Abstract: An ignition resumption control unit (40) is disposed that resumes control of an ignition plug (14) if a first predetermined time has elapsed or if engine rotation number has fallen below a threshold value, after receiving an engine stop signal. The ignition resumption control unit (40) executes the control of the ignition plug (14), based on resumption ignition timings (Tg(R-on)) that are timing deviating from an entire ignition timing range set in a normal working area of an engine body (2).

Abstract: To provide an exterior body to attach to an engine body, where the exterior body is not limited to where it may be installed, is safe and has excellent dust proofing capability. An engine exterior body (2) is provided with a frame body (20) configured to attach to an engine body (1); a shaft part (21) projecting from the surface of the frame body (20); and a rotator body (22) including a hole part (22a) loosely fitted and retained on the shaft part (21). The rotator body (22) rotates about the shaft part (21) by way of the vibrations transmitted to the shaft part (21) when engine body operates without receiving power from the engine body (1).

Abstract: To provide an exterior body to attach to an engine body, where the exterior body is not limited to where it may be installed, is safe and has excellent dust proofing capability. An engine exterior body (2) is provided with a frame body (20) configured to attach to an engine body (1); a shaft part (21) projecting from the surface of the frame body (20); and a rotator body (22) including a hole part (22a) loosely fitted and retained on the shaft part (21). The rotator body (22) rotates about the shaft part (21) by way of the vibrations transmitted to the shaft part (21) when engine body operates without receiving power from the engine body (1).