This internal combustion engine is excellent and useful in the mileage as a prime mover from a power plant to a small generator or as an engine to be mounted on a mover such as a ship or a car.

Mainly for the internal-combustion engine start-up, ignition and lighting on watercraft and flat roof on the sea, battery series for watercraft, vessel.

Based on the authors practice experience, the paper puts forward some viewpoints as to the design and installation of spark extinguisher.