So heres the story. Bought this motor for $100 and I was told it had sat for 3 years. When I got it home I was going to check for spark and found it had a stripped spark plug hole on the lower cylinder. Did a quick spark check and had spark so with the help of my son did a compression check (had to hold the tester by hand on bottom cylinder) I had 92 and 91# so went ahead and pulled the head and had a helicoil put in. Replaced the head with new gasket and put back together. While I was waiting for the head to get done and my gasket to come I went ahead and replaced the waterpump and cleaned the carb. I replaced the fuel lines with new while I had it apart. Okay, so today I go to fire it up and it wont fire?? I again checked for spark and it would span a 3/8 inch gap with a spark tester. Carb bowl was filing with fuel but the plugs looked dry. I didn't pull the little plates on the carb just soaked it overnight in a can of carb cleaner. Cleaned it all up and sprayed it out with compressed air and the aerosol carb cleaner. Next, thinking something was plugged still on that carb I took a old 15hp carb that I had saved from a old motor that was clean and tried that. No luck. Still no fire in the cylinders BUT I have spark. Did another compression test-91 and 92 again. The plugs are new but seem dry. I have cleaned a lot of them 9.9 and 15 hp carbs and never had to pull them little plugs before but maybe that's whats causing it to not get fuel to the cylinders? Fresh fuel and oil mix in a tank I had just mixed and used so not a old fuel problem. I would think it would get some fuel to fire even if something was still plugged. Would bad leaf valves cause this? Sorry for this being so long but tried to explain all I have done so far. Thanks for any help, Jim