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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...

Needle seat is next. No external leaks. No hydro lock

Done

The replacement carb I used is a 16-853-19S from Amazon. I still have the original and can rebuild it. Just need the kit.

Hydro lock was definitely a problem. Changed oil, a couple of times. I have replaced the carb, hoses, and fuel pump. Runs great when first started . However after it warms up it starts to sputter, backfire and keeps dying. Ideas please! Could I be losing the 'coils'? I have replaced the plugs as...

Thanks I'll check that!!

Hi all, I've A Cub Cadet 46" cut with a KT725-3055. I just replaced the carb with no problem. I have started it a couple of times. Today I went to start it to try to mow. The engine would not turn over. I grabbed a wrench and pulled the motor through a couple of times. Tried to start it again...