Generac Impact plus-36 plus II, Mo#00941-2

helplease wrote:
To: j-d & nralifr, Thanks for all of your input it is much appreciated. I will systematically try your suggestions. Forgive me, I am new to this site and protocal. nrailer, I just acquired the same LANCE camper, 2003 model. Thanks to all, helplease

Welcome to the site, and congrats on the new camper. I've owned mine for about 10 years now and I still like it a lot! Join us on the Truck Camper section of the forum as well.

The inverter that's part of your generator is in the step below the dinette slideout.

:):)

To: j-d & nralifr, Thanks for all of your input it is much appreciated. I will systematically try your suggestions. Forgive me, I am new to this site and protocal. nrailer, I just acquired the same LANCE camper, 2003 model. Thanks to all, helplease

There are several things that can cause the gen to shutdown after start. Is it over speeding? I believe the over speed shutdown is at 4500 rpm.

Is the oil level good? Another thing that would shut it down with the delay you describe is not detecting good oil pressure. The low oil pressure switch (which is normally open) and oil over temp switch which is normally closed) are wired in series, and there is a built in delay at start up to let the oil pressure build up.

You'll need to download the service manual in order to check all the possibilities that could cause the shutdown, but checking the oil pressure and over temp switches is one of the easiest. On my 941-2, behind the air filer there's a wire harness with an unused 2-pin plug, and two single-pin plugs that are in use. The single-pin plug that has purple wires on both sides is for the oil pressure and over temp switches. Unplug it, and if the generator starts and stays running, one of those switches is bad (provided the oil level is good). If either switch is bad, order both and replace them because you'll have to remove the generator from the RV to get to them.

Some other things that can cause this:
Stuck throttle (watch the throttle to see if it moves)
Bad throttle stepper motor or faulty connection to the motor
Loss of connection from the generator control board to the remote mounted inverter (did you know that an inverter is part of this generator?)
Stator timing winding open or shorted

If I remember right, one of the isolation aids for this type of problem is to turn off CB1, and then start the generator. If it runs normally, turn CB1 back on. If it shuts down after a 5-7 second delay, that indicates a problem with the inverter, or with the connection between the generator and inverter.

I hope it's a simple and inexpensive fix for you. Bad inverters or stators aren't cheap to fix. The service manual is pretty good, but it is a complex, electronically controlled unit that may exceed the average owners skill level to service.

:):)

Thanks for including the Model Number information. Lots of folks forget or just don't know how important it is. Repeated here in case somebody misses it in Title:

Impact plus-36 plus II, Mo#00941-2

We have many more Onan Helpers than Generac Helpers, so I hope somebody will be able to lend a hand. Meanwhile, smokstak.com has a Generac section...

Moved from Forum Technical Support

I recently bought this camper. Everthing works relatively well. I have two full LP tanks. I did light the 3 stove burners, they work fine and the oven as well. "seems to be getting fuel" After the gernerator dies it will start again immediatly. Thanks for the suggestion. I was thinking about tapping the regulator at the gen. with a rubber hammer. (lightly). The gen. has not been run in quite some time. Oh, I checked the oil level.....

Do you have any other propane item that is fed from the same regulator that is supplying the generator? For example, if you start your stove burner on high, does it burn brightly but after 6 seconds it sort of peters out?

I think your problem smells like a fuel problem - possibly a regulator. You do have a reasonably full tank of propane....right?