Thank you for replying! I'm pretty sure I have the T correct, I did it like the book showed (big end to fuel pump then the Y (on the big end) to carb & little side back to tank). My float valve needle was in upside down, there causing a the fuel to run out of carb, fixed that no more fuel leaks but it still wont fire! I've got spark, got compression (125psi) I can see fuel going through the lines to carb. I've even poured a little gas (straight) into the cylinder & still nothing (I know that's bad but I was just trying anything even used a little starting fluid & nothing......would the piston being in backwards cause any of this? Thank you for your input, man I need I'm getting so stressed over this thing. Also could a clogged exhaust do this? When I bought this it had been sitting in a barn for 30 + years. I took spark arrestor out & cleaned it.....