ONAN - LP Liquid Genset not starting

Thanks, all for the posts.

I've checked a few things, and have the following to report.
* LPG Fuel tank is 3/4th full.
* I checked for the valve at the tank and it seems OK.
* As far as I know, there are no other cut-off valves. If there are, they're in the open position because I was the last one to run the generator and I haven't shut anything off.
* Opened and removed the air filter cover and cranked through a few cycles (should cover the "intake" being clogged.
* I did find that the "oil drain" tube mentioned by Jim had completed disintegrated. This drain is now open, and draining into the engine compartment. Since it's not run much, there's not too much oil and none that's fresh. I'll have to replace the tube. My guess is the last mechanic replaced it with something not to code.

Now one more question:

* I'm new to decoding the Onan and thought that the LED under the LOCAL Engine switch would blink out codes if there was an issue. Since it's not starting at all is this an issue? I assumed it would report based on failure to start also. When i press the rocker switch "down", the light goes on, but stays on. No blinking.

If I decide to replace the "LPG Oil Drain Hose" myself, where can I find parts? I got the following from the parts manual, but I can't seem to find anything other than air filters, disposables and manuals on the Cummins ONAN Store: https://www.cumminsonanstore.com/store/search.asp

11 503?1952?06 2 Clamp, Hose - needs replacing
12 503?2171?01 1 Hose, Drain - needs replacing
13 504?0203 1 Valve, Fuel Shutoff - presumably OK

Thanks again for your help and your patience.

David

LP liquid systems vaporize the propane just after the fuel solenoid at the generator. As propane vaporizes, a small amount of heavy oil drops out and could clog the solenoid or the vaporizer. Most manufacturers install a small piece of pipe hanging down just past the fuel solenoid and it has a small pipe cap on it to drain the liquid. Try this first -- is cheap. Beware, the stuff stinks.

JimL

Had the same problem. My air intake tube that sticks out below the camper was completely clogged by mud-daubers. (a kind of wasp). Happened twice. Finally solved by covering with a screen.

i always keep handy some spray engin starter. give intake a shot and try to start. if you get it to fire a bit then u know you have a fuel issue.
but you could still have a spark issue also.

Trace ypour prpane line back to the tank....mine has a seperate vale for the gen.

Bill

ddisp1 wrote:
My suspicion is that the LP Liquid to Gas Converter is clogged up, as the generator (and motor home) were stored without prep for several years.

So you have spark but no smell of propane? I'd be looking for a valve somewhere - it doesn't really take much to 'convert' propane from liquid to gas as long as it is warmer than -44 F outside. :)

http://www.cumminsonan.com/www/pdf/manuals/983-0501D.pdf
This will get you started.