I have a JD 14 SB mower that I bought 8 or 9 years ago. It mowed one lawn for 6 or so years and hasn't been run at all for the last 3 years (moved to a bigger yard and bought a 48" Encore). It has been maintained well, garaged and ran until empty of gas the last time I used it (2001). I want to let my dad use it but it is hard to start and I have to keep it in choke mode for it to keep running. Of course it doesn't run very well so rich. When I pull the throttle back for normal operation it speeds up (maybe too fast) and dies. If I'm quick I can put it back into the choke range and it will sometimes keep running. I ran a whole tank of fresh gas through it but the same problem persists. Any ideas? Thanks!