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 > Onan 5500 flooding

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Kober

Arizona

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Posted: 11/20/18 10:02pm Link  |  Quote  |  Print  |  Notify Moderator

So my Onan 5500 generator won't start. Removed airfilter and watched fuel spitting out at me from the little hole next to the air intake. Drained the bowl, generator started, ran for 30 seconds, fuel spit back out at me and generator stopped running.

Thinking stuck float in bowl?

Maybe try and clean without removing the carburetor?

Any advice is appreciated.


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eHoefler

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Posted: 11/21/18 05:05am Link  |  Quote  |  Print  |  Notify Moderator

Stuck float or debris blocking float. Disassemble and clean


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77rollalong

Brighton Ontario

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Posted: 11/21/18 05:41am Link  |  Quote  |  Print  |  Notify Moderator

disassemble and clean the float bowl and check the condition of the end of the needle the see if it is rubber tipped or not, sometimes they swell up (rubber) and may need a new needle and seat.

Kober

Arizona

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Posted: 11/21/18 08:06am Link  |  Quote  |  Print  |  Notify Moderator

Can the bowl be removed without removing the entire carburetor?

RLS7201

Beautyful Downtown Gladstone, MO

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Posted: 11/21/18 09:51am Link  |  Quote  |  Print  |  Notify Moderator

Kober wrote:

Can the bowl be removed without removing the entire carburetor?


Yes............Remove the fastener in the center of the bowl.
Also check that plastic float for cracks. Shake it to see if there is fuel inside.

Richard


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Kober

Arizona

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Posted: 11/21/18 11:30am Link  |  Quote  |  Print  |  Notify Moderator

RLS7201 wrote:

Kober wrote:

Can the bowl be removed without removing the entire carburetor?


Yes............Remove the fastener in the center of the bowl.
Also check that plastic float for cracks. Shake it to see if there is fuel inside.

Richard


Good call. My float is full of fuel but I can not find a crack or hole. Now what?

msmith1.wa

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Posted: 11/21/18 11:25pm Link  |  Quote  |  Print  |  Notify Moderator

Most likely you will have to replace the whole carb, because the pin that holds the float is pressed in and not easily removed.


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Kober

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Posted: 11/22/18 08:04am Link  |  Quote  |  Print  |  Notify Moderator

msmith1.wa wrote:

Most likely you will have to replace the whole carb, because the pin that holds the float is pressed in and not easily removed.


Actually I was able to get it out without too much trouble.

RLS7201

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Posted: 11/22/18 09:31am Link  |  Quote  |  Print  |  Notify Moderator

Kober wrote:

RLS7201 wrote:

Kober wrote:

Can the bowl be removed without removing the entire carburetor?


Yes............Remove the fastener in the center of the bowl.
Also check that plastic float for cracks. Shake it to see if there is fuel inside.

Richard


Good call. My float is full of fuel but I can not find a crack or hole. Now what?


There are float/needle kits available. Not having the model # makes it impossible to guide you to the exact float but the float in this link may work.

Richard

lamopar

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Posted: 11/22/18 09:39pm Link  |  Quote  |  Print  |  Notify Moderator

So our Onan was doing the same thing. I pulled and cleaned it and fought it for two years. Finally I purchased a carb off Ebay and replaced the factory unit. Started immediately and has worked ever since. I changed to only adding non-ethanol fuel to the generator tank and my fuel station tank. Same thing with my sons Can-Am DS90X and it has worked perfect ever since. The generator carb was replaced two years ago and will start and run great every time I try it now.

That was my route and it worked. I know others have had luck cleaning and replacing parts but this was fast and worked perfect.

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