How are the breaker points typically configured?

The configuration of breaker points in a small engine, particularly in ignition systems, is primarily designed to control electrical current to the ignition coil. The correct configuration involves one fixed point and one movable point, with the movable point mounted on a spring-loaded arm.

In practice, as the engine’s mechanical parts rotate, the movable breaker point opens and closes in response to a cam. This fluctuating contact point enables electrical arcs to ignite the air-fuel mixture in the engine cylinder at the correct moment. The spring-loaded mechanism allows for reliable operation as it provides the necessary tension to maintain contact until the cam pushes it apart, ensuring effective ignition timing.

This design contrasts with configurations where both points are movable or fixed, which would not provide the necessary timing control or electrical functionality needed for efficient engine operation. Using a conductive rubber material is also impractical for breaker points due to the high voltage and heat generated during ignition events, which requires durable metal contacts for reliable performance.