KT725-3055 Smoking Badly

So, are you saying you changed the oil again? Have you done anything to check the carb needle/seat? That new carb could be leaking and continuing to cause problems.
 
Update, new fuel lines, new fuel pump, carb clean including all needle seats, strong blue spark both plugs, sheet metal cover removed cleaned replaced.
Current symptoms: starts, runs smooth, idles great. Trial mowing run #1, starts easy, ran, cut well. After about 30 min, Started to run rough, acting like starving for fuel and/or electrical cutting out. Put it back in barn, let it cool off 1.5 hours. Trial mowing run #2, same as the first, except started to cut out in 15-20 min. Parked for the day. Now only a problem after the engine warms up. Any and all ideas welcome.
Thanks
--Mike
 
Update, new fuel lines
From where to where exactly?
new fuel pump
OEM or did you save money again on Amazon? Any new pump will demand testing.
carb clean including all needle seats
Clean where, on the outside or was every jet pulled, emulsion tube cleaned and float height set proper?

Sometimes people say they cleaned the carb. Only to find out in pictures later they sprayed the outside with brake cleaner.

Was the needle/seat tested? I would say no because for 2 pages now, none of us have read about it. You are ignoring what we type out here for you, for free, on our own dime. Maybe you are just missing it??
sheet metal cover removed cleaned replaced.
A clean cover does ZERO for clean engine block cooling fins.
After about 30 min, Started to run rough, acting like starving for fuel and/or electrical cutting out. Put it back in barn, let it cool off 1.5 hours. Trial mowing run #2, same as the first, except started to cut out in 15-20 min. Parked for the day. Now only a problem after the engine warms up. Any and all ideas welcome.
THIS points to trash in the fuel tank and or water.

Could be a failing ignition coil. Test with an open gap spark tester at low, mid and high revs.
 
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