| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine working machine capable of reducing a calorie to be heat-conducted from an intake of a cylinder to a carburetor via an insulator.SOLUTION: In an engine in which an insulator 25 forming an intake passage is interposed between the intake port 24 of a cylinder 11 and a carburetor 20, and a heat shield plate 5b is provided on the intake side of the cylinder 11, a heat radiation fin 40 having the thermal conductivity higher than that of at least the insulator is interposed and mounted between the intake port 24 and the insulator. The heat radiation fin 40 has a flat surface part 40a extending in the direction substantially perpendicular to the inflow direction of the air-fuel mixture. The heat shield plate 5b and the flat plate part 40a of the heat radiation fin 40 are arranged substantially in parallel with each other. A fin upper plate 40b and a fin side plate 40c extending to the carburetor 20 side are provided to the end of the heat radiation fin 40. |
