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