Message from discussion I have a Onan 4000 GenSet problem.
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Sun, 07 Oct 2012 09:45:07 -0700 (PDT)
From: Albert <amla...@hotmail.com>
Subject: I have a Onan 4000 GenSet problem.
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Date: Sun, 07 Oct 2012 10:45:07 -0600
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I have a Onan Microlite™ 4000 Series that I've had a problem with.
When I first bought my 2003 Holiday Rambler I chose not to have it
generator prepped because I got to figuring if I put a generator
onboard I would lose quite a bit of storage space. So I decided to go
another direction when I bought the generator. Which is shown below (
http://www.lasonwebpage.com/Camping_Stuff.html ). As an added feature
of this configuration I can use the generator for auxiliary power
anywhere I can take to pick up by rigging up a battery hookup
receptacle on the pickup.
Every six months I start and run it for about an hour and then put it
back in storage. About a week ago I pulled it out and it wouldn't run.
I was getting a fault that indicated I should check my fuel level in
the tank (in other words out of fuel). I knew I had fuel and the
generator would start but only run about 30 seconds and then I would
get a shutdown fault indicating I wasn't getting any fuel.
So I pulled the fuel line off the carburetor and hit the primer
pre-start on the switch and had plenty of fuel. I change the spark
plug and fuel pump that didn't help. Out of frustration I took it down
to Cummins to have it checked out and they had to put a new carburetor
on it and they told me that the carburetor was varnished up. I brought
back the old carburetor and sure enough it was.
Now, it was explained to me that when I winterized the generator that
I should have run all of the fuel out of the carburetor which
unfortunately I did not so from now on I will disconnect the fuel line
from now on and do just that.
Because I'm using an outboard motor fuel tank it's easy for me to
disconnect the fuel. But if this generator were mounted say in a
motorhome it would probably have to have a fuel tank shut-off valve,
I'm just guessing. The generator itself does not have one.
Anyway, I just thought I would pass this along so maybe someone else
will not make the same mistake I did to the tune of $455 :-(. On the
bright side I did clean the varnish from the old carburetor so I now
have a spare carburetor and fuel pump.