The inertia from the weighty piston assembly helps prevent it from spinning quickly if the motor shaft turns, so it slides together the thread and into engagement; if the engine begins, the pinion is turned faster than its shaft, so it is thrown again away from engagement. Hydraulic Starter Some https://renqiu-haoye-motorcycle-p92467.theideasblog.com/36022257/a-review-of-alternator-parts