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Topic: 2002 Lazy Daze Onan 4000 problem (Read 316 times) previous topic - next topic
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2002 Lazy Daze Onan 4000 problem
My 2002 LD 24' has an Onan 4000 generator does not seem to be getting gas at the carburetor. Gas tank is full.  (Also: I get an error code 41 which is rotor issue??)  It has worked fine for us for 6 years now, although we use very seldom.  Is there a fuse for the fuel pump? I do not see anything in the manual. In doing research online they say it's probably a fuel pump, or maybe a broken pickup tube in the gas tank. I've looked at online videos on how to replace a fuel pump and it seems a bit complicated but doable. Any suggestions? They would be much appreciated.
Re: 2002 Lazy Daze Onan 4000 problem
Reply #2 –
Quote from: rich  - 
Fuel pump can be replaced:

The Lazy Daze Companion: Generator - Replacing Onan 4000 Microquiet Fuel...


Also, search for the cracked fuel hose issue.   A known problem for coaches of that age:

Fuel tank generator hose replacement | Flickr

Rich

OK I will check further.  Great start.  I also did an error code check and it is 41- which is a bad rotor apparently,  but maybe another issue entirely?
 
Re: 2002 Lazy Daze Onan 4000 problem
Reply #3 –
Leaking rubber fuel lines on LDs of your vintage is extremely common. I replaced several of them over the years.
There are two sections: A short section at the generator and another on top of the fuel tank. Many times, the top hose requires partially dropping or removing the tank. If the tank requires dropping, replace the chassis fuel pump; they have a limited lifespan.
The fuel pump can be tested by connecting a short piece of good fuel line to the generator's fuel inlet and dropping the other end of the hose in a 1-gallon can half full of gas. 
If the carburetor stays dry with the fuel pump activated, assume the pump is bad. If the generator starts, the fuel line is probably rotted.

If you get the generator to start and run smoothly, see if the Code 41 remains. With infrequent generator operation, the commutator rings can be build up corrosion that is normally cleaned by monthly test runs. Try running the generator for twenty minutes or so to see if this helps.
Also, check the circuit breaker located under the generator cover to see if it has tripped.
If none of this helps, you may need to see the services of a professional generator shop, which chould have the specialized test equipment to determine the problem.
This isn't a cheap procedure as the generator normally needs to be removed for closer examination.

As always, a monthly maintenance run is the absolute best way to keep a generator healthy, preferably under a heavy load.

Larry
Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze