TOHATSU MFS 25D Service Manual page 191

Remove the camshaft 8.
4.
Pull out slowly so as not to hit the journals.
Remove the oil seal 9.
5.
Compress the valve spring 0 by using the compressor q,
6.
remove the cotter w, and then remove the valve spring
and valve e.
• Valves, valve springs, and other power unit
related parts should be arranged in the order
they are removed.
• Use an attachment having an inner diameter of
16.5 mm (0.650 in).
• If the valve spring compressor is not used,
place the cylinder head on a folded rag to
prevent valve damage.
Valve Spring Compressor q:
Commercially available item
16) Inspection of Valve Spring
Measure the free length a of the valve spring. Replace if
1.
less than the specified value.
Valve Spring Free Length a: Standard Value
32.85 mm (1.29 in)
Functional Limit:
31.5 mm ( 1.24 in)
4st 25/30 2022
CAUTION
a
5-51
5