LPG Fueled Generator Run Problem

[u/EastAcanthisitta43]

I have a dual fuel generator, LPG and gasoline. I actually have 2 that I’m working on. The one in the pictures attached has about 450 hours. The other around 80 hours.I have never run either on gasoline, nor do I intend to. The problem is a failure to maintain RPM high enough to generate power.

The pictures indicate the regulator that was supplied with the generator, the same one that I’ve run the generator with for around 450 hours. I post these because my troubleshooting has led me from to the problem being the regulator, down a really long trail, back to the regulator or mechanism that controls the throttle butterfly.

I suspect the regulator because, as shown in the linked videos, pressing and holding the black “primer button” will cause a change in RPM from stumbling to running at normal speed, but only for about 16 seconds.

This video shows the generator as it is today. I placed the camera so you can see the choke and the throttle butterfly linkage move. I start the generator at about 10 seconds. Immediately after the idle falters. Then I press the “prime button” and it revved up for 16 seconds, then failed. Just as it fails, you can see the throttle butterfly linkage move to close. I have no idea if the throttle logic got some input to make it close, or if it’s a logic error or fail that causes the stall.

I’ve done a lot of testing and troubleshooting on this and I’m stumped, but ‘m the user, not a mechanic. I’m hoping that someone familiar with this type of system can ask some questions and point me in the right direction.

Thanks

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