Patent ID: 7757674

Claim:
An internal combustion engine, comprising: a crankcase having a crankshaft rotatably disposed therein; a blower driven by said crankshaft to generate an air stream; at least one cylinder connected to said crankcase, said cylinder including an exhaust port and an exhaust pipe connected to said exhaust port and communicating with a muffler; a carburetor in fluid communication with said cylinder; and an intake air heating arrangement, comprising: a heater box disposed proximate said cylinder, at least a portion of said heater box secured between said exhaust port and said exhaust pipe, an interior of said heater box in airflow communication with said air stream and with said air intake system, whereby air from said air stream is heated within said heater box and is conducted into said carburetor of said engine; further including a cylinder wrap at least partially enclosing said cylinder and said carburetor, said cylinder wrap defining an air passage in airflow communication with the blower so that the blower moves air past the muffler for heating thereby and then to an outside of the carburetor so that the air heats the carburetor.