This high-quality water pump impeller is designed for Evinrude Johnson OMC 2/4-stroke engines with power outputs of 4, 4.5, 5, 6, 7.5, or 8 HP. Manufactured from durable rubber, it ensures long-lasting performance even after extended periods of immersion in salt water. The impeller is compatible with various models, including those with part numbers 0389576, 0436137, 0777822, and 18-3091. To ensure proper fitting, always verify the suitability using the information on the engine nameplate. This OEM# replacement part is ideal for maintaining your outboard engine's water pump in optimal condition.