Lubricating system for air-cooled general-purpose engine

In an air-cooled general-purpose engine comprising:

• a cooling fan fixed to one end portion of a crankshaft supported by an engine main body, the one end portion protruding outward from one end wall of the engine main body;
• and
• a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan,
• a lubricating system for the air-cooled general-purpose engine, comprising:
• an oil pump which pumps up an oil from an oil reservoir in a bottom portion of the engine main body;
• and
• an oil-supply path which is formed in the one end wall facing the cooling-air path and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, wherein
• a jet for jetting the oil is provided in an opening of the oil-supply path which is open to the valve operating chamber,
• the cooling fan supplies cooling air inside the cooling-air path, and
• an inner diameter of the jet is smaller than an inner diameter of the oil-supply path.