Cooling system for air-cooled engine

A method of operating a fan for an air-cooled internal combustion engine including a blower assembly having a blower housing and a fan configured to move air through the blower housing, the method comprising:

• starting the air-cooled internal combustion engine;
• determining if the fan operates in a first operating mode in which the fan rotates in a first direction or a second operating mode in which the fan rotates in a second direction;
• upon operating the fan in one of the first operating mode or the second operating mode, monitoring an input condition while the air-cooled internal combustion engine is running;
• detecting a change in the input condition and switching the fan from the one of the first operating mode or the second operating mode to another of the first operating mode or the second operating mode;
• determining if the air-cooled internal combustion engine is turned off;
• and
• upon determining that the air-cooled internal combustion engine is turned off, operating the fan in a shutdown mode.

A method of operating a fan for an air-cooled internal combustion engine including a blower assembly having a blower housing, a first fan configured to move air through the blower housing, and a second fan configured to move air through the blower housing, the method comprising:

• starting the air-cooled internal combustion engine;
• after starting the air-cooled internal combustion engine:
• operating the first fan in a cooling mode where the first fan rotates in a first direction;
• and
• operating the second fan in a debris-removal mode where the second fan rotates in a second direction opposite to the first direction.