Propane gennie maintenance in cold winter

I have a Bigfoot trailer with the Onan 2500LP. It too proved hard starting. I did a short YT video on my fix.

My YouTube video on my Onan 2500LP starting issues.

Charles

Slymer wrote:
I have tried quick start fluid, with no luck, but this is not an engine. It is a built-in propane generator. Definitely getting spark and all other appliances are getting propane but it appears the generator is not. I have managed to get a couple of hoses off & blow them out. Still no luck. Just cranks over & over.
Got it running about a month ago, finally,.....but now again no luck.

This does not sound like winter maintenance issues as much as you need to get the generator running correctly.

If you have checked the basics.... might be time to get service. If you start every 6 days or 6 months it should start fairly easy.

Slymer wrote:
I have tried quick start fluid, with no luck, but this is not an engine. It is a built-in propane generator. Definitely getting spark and all other appliances are getting propane but it appears the generator is not. I have managed to get a couple of hoses off & blow them out. Still no luck. Just cranks over & over.
Got it running about a month ago, finally,.....but now again no luck.

I know you have spent hours scouring the Internet, so this may be info you already know...

- The vent tubes are known to attract nesting insects. I am not sure exactly what problem that causes, but I suspect there is some sort of vacuum signal that is not longer accurate and thus causes a bad fuel mixture. This seems a possibility given it was running fine, and the only thing it did was sit.

- I have had trouble getting mine to run if the air filter is not seated perfectly. And it is a craptastic design that is very difficult to get in place with the cover properly sealed down. Seems I had to tape mine in place one time to get it to idle properly. Very fussy about ambient air pressure - won't run without an air filter in place.

- I also had a problem where the propane continued to refine in the lines. Propane is a byproduct of natural gas and petroleum refining. It morphed back to oil in my lines. That oil went to the lowest point of the system - the generator feed line. Messed up the carb pretty good. Ended up capping all the lines off at the appliances (delicate diaphragms), then individually opening them and blowing them out with brake clean & compressed air. I revised the propane lines to include a T-trap which I can drain out a few drops of oil now and then.

HTH!
-Eric

double post

Slymer wrote:
this is not an engine. It is a built-in propane generator.

???

The generator has an engine in it. That's what turns the propane into spinny force what waves magnets past each other to tickle the angry pixies and make the lights come on.

It is an engine like any other engine.

If it is not firing with starting fluid- it has to be spark, or lack of it.

Slymer wrote:
I have tried quick start fluid, with no luck, but this is not an engine. It is a built-in propane generator. Definitely getting spark and all other appliances are getting propane but it appears the generator is not. I have managed to get a couple of hoses off & blow them out. Still no luck. Just cranks over & over.
Got it running about a month ago, finally,.....but now again no luck.

Oops my bad I thought it was an engine driven generator like my Onan.

If there is no fuel a safety shut off valve is not energizing to open as mentioned, or the supply line or filter could be plugged.

Ours when setting the connections to the fuel solenoid lose connection (corrosion).
If I don't hear a loud click (solenoid opening) I stop & go clean the terminals to regain contact.

I have tried quick start fluid, with no luck, but this is not an engine. It is a built-in propane generator. Definitely getting spark and all other appliances are getting propane but it appears the generator is not. I have managed to get a couple of hoses off & blow them out. Still no luck. Just cranks over & over.
Got it running about a month ago, finally,.....but now again no luck.

Slymer - Compression, fuel & air in roughly the correct ratio, spark, and sufficient cranking speed and the engine will start.

Propane mixture in cylinder has a higher resistance to ignition than liquid droplet fuel (gasoline) One thing to check is the plug gap is in spec for propane. This is more of an issue under heavy load.

I still suspect fuel starvation.... if you give the engine a little whiff of starting fluid does it fire and try to run?