5.0L 5.7L MPI Alpha RWC Mercruiser 300 Hour Service Kit SERV KIT-300 HRS (8M0147068)

The 5.0L 5.7L MPI Alpha RWC Mercruiser 300 Hour Service Kit SERV KIT-300 HRS is a comprehensive, model-specific service kit tailored to maintain peak performance and extend the life of your MerCruiser engine. Designed for 5.0L and 5.7L Multi-Port Injection (MPI) models paired with Alpha stern drives and equipped with raw water cooling (RWC), this 300-hour service kit provides all essential components to complete your scheduled maintenance with confidence.

At the 300-hour mark, your engine and drive system have been through hundreds of hours of intense load, heat, and vibration. This service kit ensures that the critical parts are replaced with genuine Mercury components, helping to reduce the risk of breakdowns and extend the longevity of your powertrain.

Included in this kit are high-demand service items such as the seawater pump impeller and housing, oil filter, fuel filter, spark plugs, gaskets, o-rings, and seals. These parts are designed to support vital functions including ignition performance, fuel system cleanliness, engine cooling, and leak prevention.

The seawater pump impeller is a core focus of 300-hour servicing, as it plays a crucial role in preventing overheating by ensuring steady water flow through the cooling system. Likewise, the replacement of filters and spark plugs maintains clean combustion, smooth operation, and reliable engine starts—especially under load or in varying water conditions.

Each part in this kit is a factory-certified OEM Mercury component. That means exact fitment, high durability, and proven compatibility with your specific engine configuration. Using genuine parts also helps preserve your engine warranty and supports long-term value retention.

Whether you’re performing the service yourself or bringing it to a qualified technician, this kit removes the guesswork by providing everything you need in one box—no hunting for individual parts or risking the use of inferior substitutes.

Regular 300-hour maintenance is essential to keeping your MerCruiser running strong, efficient, and ready for anything. Choose the 5.0L 5.7L MPI Alpha RWC Mercruiser 300 Hour Service Kit SERV KIT-300 HRS and keep your boating experience smooth, reliable, and stress-free.

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