Spark plug use and maintenance

First, the correct installation of spark plug 1, in accordance with the requirements of the specification, use the specified specifications and models of spark plugs. 2. The contact surface between the spark plug and the gasoline engine must be clean and flat. 3. When installing spark plugs, copper washers must be installed on the spark plugs to ensure the tightness of the cylinders. 4. When tightening the spark plug, it is best to use a torque wrench to tighten the spark plug according to the specified torque. If there is no torque wrench, the spark plug can be tightened by hand first, and then the socket wrench can be used to screw 3/4 turns. Second, the maintenance of spark plugs Under normal circumstances, four-stroke gasoline engine work 100-200h, two-stroke gasoline engine work 30-50h, they must be disassembled, cleaned, and adjusted the gap between the spark plug plates. 1, cleaning. Dip the spark plug into the gasoline, scrub the dirt with a brush, or gently remove the deposit with a spatula. Do not brush with a metal brush, not to use fire instead of cleaning, so as not to damage the spark plug. 2, adjust. After the spark plug is cleaned and dried, the gap of the spark plug shall be adjusted according to the provisions of the operating instructions of the gasoline engine. 3, keep the spark plug insulator clean, so as not to affect its normal operation.