Question about Yamaha EF4500iSE Generator 4500 Watt Inverter Series Trailer Camper RV

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Yamaha EF4500Ise Gennerator won't produce power.

I bought a used Yamaha ef4500ise genny for my camper with 80 hrs on it. I put 15 hrs on it, and it worked fine. Now all of a sudden when I turn it on, it's continues to run(good idle) but only produces power for 30 seconds or so, then the overload light comes on. This is with no load on it. I've cleaned the air filters and changed the spark plug and nothing. Someone please give me some good news(easy fix). It'll **** that i just gave $1500 for this genny for 15 hrs of use. Thank you in advance.

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  • jerosan77 Sep 20, 2012

    It was a bent pin. It had a recall for the carburator, when it was replaced, the dealer bent some of the pins that connected to the idle. Therefore it was running high idle(pushing 300amps) and overloaded immediately. The pins were replaced and everything works better than it did originally. I'm thinking the guy that sold it to me thought it was toast and tryed to screw me, little did he know, it was covered by warranty still and didn't cost me a penny. Yamaha is good to go.

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Doe's it have a thermal couple on it? If so it could be bad and when it heats up it is killing your power.

Posted on Sep 18, 2012

  • jerosan77 Sep 18, 2012

    The AC power goes out immediately within 30 seconds or so

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