kohler 12 hp k301s problem

Two years ago I bought a bolens 1050 that someone had put a kohler k301s engine in. It ran fine until late last year when it started to run poorly. It sat all winter and now it will start and run only with almost full choke.It idles and speeds up as long as the choke is almost closed.As soon as it is opened slightly it dies. Any advice appreciated. jaybird-oh
 
If that engine has a main jet adjusting screw you need to open that jet. That will enrich the fuel mixture. Open the screw until the engine smokes then slowly close the adjusting screw. Hal
 


Yup. And get some decent fuel system cleaner in the tank. I like Berrymans B12, available at Walmart. I just degunked a Kohler K series carb with it. Good stuff.
 

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