TOHATSU MFS 4 Service Manual page 35

Serviceable limit
0.03 (0.0012)
59.07mm (2.3256in)
0.06mm (0.0024in)
0.06mm (0.0024in)
0.03mm (0.0012in)
58.90mm (2.3189in)
0.150mm (0.00591in)
Top ring 0.10mm (0.0039in)
Second ring 0.09mm (0.0035in)
Oil ring 0.21mm (0.0083in)
0.04mm (0.00157in)
15.97mm (0.6287in)
Top ring 0.50mm (0.0197in)
Second ring 0.70mm (0.0276in)
16.04mm (0.63148in)
0.080mm (0.00315in)
0.70mm (0.0276in)
29.92mm (1.1780in)
0.05mm (0.0020in)
5.45mm (0.2146in)
5.41mm (0.2130in)
5.54mm (0.2181in)
5.57mm (0.2193in)
0.070mm (0.00276in)
0.100mm (0.00394in)
1.8mm (0.0709in)
1.8mm (0.0709in)
33.2mm (1.31in)
28.07mm (1.1051in)
13.950mm (0.5493in)
0.03mm (0.0012in)
4st 4/5/6 2011
Action to be taken
Clean to remove.
Correct. (Use #240 to 400 waterproof sand paper put of the surface plate
to correct. Use #600 to finish.)
Correct or replace if possible.
Clean to remove.
Clean to remove.
Replace if severely damaged on the piston sliding surface,
which cannot be repaired with sand paper of No. 400 to 600, or
if damaged over specified limit.
Correct. (Use #240 to 400 waterproof sand paper put of the surface plate
to correct. Use #600 to finish.))
Replace if under lower limit.
Replace if over upper limit
Clean to remove.
Use waterproof sand paper of No. 400 to 600 to correct if possible, or replace.
Replace if over upper limit.
Replace oil ring when top ring or second ring is replaced.
Replace if over upper limit.
Replace if under lower limit.
Replace if the gap is over specified limit only if cylinder liner wear
is less than specified limit.
Replace oil ring when top ring or second ring is replaced.
Replace if over upper limit.
Replace if over upper limit.
Replace if over upper limit.
Replace if under lower limit.
Replace if over upper limit.
Adjust to specified range
Replace if under lower limit.
Replace if over upper limit.
Replace if over upper limit.
Correct or replace if over upper limit.
Replace if under lower limit.
Replace if under lower limit.
Replace if under lower limit.
Replace if over upper limit.
Check that no pressure leaks through rotating parts, sliding parts and sealing parts.
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