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Open Roads Forum  >  Class C Motorhomes  >  Class C

 > Gen-set Troubles

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jk31668

so. Fla.

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Posted: 09/17/21 06:27pm Link  |  Quote  |  Print  |  Notify Moderator

do you run the genny under load once a month for at least 30 mins regardless of time of year? if no, the carb may be fouled up and a new one is needed. they gum up very easily. stabil gas treatment make no difference.

whemme

Spencer, IA

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Posted: 09/17/21 07:55pm Link  |  Quote  |  Print  |  Notify Moderator

VA-Apraisr wrote:

I had this exact same thing happen and all it was , was the ground wire was corroded. Simply scraping it clean and reattached it and generator ran like normal. Just a thought…….
If the ground connection from the generator to the RV chassis frame was high resistance due to corrosion or rust, your generator would not start or would at least turn over very slowly. Once the generator is running, the chassis ground connection is no longer required for the generator to keep running once started.


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klutchdust

Orange, California

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Posted: 09/19/21 09:14am Link  |  Quote  |  Print  |  Notify Moderator

Repair this one, much less than a new one. Find a mobile RV mechanic near you. It sounds fuel related, maybe pump, filter or fuel lines. Sta Bill IMHO is worthless. I added that to all fuel for all my small engines and they still gum up after a month.

1320Fastback

Vista, Ca

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Posted: 09/19/21 08:26pm Link  |  Quote  |  Print  |  Notify Moderator

If your Onan has the plastic altitude cap on it pry it off with a screwdriver behind it and turn the needle out 1/4 to 1/2 a turn. These things run lean to meet EPA standards and I believe they are not optimal at factory settings.


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jjrbus

FT Myers FL

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Posted: 09/21/21 05:00am Link  |  Quote  |  Print  |  Notify Moderator

Google carburetor gummed up with ethanol. Very likely your problem is gummed up carburetor fouled and something else. Cummins is the best place to take it but expensive.

klutchdust

Orange, California

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Posted: 09/21/21 09:26am Link  |  Quote  |  Print  |  Notify Moderator

jjrbus wrote:

Google carburetor gummed up with ethanol. Very likely your problem is gummed up carburetor fouled and something else. Cummins is the best place to take it but expensive.

It's a simple gasoline engine, what does Cummins need to do that a mobile RV mechanic could not. The carb can be removed and cleaned, replacement parts are available. Not much more than a large mower motor in my opinion. BTW, mine had similar symptoms and a fuel pump cured it.
Recently it would not start at all, found a wire chaffed and broke. Check the wiring loom. Frequent start ups deters rodents also. I have a solar powered light that illuminates the area in front, then brightens if it detects movement. Rats don't like lights.

* This post was edited 09/22/21 08:55am by klutchdust *

Grit dog

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Posted: 09/21/21 10:24am Link  |  Quote  |  Print  |  Notify Moderator

Running for 10min and then not again for an hour is not an expected symptom of a gummed up carb.
More like a fuel pump that quits pumping once it gets heat soaked. Or similar condition with the spark coil/stator/ control board.
Until you know whether it’s missing fuel or spark when it dies, it’s just speculation.
Run it til it dies, then pull gas line off carb immediately and try priming. If no noise or no gas then likely fuel pump. Can also see if the float bowl is low/empty right after it dies.
If you got fuel then do the same and check for spark.
Easiest to plug-in a spare spark plug and check ( ground plug to engine)
You’ll know a lot more about what is wrong for $0 and less than an hour of your time.
The you can diagnose why it’s not gettting spark or fuel.


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Bordercollie

Garden Grove, CA, USA

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Posted: 09/21/21 10:20pm Link  |  Quote  |  Print  |  Notify Moderator

You can try some of the DYI fixes. If they don't work, ask around, get recommendations, and find a nearby honest pro generator repair shop. Diagnosis and repair of your generator, may cost you some $800, maybe less if it's simple. Lot's cheaper and more convenient than buying and using a portable generator plus it will make your rig easier and worth more when you sell it.

When you get it running again, run generator with roof AC frequently and maintain house batteries and connections to help it start easily.

hohenwald48

Nashville, TN

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Posted: 09/25/21 04:14pm Link  |  Quote  |  Print  |  Notify Moderator

Is it flashing any trouble codes? Fuel filters and fuel pumps go bad often and are cheap to replace.


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Grit dog

Black Diamond, WA

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Posted: 09/25/21 07:15pm Link  |  Quote  |  Print  |  Notify Moderator

Nother 1 and done posted it appears…

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