310777 0112-E1 16.5 HP OHV Single Cylinder side draft carb, gravity fed. Rebuilt the carb. Mower only starts when I remove the air filter from the mower. It's a little reluctant to start, but it will run. The running condition described as reluctant and not as fast as one would think the engine should. A tug on the governor and it runs faster. I let the engine run full speed under no load. - I filled the gast tank with about an inch of gas in the bottom - man-oh-man does it suck down the gas. As the level in the carb bowl gets low - right before it runs out of gas - the engine speeds up and runs like it should, then of course, due to no gas, it dies. I have the deck removed, the mower will drive around, no problems. The engine will turn over by hand with almost no resistance, it feels like compression is being shoved back out the intake. I pulled the OHV cover and all moves like it should. Anybody have any experience with this issue. ?