:
0.025–0.052 mm
(0.0010–0.0020 in)

Replacing the valve guide

1. Remove the valve seal.
2. Remove the valve guide 1 by striking
the special service tool 2 from the com-
bustion chamber side.
1
Valve guide remover/installer 2:
90890-06801
3. Install a new valve guide 3 using the
special service tool 2 from the camshaft
side to the specified height a.
3
E
5-31
Power unit
2
S6AU5086
2
a
S6AU5087
NOTE:
Apply engine oil to the surface of a new valve
guide 3 before installation.
Valve guide remover/installer 2:
90890-06801
Valve guide height a:
Intake and exhaust:
8.05 ± 0.25 mm (0.32 ± 0.01 in)
4. Insert the special service tool 4 into the
valve guide 3, and then ream the valve
5
guide.
3
NOTE:
• Apply engine oil to the inner surface of the
valve guide before reaming it.
• Turn the valve guide reamer clockwise to
ream the valve guide.
• Do not turn the reamer counterclockwise
when removing it.
• Be sure to clean the valve guide after ream-
ing it.
Valve guide reamer 4: 90890-06804
5. Measure the valve guide inside diameter.
Valve guide inside diameter:
Intake and exhaust:
5.500–5.512 mm
(0.2165–0.2170 in)

Checking the valve seat

1. Eliminate carbon deposits from the valve.
4
E
S6AU5088
5
6AU3K11