Small Engines (Lawn Mowers, etc.): Kohler 301S, air fuel mixture, correct fuel

Question
we bought a 1970s vintage wheelhorse model c 120 8 speed
with the above engine[ original?] fitted. it runs Ok on 95 ocane unleaded but spluuers onload. Is this correct fuel ?
any other info. would be appreciated
Bob/ East of Scotland UK

Answer
 Hello Bob:

 This Engine is Designed to Run on Regular Gas. Send me the Model, Type and Code Numbers Off of the Engine, Please. They are Usually Stamped into the Blower Housing(metal engine cover). With these Numbers I can Locate a Breakdown/IPL of the Engine and Better Assist you. However, it Sounds like the Carburetor Air/Fuel Mixture is Out of Adjustment. If this Engine has the Bowl Type Carburetor the High RPM Mixture Screw is Usually in the Bottom of the Carburetor Bowl. Turn this Screw Counter Clockwise 1/4 Turn and See if this Helps the Running of the Engine. If it Doesn't, then the Carburetor May need to be Cleaned or Rebuilt. Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks.

 Good Luck

 Respectfully

 John