Running Rough when hot.

[toolman716]

I have an MF 202 Industrial and when it is warm out, about 75-80°, and I'm running under load, it seems to be losing power and the tractor runs rough. I just tuned it up with new points, rotor, cap, wires, and plugs, but I was wondering could this be a carb problem or the coil? It seems to run OK after it has cooled off again.
Mike

 

[Dave_Id]

Normally when a coil goes bad, it will no longer spark. My guess your coil is going bad.

 

[Anonymous-0]

Normaly you feel the coil , and if it's to hot to touch then it's failing.

 

[Anonymous-0]

if your problem started after the tune up try replacing the condensor with the old one sometimes you can get a bad one also i have seen one act like it was runing lean on fuel under load the mechanic changed a new set of points to another brand solving the problem doesnt sound reasonable but it worked

 

[Phil T]

I had the same problem with my 135 and as soon as I replaced the coil it went away. It would start misfiring and acted like it was running out of gas, but as soon as it cooled off it would run fine.

 

[toolman716]

Changed the coil, voltage regulator, points, and condenser. No real change until I adjusted the carb. I have a Continental Z134. I made a couple of adjustments turning out the Main Fuel mixture screw. The backfiring has stopped and it seems to be running a little better, but it still is lacking power. Any ideas???