I can start it run WOT for about a min. then it boggs down and I can pull it back to neutral then run it up to about 2500 rpm and it runs fine but if I go above that it starts to bogg out?? if I pump the bulb it helps but the ball it hard and you have to pump it really fast or it doesn't help.also when it was acting up I was just running it blow the 2500 rpm mark which it runs fine but I punched it and ran WOT and it ran fine until I slowed down again then it wouldn't run above 2500rpm again??is it fule pumps? this motor has two?I changed power packs and carbs were rebuilt last year.any Seggestions?thanksDerek