Thanks for the input! Iíll throw the air box back on, I've just avoided it because of the work to put it on but Itís inevitable regardless. Iíll check out the compression. I honestly didnít check it myself, but it was checked multiple times before purchase. Also the choke is working, on the previous engine the carbs functioned perfectly so Iím guessing itís due to the air box. I do have a fuel filter on as well, and it does appear to be clean. Iíll keep you guys posted. This was a surprisingly easy job to do so something had to cause troubles!