Question about Yamaha 2500 Watt Industrial Inverter Generator YG2800i

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I have a Yamaha ef2800i that will fire on the first pull, runs up to operating rpm then dies. It won't restart for about a minute. I will go through the fuel system but first I want to check the oil level kill. Where is it located? The oil light does not come on before it dies but as soon as the AC light comes on it shuts down. Is this a clue to a problem?

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  • super_dave94 Oct 11, 2010

    Classic fuel problem it was. I was able to run the unit on starter fluid confirming it was not the oil level kill, cleaned carb. It now runs great.... Until I put the throttle control motor back on the carb. I indexed the controller to wot with the engine off but it now runs wide open unde a load when not in sw mode. Any ideas?


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This is a classic fuel flow problem. The oil level switch is usually screwed into the crankcase fairly low with a single wire attached. I would check the float valve into the carb bowl. Also check fuel filter. Some of these are on the end of the fuel finder hose in the tank. Purrge the fuel system and carb. ALSO verify the fuel supply valves is being fully opened as some are hard to get to.

Posted on Oct 07, 2010

  • Fred Yearian Oct 11, 2010

    Getting the control motor set properly is essential. Also check wiring... backwards control power would do this. Often there are springs involved with the govenor systems and those can be critical. The indexing of that control motor is going to be critical and IF by chance it were off 180 degrees that would cause the runaway. Try to find a manual or call the manufacturer for alignment procedure or the other thing is to keep trying different indexing till you find the right one. Indexing can be tough to keep track of as often there are springs that go "sproing" and disturb the setting before you can document it.


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