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Quickuc · 09-19-2019, 11:20 AM

Back home now temps are 85 today. Started gen. To duplicate it stalling after 20 min. It ran 40 and never quit, I was convinced it would stop and I could check fuel delivery, never happened. Now I saw a video saying drain some oil out of the gen. And that could fix it! Oil level is alittle high, what do you think? Like I said a week ago we were in 100 degree heat.

ThePowells · 09-19-2019, 07:41 PM

That's part of the issue is getting duplication. Mine shut down with ambient temps just above 100, so was it
1) Possible foaming in the oil created by the temps,
2) Fuel pump failure due to the temps,
3) or simply ambient temp shut down due to airflow?

Unless you immediately remove the oil, have a fuel pump ready to change, or open the compartment and run it, so are shooting spitwads at a moving target and often won't know if you hit anything until the next opportunity to duplicate the issue.

Bahamaniac · 09-19-2019, 07:58 PM

I would definitely remove a bit of oil.

GMoore · 09-19-2019, 08:01 PM

Fuel nozzle tripping off during fill, never happened before, from your other post. Could be tank vent problem.

Quickuc · 09-20-2019, 09:20 AM

Tank vent meaning main tank? I know we filled at least 5 times during trip and I believe vent at gas cap seemed ok.

Quickuc · 09-20-2019, 09:24 AM

I did notice here at home during test run with cover off gen and cargo door open it does generate some pretty good heat, can't imagine what it felt like in that 100 degree day!! Wow

sbleiweiss · 09-20-2019, 09:24 AM

On our Onan 5500 it needs to be full full of oil. I would not drain any out on mine. I would rather over fill.

carl.swoyer · 09-20-2019, 09:37 AM

Quote:

Originally Posted by Quickuc

Back home now temps are 85 today. Started gen. To duplicate it stalling after 20 min. It ran 40 and never quit, I was convinced it would stop and I could check fuel delivery, never happened. Now I saw a video saying drain some oil out of the gen. And that could fix it! Oil level is alittle high, what do you think? Like I said a week ago we were in 100 degree heat.

Are you using 15w40?

Gary RVRoamer · 09-20-2019, 10:29 AM

If your oil is a bit high, t certainly doesn't hurt to remove a little and elimintae that possible cause. However, I would not have great confidence that it is going to be the fix.

The "too much oil" problem is one of those internet tales that gets re-told every time somebody has a generator stall problem. There were only a few genset models that actually had that issue and I believe that later spec levels of those models corrected the problem, but the "too much oil" diagnosis lives on.

I don't recall that you ever said what year/make/model of genset you have, or even what rv make & model, but I'm not going to search the site to find it. Please give us the facts.

norcal01 · 09-20-2019, 11:38 AM

Here's my 2 pennies.
I went through the same symptoms with my onan 5500 gold marquis. Always problems at hi temps.
Tried draining some oil, no help.
During troubleshooting I determined that the carb was dry at each shutdown.
Pushing stop/prime no fuel flow after shutdown, pump went click,click click.
Next morning when cool stop/prime filled carb, pump went. CLICK,CLIck,CLICK sound about twice as loud.
Fuel pump hi temp failure?
Ordered new pump and filter. Ran for 2 hours at 92 degrees after install.
I think I fixed it. Fingers crossed.