Wiseguy71006
New member
Ive got a 212 and have a brand new Mikuni 24 flat slide and a new Mikuni square body pump. When the engine is running, it pumps fuel past the needle and starts pumping it out of the float bowl overflow hose. I have installed a 2.0 needle and seat in place of the 2.5 that was in the carb. I’ve heard that if you run a pump you need the smaller needle...idk. It still leaks out the overflow tube. I can gravity feed it and bypass the pump and it doesn’t leak a drop of fuel. I even though my pump was putting too much pressure on the neeedle so I bough another new pump, round design this time and it leaks with that one as well. Have any of you run into this, and what did you do to fix this problem? All of my stuff is brand new, not a used piece on the entire engine!