MTD AC3 - Manual (Page 56)

AC3 Series of Engines
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5. Remove the clutch rotor with a clutch removal tool.
NOTE: Older engines will have a larger clutch that
has roughly a 2 7/16” diameter. They can be
removed with part number 791-180918 or
the newer clutch tool part number 797-
00062. See Figure 7.8.
NOTE: New engines use a smaller clutch, with
roughly a 1 15/16” diameter. They can be
removed by using clutch tool number 797-
00070.
6. Install the clutch rotor.
NOTE: The big washer goes between the rotor and
the starter housing. See Figure 5.0.
NOTE: The lettering on the rotor must face away
from the engine. The thrust washer is placed
on top of the rotor. See Figure 6.0.
7. Torque the rotor to 100-150 in. lbs.(11.3-16.9 Nm).
8. Slide the clutch drum onto the crankshaft and
tighten it to a torque of 38-40 in. lbs.(4.3-4.5 Nm).
9. Install the clutch housing and the upper drive shaft
following the steps mentioned earlier in reverse
order.
10. Test run the engine/trimmer before returning it to
service.
Figure 7.8
Part number
791-180918
Big washer
Figure 5.0
Figure 6.0
Lettering
Thrust washer