TOHATSU MFS 4 Service Manual page 110

Power Unit
Remove oil feed pump cover O ring 2 carefully.
2
3. Remove oil pump rotors (inner and outer) and oil pump pin,
check rotors 3 for damages, and replace if necessary.
Measure gap a between inner and outer rotors. Replace
4.
outer or inner rotor if the gap is over specified value.
Standard Value:
0.15 mm (0.0059 in)
Functional Limit :
0.2 mm (0.0078 in)
Measure gap b between outer rotor and body. Replace
outer rotor or crank case if the gap is over specified value.
Standard Value:
0.12 - 0.20 mm (0.0047 - 0.0079 in)
Functional Limit :
0.25 mm (0.0098 in)
5. Measure oil pump outer rotor height. Replace outer rotor if
the height is less than specified value.
Standard Value:
5.99 mm (0.2358 in)
Functional Limit :
5.96 mm (0.2346 in)
5-24
2 2
3 3
b b
a a
4st 4/5/6 2011