iiiat, I have been down that road with this engine and it isn't a pleasant experience. THe 2300 will run well without the pump if you change the carb. I still have a pump in the drawer but will never put it back on the 2300, don't need it and it make adjusting a nighmare but as you stated it can be done but not with the original carb. I spent a year adjusting needles and pumps because on my inability to follow what I knew was wrong.