Craftsman riding mower, Kohler cv 165 1995, model # 917.271131

Third death, each on a hill, and there is plenty of gas in the tank. Ran fine for about 3 minutes on flat ground, started down a hill and sputered. Started back only for a few second at a time to limp back into garage.

Last week would not start on flat ground after death. Spent a few days "resting" and started.

Any advice? Oil, oil filter, air filter,plug, all new.

 

Rebuild or replace the carburetor.