ROCKER SPRING 24-825452001

Function and technical context

The rocker spring is a critical component of the timing system on Mercury, Mariner, MerCruiser, OMC, Parsun and Tohatsu two-cylinder engines. This element acts as an articulated support that facilitates the oscillating movement of the camshaft, allowing the synchronized opening and closing of the valves during the combustion cycle. Its correct operation guarantees the precision of valve timing, essential to maintain engine power, fuel consumption efficiency and thermal stability. A defective or worn rocker spring compromises the timing alignment, causing loss of power, rough idling and possible secondary damage to valves and cylinder head.

When to replace this part?

The rocker spring should be inspected at every seasonal maintenance check, especially after extended winters or periods of inactivity. Symptoms of wear include abnormal metallic noises in the cylinder head, progressive loss of power, difficulty starting when cold and abnormal vibrations while driving. Preventive replacement during valve timing or overhaul work avoids costly repairs and ensures optimal engine performance in demanding navigation.

Engine Compatibility

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers