18 hp B&S starting problems
My 18 hp twin B&S garden tractor starts easily when cold and runs great, but will not start after it has reached operating temp. If I remove the plugs and give them a quick clean with a bass brush it will start and run smooth. The plugs do not appear to be fouled when I clean them. If I leave it running it works fine with no loss of power until it runs out of fuel, and when it cools it fires right up. Any light shed on this problem is appreciated.