Inspection Of Valve Spring - TOHATSU MFS 9.9 Owner's Manual

Compress valve spring 5 using a commercially available
12.
valve spring compressor 6, remove cotter 7, and then,
remove spring 5 and valve 8.
Valves, springs and other related parts should
be arranged in the order they are removed.
Remove stem seal 9.
13.

12) Inspection of Valve Spring

Measure valve spring free length a. Replace if the length is
1.
less than specified value.
Valve Spring Free Length a : Standard Value
35.0 mm (1.38 in)
Functional Limit :
33.5 mm (1.32 in)
Measure valve spring inclination b. Replace if it is over
2.
specified value.
Valve Spring Inclination Limit b :
1.5 mm (0.06 in)
4st 9.9/15/20 2008
6
a
b
7
5
9
8
5
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