POWERHEAD
CYLINDER HEAD
ASSEMBLY
IMPORTANT:
Camshafts for rope start
or
elec-
tric start models are identified with a mark:
1
1. 1.0 . Mark
00
4
51
8
Model
Identification Mark
Rope
start models
94JO
Electric start models
94J1
Inspect decompression parts on the camshaft
(rope start
models). If abnormal movement is
found,
replace camshaft.
004519
Camshaft Journal Oil Clearance
To
check clearance, measure the following:
•
Camshaft
journal outside diameter (2 locations)
•
Camshaft
holder inside diameter (2 locations)
Camshaft journal outside diameter:
•
Upper
side: 0.9826 to 0.9835 in. (24.959 to
24.980
mm)
•
Lower
side: 0.9039 to 0.9047 in. (22.959 to
22.
980
mm)
144
Camshaft holder inside diameter:
•
Upper side: 0.9843 to 0.9851 in. (25.000 to
25.021
mm)
•
Lower side: 0.9055
to
0.9063 in. (23.000 to
23.021 mm)
Camshaft
journal oil clearance:
• Standard: 0.0008 to 0.0024 in. (0.020 to 0.062
mm)
• Service limit: 0.0039 in. (0.100
mm)
004520
004521
If clearance exceeds service limit, replace
cam-
shaft and, if necessary, cylinder head
and/or
oil
gallery block.
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