[stu]

Requesting some help please.

My generator will start right up, run at a very high sounding idle and then shut down. If I load it before it shuts down it will stay running and maintains good voltage. As soon as I unload it, it revs back up to a high rpm idle and will shut down.

Good oil, good gas, throttle linkage seems to operate freely, no air leaks that I can tell. I was trying to pull pilot jet and clean it and it broke. So, now I'm waiting on parts.

Any ideas???

Stu

 

[stu]

EG4000cl, sorry for typo.

 

[OrlyP]

If you have a multimeter with a frequency (Hz) measurement function or an engine tachometer (RPM), adjust the speed governor adjustment screw so the engine runs at 3660-3720 RPM or 61-62 Hz. Turning this screw counter-clockwise will decrease engine speed, and vice versa.

Also make sure that the idle screw (black screw above the carb) is not screwed too far inward. Doing so will allow it to cause interference with the throttle. In other words, if the idle set screw is set too far in, it will prevent the speed governor from slowing down the engine. If your generator does not have an auto-idle switch, just turn this screw clockwise just far enough for its threads to catch and for the screw to not fall off.

 

[stu]

Thanks I will try this soon. I will post results when done.

 

[stu]

i installed the pilot jet that broke while removing it. part #99204-ZE00380. I cant keep the generator running long enough to get any sort of tell. I'm a bit confused. I took the carb off to inspect and everything is clean. it starts, runs up high and then shuts off.

 

[stu]

i also checked the idle crew as suggested, when i installed the new jet, i only replaced the screw enough to not stick out the back.

 

[OrlyP]

Based off your original post, I think that the generator is detecting that it's running too fast and shuts it down to protect it.

Before starting, have you attempted to reduce the speed using the speed governor set screw (first pic on post #3)? Try turning this screw a couple of times counter-clockwise. Start it without anything plugged in and see if it still shuts down. Using whatever tool you have, measure the engine RPM or output frequency (Hz) and post it here.

Posting a video of it running and then stopping might also be helpful.

 

[stu]

First, thanks for helping out!

My home Fluke 322 meter is a basic clamp-on with no Hz capability. I will have to snag another from work. I did try what you had suggested--I gave the screw a couple turns before starting attempting to slow things down. It started right away, 2nd pull, revs up high and now it seems unsteady, surging. Did not stay running long at all. Almost seems too rich but not sure so I attempted to return to where I thought it was before. I had the carb off and its very clean. I did not take the bowl apart because it looked so clean, I just replaced the idle jet. I suppose I can do that and inspect the float and main jet but nothing leads me to believe that would be an issue. I also took the gas cap off thinking it may not be venting, no difference.

Ill try to get some videos tonight.

 

[Dutchy491]

You stated “good gas” in the original post. What do you mean when you say that? Also do you drain the carburetor after use and before storage? Running the carburetor empty until the engine quits …isn’t empty as in dry empty. If the carburetor linkages are working properly, governor included, you’ve got gunk/dirt speck somewhere. Give the carburetor an ultrasound cleaning to be sure…

 

[stu]

Thanks Dutchy491, i appreciate your comment. What i mean is that its about 2 month old non-ethanol that had sta-bil added. When i put it away last winter i drained the fuel from the tank and carb after i ran it dry. With some seafoam.

I can go through the carb again i guess. maybe pull the main jet.

 

[Dutchy491]

Cool, if that's the case the carb should be clean. Is the governor linkage correctly situated and working? Check springs etc and to see if the linkage is all attached at the correct contact points...

 

[Matt88-8]

Really sounds like something in the governor linkage is seized or missing a spring.

Was anything done to the machine prior to this issue, or was it running well last time it was out?

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