Onan Propane Generator Won't Start

The regulator diaphram has to see engine vacuum to admit gas into the engine, and at cranking speeds it only takes a. Use a small stick or piece of wire to make sure the vent hose is not plugged up.

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You could also pull a spark plug wire and see if you have fire, but in many installations, the spark plugs are difficult to access.

Onan propane generator won't start. They determined that the batteries were shot, even though they would show “good” on the camper monitor. Bugs love the smell of propane, and will crawl up in there and plug it up. When it is warm, try shutting off the propane tank and see if it will attempt to start.

I tuned it up 15 to 20 hours ago in early spring ie., plugs,oil change and air filter. If it tries to start, you have a fuel issue. Onan propane generator won't start.

On an car engine i'd check the ignition system. Several days later, it might run for a few hours and then it would shut off by itself. There will be a small hose hanging down from the set underneath, at the center back.

A restriction of the regulator vent hose on the generator. In the middle of a 7,300 mile circuit of north america in 2011, we discovered that the onan microquiet 3600lp generator in our 2006 itasca navion wouldn't start. They found no oil in the lines at the regulator outlet and that they were getting a spark.

For proper functioning of the onan generator, the equipment demands a fair amount of airflow. My onan lp generator cranks, but won't start. Onan marquis 6500 propane generator.

Is it the coil, regulator? We had quite a bit of trouble with it last year, involving several rounds of repairs. Carefully check the tube that connects the propane regulator to the engine throttle body (the carburetor on a gas engine).

It seems as if there is no fire when it cranks. Online research eventually revealed a common cause: This happened once before and we were told the transfer switch failed to kick in and that the problem had corrected.

To prevent this from happening, run the generator dry, or you make it a practice to add fuel stabilizer. Lp pressure was 11” wc for 20 min. If it will run, it will probably be for a few seconds.

At 850 hours on the clock, my onan marquis 6500 lp generator cranks but won’t start. If it looks contaminated, it is most likely that the oil quality is the reason behind the onan generator won’t start. Turn on propane with the nozzle of the torch in the air cleaner.

Okthe first thing i want you to check the regulator vent hose. I started having problems last fall where the generator would run for a few hours and then would not restart after i shut it down. If not, an ignition issue.

Take gunny's advice and get a manual and adjust the mixture according to the procedure. Now it will not start at all. We had not run it in many months (we are infrequent generator users).

Has anyone had trouble with a propane onan generator. By the time we put the coach into storage last fall, we felt the generator problems were finally behind us because it was running like an absolute champ. Onan went to electronic ignition at some time and rv people have told me over the years how lucky i am to still have points.

If the fuel in the cylinder or tank is not “pure” propane, the engine will usually do one of several things:

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