I have an 066 magnum that ran great last fall, now I can't get it started. The saw has a big bore kit and ported muffler. Compression is 150 ish psi, I have good spark, new spark plug, checked the flywheel key way and it is good. Cleaned the carburetor and it just kept flooding so I tried a new carburetor and new gas. The saw just floods out and will not start. Any help is greatly appreciated I really need to get my saw running, I have a ton of wood to get cut up.