Got a pump from a member here that was rebuilt. While I was waiting I got a used pump that leaks like crazy but the tractor fires up and runs good. With the new pump it will not start without a whiff of ether. Its 96 here today so I know its not too cold. I get puffs of white smoke but it just wont start. Switch back to old pump and it fires up fine. But the tractor runs better with the rebuilt pump after I get it started. Timing is set to 1/2 degrees advance on both pumps. Fuel flow at the pump is good. Should I put more timing on the rebuilt pump or is there something internal I should be looking at? At this point I could swap a pump in my sleep but Im kind of tired of doing that.