VALVE SCREW 10-825046

Function and technical context

The 10-825046 Valve Screw is a precision fastener that ensures correct positioning and tight sealing of the valve within the marine engine timing system. This component works in the distribution circuit, where it controls the flow of air-fuel mixture and exhaust gases in the engine cylinders. Its correct tightening and condition is essential to maintain the tightness of the combustion chamber, avoid compression leaks and guarantee that the engine develops its nominal power without loss of performance.

When to replace this part?

Symptoms of valve screw failure include loss of engine power, rough running, difficulty starting when cold and, in advanced cases, water entering the combustion chamber. It is recommended to inspect its condition during each seasonal inspection and, in particular, if the engine has been operated under extreme load or after a long period of non-use. Replacing this bolt preventatively when performing valve maintenance prevents costly collateral damage to the head and cylinder.

Engine Compatibility

Mercury/MerCruiser

Equivalent manufacturer part numbers