9n Tractor will not start after running

[Aubrey]

Good afternoon, have a 9n tractor, it starts great, (when cold), and runs great. After running for a couple of hours if I shut it off and try to start it again it cranks but will not start. I have to wait for it to cool off. Any ideas on what might be happening? Thanks

 

[Tippybw]

Good afternoon, have a 9n tractor, it starts great, (when cold), and runs great. After running for a couple of hours if I shut it off and try to start it again it cranks but will not start. I have to wait for it to cool off. Any ideas on what might be happening? Thanks

Is it getting a good spark when hot, if not may be the coil breaking down. If spark is okay, you may be getting a vapor lock. Try replacing metal fuel line with rubber.