CV15S High RPM problem

[arch252]

I adjusted the governor rod, it only rotates about 45 degrees, I had it all the way to the right so i turned it counterclockwise until it was horizontal to match the linkage on my other mower. Really didn't make any difference. I noticed that the plastic clip that holds the linkage rod that connects the top of the L bracket (and goes to the carb) was worn and had excess play in it. I replaced that clip and it helped. I can now idle it down very low but for normal operation I have to put the throttle lever at the halfway point. If I move it to full throttle it is dangerously high RPM. When I back the throttle down it does not want to respond so I have to manually push the L bracket back to reduce RPM's. It will then hold it at the lower RPM unless or until I increase the RPM with the throttle lever.

Could this be an issue with the internal governor gear or does this sound like a linkage adjustment issue?

I have drained the oil twice and I've not seen any plastic bits that might be a sign of a damaged governor gear.

When I engage the PTO I have to manually increase the throttle to compensate for the loss of power.

 

[arch252]

I took the engine off and opened it up. The governor gear cap had unseated. I put it back in place and closed it up. Hope to get the engine back on tomorrow and test it out.

 

[grumpyunk]

Now you know why you got such a good deal. Follow the manual to make sure the governor arm allows full open throttle with all the slack taken out of the linkage. I would inspect the govern retainer very closely as it should not be able to come apart as yours did. The gizzards sure look nice and clean.
Remember that the governor is just fighting the spring that is connected to the throttle control. If the spring is under more tension (rabbit/fast) the governor has to work a bit more to close the throttle. If under low tension(idle) the governor has it easy to keep the throttle plate closed, or close to it. If there is excessive play in all the linkage, the governor will/can cause the speed to 'hunt' as things get out of 'synch', and the governor chases the throttle plate back and forth. A very narrow spring with hooks on both ends may be used to keep the slack out of the governor linkage, model and carb dependent.
tom

 

[arch252]

Great info Tom, thanks! Had it together yesterday and with a few adjustments to the linkage it is running and responding great. Hard to start initially but I may have weak gas, underpowered battery or worst case I need to clean the carb again but I'll work that out. It is idling great and running strong. I just rebuilt the deck and will put it back on today and then the real test, to make sure the engine compensates correctly when the PTO engages.