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Hello, I have a craftman 46 inch pro series riding lawn mower. It wouldn’t start even after charging battery. Changed battery, cut 1 acre just fine, midway through the next cut the blades would disengage, engine would rev a little faster and the steering would get tough. Turned mower off and wouldn’t start back. Put on charge for about 30 mins, mower started back up, ran for about 10 mins and I repeated the same process 2 or 3 more times until I finished cutting the yard. Any thoughts?

Sounds like the battery is not getting charged. Check across battery terminals with it running at cutting speeds you should be getting 13.5 volts if not then the charging circuitry is to blame..