Checking The Cylinder Head; Checking The Valve Spring - SELVA MARINE Wahoo 15 Service Manual

NOTE:
Be sure to keep the valves, springs, and
other parts in the order as they were
removed.
Valve spring compressor 9:
90890-04019
Valve spring compressor
attachment 0: 90890-06320

Checking the cylinder head

1. Eliminate carbon deposits from the com-
bustion chambers and check for deterio-
ration.
2. Check the cylinder head warpage using a
straightedge 1 and thickness gauge 2
in the directions shown. Replace the cyl-
inder head assembly if above specifica-
tion.
2
Cylinder head warpage limit:
0.10 mm (0.0039 in)

Checking the valve spring

1. Measure the valve spring free length a.
Replace if below specification.
6AG3J11
5
2. Measure the valve spring tilt b. Replace
1
S6AG5260
S6AG5270
5
a
Valve spring free length a:
32.63 mm (1.2846 in)
if above specification.
Valve spring tilt limit b:
1.4 mm (0.055 in)
Cylinder head
1
2
S68V5775
3
4
5
6
7
8
9
5-38