Originally Posted by hammick
I bought a lightly used EF2400IS (it is the IS model not the latest ISHC model) on Craigslist today. According to the seller it only has about five hours on it. It looks new and fires right up. However, it does surge and takes a while to ramp up when it is put under load. I need to run seafoam through it and/or spray the jets with Carb cleaner. He said it has sat in his garage for about four years with no fuel in it.
The unit will go into protect mode when I turn on the 13.5 AC unit on my Gray Wolf 19rr. The interesting thing is if I have the fridge running on electric (which ramps up the rpms on the Yamaha) and then turn on the AC unit, the AC will start and then run just fine. I believe this is related to the gummed up carb or jets but thought I would ask here.
The microwave alone seems to tax the generator for about ten seconds. I don't have any experience with these Yamaha generators but I suspect it should ramp up immediately without surging or hesitation.
Thank for any suggestions.
There is nothing wrong with your Yamaha. What you are experiencing is very normal. If he gave you the manual, you will see that it is required to have the generator in "Normal" and not "Economy" when using inductive loads like the air conditioner or microwave.
Turning on a 120VAC light bulb or anything AC will ramp up the generator out of economy and prevent the load from pulling the generator into alarm before it can produce enough juice to spin up the air conditioner compressor.
Installing a delay relay in the fan circuit will cut the amps required during start up by a large factor and may allow the generator to get up to speed before the fan kicks in.
air conditioner for generator mod
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