Have to pull 600gator to start it

Check engine light on , code's stored ?

If a brake is binding try driving in a straight line on tarmac, lightly grip the steering wheel and brake firmly. The gator will 'pull' toward the binding brake. So pulling left is a left side brake and pulling to the right is a right side brake.
Another test is to chock a wheel and safely jack up each wheel enough to clear the ground and turn each wheel by hand. A binding wheel will feel tighter or won't turn at all.

check starter bolts pull plug and do a compression test clunk in engine never good possible spun rod bearing

would try and bring the temp down by lower degree thermostat hi-volume water pump bigger radiator maybe even double check timing sounds like you might be boiling fuel and hydro locking it

The voltage regulator/rectifier will not affect the starting. Pull a plug wire off, turn the key to try to start to check for spark. If it has no spark, replace the coil pack or make sure it hasn't rusted between the flywheel and the coil contact. You can get more detailed info for small engine spark and coils on you tube.

sounds to me like you have a bad motor, yes both wheels should turn

Try clearing the vent holes in the gas cap.

Gary

remove the center cap then bend the metal push nut with a needle nose pliers and pull it off then pull the wheels off leaving the axle in place

Try removing the idle speed motor on side of throttle body, and spray it clean, as well as the port it came out of, with throttle body spray cleaner. Don't pull and extend shaft of idle motor, just leave it in position it's in, and make sure you don't lose small "O" ring on idle motor. Re-install and try it. If it cures it for a while, then starts to do it again, replace the idle speed motor.

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