SELVA MARINE Fin Whale 225 EFI, Service Manual

Page: 126 / 399

POWR
Power unit
5-25
6AL3J11
Checking the camshaft
1. Check the edge and face of the brim on
the port camshafts and starboard intake
camshaft that is used for the cam posi-
tion sensor. Replace if rough, damaged,
or scratched.
NOTE:
• Do not scratch or damage the face of the
brim.
• If there is a scratch more than 0.2 mm
(0.008 in) deep or more than 0.5 mm (0.020
in) wide on the surface of the brim, a mal-
function may occur in the cam position sen-
sor signal.
2. Measure the cam lobe. Replace if out of
specification.
3. Measure the camshaft runout. Replace if
above specification.
4. Measure the camshaft journal diameter
c
and cylinder head journal inside diam-
eter
d
. Replace the camshaft or cylinder
head assembly, or both if out of specifi-
cations.
S6AL5G50
Cam lobe
a
:
Intake:
46.30 – 46.40 mm
(1.823 – 1.827 in)
Exhaust:
45.35 – 45.45 mm
(1.785 – 1.789 in)
Cam lobe
b
:
Intake and exhaust:
35.95 – 36.05 mm
(1.415 – 1.419 in)
Camshaft runout limit:
0.015 mm (0.0006 in)
S6P25560
S6AL5240
d
c
c
d