300 Hour Maintenance Kit MerCruiser 4.3L MPI Engine with Bravo Sterndrive

Mercury 300 Hour Maintenance Kit MerCruiser 4.3L MPI Engine with Bravo Sterndrive

Keep your MerCruiser 4.3L MPI Bravo engine performing at its best with this genuine Mercury Marine 300 Hour Maintenance Kit (Part #8M0147065). Engineered specifically for MerCruiser engines produced by General Motors from 2002 onward, this all-in-one kit streamlines essential marine engine maintenance into a single, convenient package. As an authentic Mercury Marine factory OEM part — not an aftermarket substitute — this kit ensures guaranteed fitment and the highest standards of quality and reliability.

This kit covers all the critical service items needed at the 300-hour maintenance interval, including filtration, cooling system components, ignition, and drivetrain sealing. Mercury's maintenance kits are constructed with premium oil and fuel filters featuring high internal pleat counts for superior filtration efficiency, along with heavy-duty electroplated housings that resist corrosion in demanding marine environments. For optimal engine health, combine this kit with genuine Mercury 4-Stroke Marine Engine Oil and Mercury Premium Gear Lube, sold separately.

Key Features

• Genuine Mercury Marine OEM part — not aftermarket
• Designed for MerCruiser 4.3L MPI engines with Bravo Sterndrive, 2002 and newer
• All-in-one kit for complete 300-hour engine service interval
• Includes oil filter with high internal pleat count for superior filtration
• Includes fuel filter for clean fuel delivery
• Includes gearcase drain plug seals (2) to prevent drivetrain fluid leaks
• Includes spark plugs for reliable ignition performance
• Includes serpentine belt for accessory drive reliability
• Includes thermostat and gasket/seal for proper engine temperature management
• Includes IAC filter for intake air control maintenance
• Includes sea water pump impeller kit for Bravo applications to maintain cooling system efficiency
• Heavy-duty electroplated filter housing resists corrosion in marine environments
• Simplifies maintenance scheduling with a single comprehensive kit
• Trusted Mercury Marine engineering for best fit, function, and performance