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Old 03-31-2007, 03:58 PM   #1
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My Onan 4.0 in my WW FS2300 won't start, it turns over but it won't fire. Do any of you have any trouble shooting tips I can try? I have cleaned the plug, checked the air filter, found a colapsed gas line near the gas tank and fixed it but it still won't start. I am going to my hunting lease next weekend and I need the gen.
Any ideas would be appreciated.

TB
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Old 03-31-2007, 03:58 PM   #2
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My Onan 4.0 in my WW FS2300 won't start, it turns over but it won't fire. Do any of you have any trouble shooting tips I can try? I have cleaned the plug, checked the air filter, found a colapsed gas line near the gas tank and fixed it but it still won't start. I am going to my hunting lease next weekend and I need the gen.
Any ideas would be appreciated.

TB
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Old 03-31-2007, 04:09 PM   #3
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TB,

Try to determine if it's getting spark to the plug and if it's getting gas into the cylinder. If you have a spark tester install it between the plug and plug wire to test.

After cranking it, look at the plug to see if it gets a little wet with gas. If so, that's a good indication of no spark.
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Old 03-31-2007, 04:56 PM   #4
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I don't know how to check to see if it is getting gas in the cylinder. I know it is getting spark because it knocked the fire out of me when I was testing it.

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Old 03-31-2007, 05:13 PM   #5
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If it gets fuel and spark it ought to start.

They have a sensor on them that prevents starting if the oil is low, I'm sure you've checked the oil level but you might want to check the sensor to see if it's faulty.

Even though you cleaned the plug, you might want to stick a new one in to eliminate it entirely as a cause of the problem.

Another hunch, is the fuel level in the tank below the pickup tube level? If not half to full, you might pour in a gallon or two to eliminate that too.
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Old 03-31-2007, 07:48 PM   #6
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TB, if its been sitting for awhile make sure you hold the switch in the up position (prime) to allow the pump to run for a bit, then crank, then hold the switch again for a bit. Mine takes forever to get fuel pumped up to the generator. Also, you'd better check the pump to make sure its running. It should be back by the tank. I can hear mine run when I hold the switch in the prime position.
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Old 03-31-2007, 08:52 PM   #7
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I'll bet it is the fuel pump....
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Old 04-25-2007, 08:10 AM   #8
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TB..... did you fix it yet?
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Old 04-25-2007, 09:50 AM   #9
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It was the Onan fuel pump. I took it to Camping World and got it replaced free under warrenty. The CW service tech, like me, couldn't understand why WW would make such a long, unnecessary, run with the fuel line. He thinks the long run may have overworked the small pump.
The gas line comes out of the door side of the tank, goes over to the door side main beam, runs almost to the front of the TH, crosses back over to the gen. side of the TH then back 3-4 feet to enter the gen. compartment.
As soon as I can I am going to see if I can shorten the gas line run. I have already looked at it and I think I can take 12-15 feet out of the run.

TB
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