Could be either or neither...If you have good fuel flow, take the carb apart and spray it all well and thouroughly with good (not the eco friendly AlGore approved crap) carb and choke cleaner, stick the straw in all the passages make sure it flows through and none are plugged, check that the needle seat is good, make sure the choke shaft is moving free and easy...then refer to the manual and set all adjustments back to reccomended settings, make sure the carb/manifold gasket is good (do you ever see any icing even in waem weather either by that gasket or anywhere on the carb?) then try and see what you have...(other than the part about using the choke I would think governor spring is your issue) so try the carb stuff first. Does it start normally on cold start up?...or maybe does it start when you are starting to disengage the starter? This may indicate a timing issue...again refer to a manual and use the twist the distributer til it sparks method to get you in the ball park. If that all fails, and ya have checked the manifild like mentioned below and it's still acting funny, then check your governor spring, reset the governor adjustment to manual specs and check your throttle/governor linkeages for binding ir excessive play. Then we need to talk electrical if all else fails...is this new for the tractor to do this, or is the tractor new to you? Is the system still 6 volt or has it been cobbed up and converted to 12v? Is the coil the proper coil? If it's a 6v system and you have a 6v coil you should be ok, or it may be a 6v system with a 12v coil in which case you need an inline resistor or your coil will get hot and cut out. Also I just had an intermitent problem with a condenser on one of our Deeres...I had always thought condensers were either good or bad...NOT! How about the plugs? Checked for fouling or excessive carbon (too rich) or brown (too lean), plug wires? any cracks, or arcing to the chassis? Hope amy of this helps! Pete
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