Re: EF1000is stalling

I did check and blow out all the jets. there is one jet on the top of the carb that is open to dirty air what is that one for it was clean. All three loads were on all the time the fan is a small one on a wood stove. I tried it on my block heater which is 400 watts and it did it to. Is there any place that could have a vacuum leak in the head?
Thanks, Bruce