TOHATSU MFS 9.9 Owner's Manual page 42

Serviceable limit
Open even a little at ambient temperature
Because thermostat operates with some time lag, measure the lift of open valve
after maintaining at around 75°C(167°F) for approximately 5 minutes.
3.0mm(0.12in)
If the part is worn, cracked or damaged at the outer ends or at upper of lower lip
16.97mm or less (0.6681in or less)
0.4mm (0.015in)
0.05mm (0.0020in)
0.05mm or less (0.0019in or less)
1.35mm or less (0.0531in or less)
Damaged
7.5mm (0.295in)
0.4mm (0.015in)
0.5mm (0.020in)
97.0mm (3.82in)
100.0mm (3.94in)
Lip is deteriorated, degraded, or damaged, or the tightening margin
is reduced to 0.5mm (0.020in) or less by wear.
4st 9.9/15/20 2008
Action to be taken
Replace if out of specified range.
Replace if under lower limit.
Replace pump case liner and guide plate as a set.
Replace if severely worn.
Replace if severely worn.
Replace if severely worn.
Replace.
Replace if severely worn.
Replace if over upper limit.
Replace if over upper limit.
Adjust or replace.
Replace.
Replace if out of specified range.
Replace if under lower limit.
Replace if severely damaged.
Replace if severely damaged.
Replace if over upper limit.
Replace if over upper limit.
Replace if over upper limit.
Replace if out of specified range.
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