MERCURY CARBURETOR 804766A05

Function and technical context

The carburetor is the essential component of the fuel supply system in small displacement petrol engines. Its main function is to dose and atomize the fuel, mixing it with air in the correct proportion so that the mixture burns efficiently in the cylinders. In 4-stroke engines such as Mercury 4, 5 and 6 hp, the carburetor automatically regulates this mixture according to operating conditions, ensuring reliable starting, smooth acceleration and optimal navigation performance. A carburetor in poor condition causes loss of power, excessive fuel consumption, difficult starts and in serious cases, engine blockage due to lack of power.

When to replace this part?

Typical symptoms of a damaged carburetor include difficulty starting when cold, irregular revs at idle, jerks during acceleration, lack of throttle response, and visible carbon deposits in the injection nozzles. It is recommended that the carburetor be checked and cleaned at the beginning of each boating season, especially if the boat has been idle for long periods. Preventative carburetor replacement prevents power loss on the water and ensures reliable operation all season long.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers