I recently purchased a 2n. I was told it would run for a few minutes and then quit running. Having other tractors this one was put in the corner and left.thats where it sat for 5 years until I purchased it. I need to use it this spring as a landscaping tool as I have a scoop bucket and scraper box. Anyway I cleaned out the old gas, replaced the radiator (rotted), did a complete tune up, replacing the 6v coil with a 12v (thinking that may be the trouble) and it will run great for a few minutes. It starts to sputter and wants the choke back on and then will not stay running. This is the third n series tractor I've owned and have been lucky with a few old timers that knew these tractors. Now I'm an old timer and they have gone. Any suggestions would be appreciated.