TOHATSU MFS 25D Service Manual page 74

Maintenance
3. Remove the lower unit installation bolts and pull down the
lower unit assembly 3 to remove it.
Remove the pump upper case 4.
4.
Remove the impeller 5 and check it.
5.
6. Check the pump case (upper) to see if there is any
deformation. Replace if necessary.
Check the impeller and pump case liner 6 for any cracks
7.
and wear. Replace if necessary.
Check key 7 and drive shaft groove a for wear. Replace
8.
if necessary.
9. Reinstall the removed component. Refer to Chapter 6 for
details.
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