EXHAUST VALVE 832990 PAF25-05050002

Function and technical context

The 832990 PAF25-05050002 exhaust valve is an essential component of the intake and exhaust system in marine outboard engines. This part regulates the flow of combustion gases and controls the precise opening and closing in the engine cycle, allowing the burned gases to leave the combustion chamber at the exact moment. Its correct operation is essential to maintain the efficiency of the thermodynamic cycle, guarantee the nominal power of the engine and prevent the accumulation of abnormal pressure in the cylinder. Wear or blockage of this valve directly affects performance, fuel consumption and rev stability.

When to replace this part?

Symptoms of aging include progressive loss of power, difficulty starting, irregular idling or increased fuel consumption. In engines with intense use or in salt water, it is recommended to inspect this valve every 200-300 hours of operation and replace it preventively when detecting carbon deposits, seat erosion or loss of tightness. Replacing this part preventively prevents sudden breakdowns in navigation and prolongs the useful life of the engine.

Engine compatibility table

Mercury/MerCruiser

Equivalent manufacturer part numbers

This valve is marketed under multiple references depending on the manufacturer and the market. Mercury uses part numbers 832990, 832990T1, 832991T3, and 8M0065029 to identify this part in its service catalogs. Parsun distributes it under the reference F25-05050002, while Yamaha uses the codes 62Y-12121-00, 62Y1212100, 64J-12121-10 and 64J1212110. At Marine Parts we have permanent stock in Spain with fast shipping to the entire Peninsula and the Balearic Islands. If you have questions about the exact compatibility with your engine, we recommend that you contact our technical support team before placing your order.