SELVA MARINE Kingfish 25, Service Manual

Page: 193 / 398

7-45
POWR
Power unit
Checking the camshaft
1. Measure the cam lobe height
a
and
width
b
.
2. Measure the camshaft runout.
3. Measure the camshaft journal diameters
c
and
d
, and the cylinder head journal
inside diameters
e
.
4. Check the automatic decompression
actuators
f
. Replace the camshaft if
damaged or worn. (Manual starter
model)
Checking the spark plug
1. Clean the electrodes
a
with a spark plug
cleaner.
Rocker arm inside diameter
b
:
16.000–16.018 mm (0.6299–0.6306 in)
Rocker arm shaft diameter
c
:
15.971–15.991 mm (0.6288–0.6296 in)
Cam lobe height
a
:
Intake:
30.839–30.939 mm (1.2141–1.2181 in)
Exhaust:
30.937–31.037 mm (1.2180–1.2219 in)
Cam lobe width
b
:
Intake and exhaust:
25.950–26.050 mm (1.0217–1.0256 in)
c
a
b
b
a
Camshaft runout: 0.030 mm (0.0012 in)
Camshaft journal diameter
c
:
36.925–36.945 mm (1.4537–1.4545 in)
Camshaft journal diameter
d
:
36.935–36.955 mm (1.4541–1.4549 in)
Cylinder head journal inside diameter
e
:
37.000–37.025 mm (1.4567–1.4577 in)
c
d
e
e
f