| 摘要 |
PROBLEM TO BE SOLVED: To immediately stop an engine at the stopping operation of the engine. SOLUTION: This engine has a throttle valve 8 placed in a mixing body 4 of a carburetor 2, and a slow port 26 and an idle discharge hole 27 of a slow system fuel supply passage 25 is placed near the throttle valve 8 in an inner wall of the mixing body 4. A throttle full opening means 41 detects a key switch 45 switched to an OFF position for an engine stopping operation, and the throttle valve 8 is forcedly full-opened based on the detection.
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