Where are lifters located in a small engine?

Lifters, also known as tappets, are components located on the camshaft lobes in a small engine. Their primary function is to transmit the motion of the camshaft to the engine's valves. As the camshaft rotates, the lobes push up against the lifters, which then push down on the rocker arms and open the valves at the appropriate times in the engine’s cycle. This precise timing is crucial for the engine’s operation, as it ensures that fuel and air enter the combustion chamber and exhaust gases exit properly.

The positioning of lifters on the camshaft allows them to effectively accommodate the rotational movement of the cam, enabling the engine to run smoothly and efficiently. Understanding the role of lifters is essential for troubleshooting and repairing small engines, as problems in this area can lead to valve timing issues and, ultimately, engine performance problems.