SUCTION TUBE UNIT OF STRATIFIED SCAVENGING ENGINE

A suction tube unit (16) connected between a cylinder block (12) and a carburetor (14) in a stratified scavenging engine (10) has a suction tube for mixture (30) made of an elastic material; and a suction tube for stratified scavenging air (32) made of an elastic material. The suction tube for mixture (30) and the suction tube for air (32) have, at respective inlet ends (30a, 32a) connected to the carburetor (14), respective wall portions (36, 38) which face each other and have complementary shapes. A clearance space (40) is provided between the wall portions (36, 38) of the suction tube for mixture (30) and the suction tube for air (32).