Governor Shaft; Governor Cup And The Governor Gear - MTD P90 series Shop Manual

P90 Series Vertical Shaft Engines

Governor shaft

To remove or replace the governor shaft:
1. Remove the engine from the equipment that it pow-
ers.
2. Remove the governor arm by following the proce-
dures described in the governor arm section of this
chapter.
3. Remove the sump cover by following the steps
described in Chapter 10: Cam, Crankshaft and Pis-
ton.
4. Remove the hairpin clip from the governor shaft.
See Figure 4.27.
5. Slide the governor arm out of the engine block from
the inside of the engine.
6. Check the movement of the fly-weights and cap on
the governor gear.
7. Install the shaft by following the above steps in
reverse order.
8. Install the engine on the equipment it powers.
9. Test run the engine and adjust the top no load
engine rpms by following the steps described in the
throttle and choke adjustment section of this chap-
ter.

Governor cup and the governor gear

The Governor gear and cup are located inside the
crankcase cover. See Figure 4.28.
The flyweights and the governor cup are interlocked
on this family of engines. The governor gear and cup are
not serviceable. If there is a failure of the governor gear,
cup or flyweights, the sump cover must be replaced as an
assembly.
48
hairpin clip
Figure 4.27
Governor gear
Oil pump
Figure 4.28