I have a Troybilt Horse restored engine rebuild total. Runs magnificently however I think the governor is lame. Lose 300 rpm under normal load. I have a new governor gear in it, and am set up per the book on governor adjustment. New spring, New Carb, the whole 9 yards. What am I missing here. Have felt paddle against governor pin action too. So I think I am set up correctly. Puzzling. Any comments or suggestions are well taken. Al
- Thread starter davbr
- Start date
Janicholson
Well-known Member
The type of governor they use is not sensitive. 200 seems a lot, but may actually put the engine into its power
band. Electronics are wonderful, and cruse control systems work to the mph. Not so much a flyweight governor. Jim
band. Electronics are wonderful, and cruse control systems work to the mph. Not so much a flyweight governor. Jim
Steve@Advance
Well-known Member
You can easily test the function of the governor.
Look at the throttle assembly on the carb. From idle to wide open, the throttle shaft needs to turn approximately 90*.
Now start the engine, set the speed for low idle where the throttle is against the idle stop screw.
Then suddenly push the dash lever to full speed and watch the throttle. It should go to full wide open for just a second, then return to maintain the governed speed as the engine comes up to speed.
If it doesn't go fully open, the GOVERNOR LINK needs to be adjusted.
Also check that the engine runs at 3600 RPM (or whatever the book calls for) when at full speed. If not, the GOVERNOR SPRING needs adjusting.
You can play with the linkage with it running. Have it running at full speed, push the throttle closed and release when it gets to idle. It should instantly spring to wide open, then govern back down.
You can also watch what happens under load. Have the engine running at any speed as long as it's well above idle. Put a load on the engine, as in engaging the PTO. The throttle should go to full open until it reaches the set RPM.
Look at the throttle assembly on the carb. From idle to wide open, the throttle shaft needs to turn approximately 90*.
Now start the engine, set the speed for low idle where the throttle is against the idle stop screw.
Then suddenly push the dash lever to full speed and watch the throttle. It should go to full wide open for just a second, then return to maintain the governed speed as the engine comes up to speed.
If it doesn't go fully open, the GOVERNOR LINK needs to be adjusted.
Also check that the engine runs at 3600 RPM (or whatever the book calls for) when at full speed. If not, the GOVERNOR SPRING needs adjusting.
You can play with the linkage with it running. Have it running at full speed, push the throttle closed and release when it gets to idle. It should instantly spring to wide open, then govern back down.
You can also watch what happens under load. Have the engine running at any speed as long as it's well above idle. Put a load on the engine, as in engaging the PTO. The throttle should go to full open until it reaches the set RPM.
TomA in CA
Member
My suggestion is to repower it with a
Harbor freight preditor engine. I
have put them on two Troy bilt
horses. They fit perfectly, start
first time, run any speed you want,
lots of power. Save that old Briggs
for some other project.
Harbor freight preditor engine. I
have put them on two Troy bilt
horses. They fit perfectly, start
first time, run any speed you want,
lots of power. Save that old Briggs
for some other project.
I've been told before this engine does not have a huge swing in governor adjustments when running. you would at least think when you bury the tines and lean on the handles it would rev a little bit. It doesn't bog completely. There is a point it will hold its own but its down 300 rpm at that point.
Janicholson
Well-known Member
Governors do not cause reving. They open the carb related to RPM drop only. Electronic controls are often stable with only a few RPM. If the throttle plate is opening up, that is all you can expect. Jim
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