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Old 05-14-2011, 02:34 PM   #1
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Non Starting 4K Onan Gen

I have the above listed generator which is in a vehicle that is 27 years old. I can only assume it is original but the time meter only shows 160 hours. That is a good thing. Issue is that when I try to start it, it doesn't even turn over. Inside the box where the generator start/stop switch is there is what appears to be a relay of some type. Also very obvious now I am a true green horn at RV'ing. When I try to start the gen I can hear and feel this relay(?) just click. Is it possible that this item is bad or is the clicking just transferring to this relay ? Also is it actually a relay ? It is black and has probably 6 - 10 wires connected to it. Are there methods to check this out to determine that it is or isn't bad? If it is questionable I can get a picture of it and post it.

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Old 05-15-2011, 07:46 AM   #2
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A common problem with the 4K is that, when shut down,, it may stop on the beginning of the compression stroke. If there are contributing factors, such as low battery or a "carboned" cylinder, it may not turn over. This is because there is more resistance than the starter motor can overcome. With power removed from the generator (in other words; don't press the start switch), reach in on the left side, behind the filter assy, where you can feel a blower assembly. Turn this with your hand - it will be tight - remove your hand and try to turn it over again, This usually works. Got this from the Onan repair people here.
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