Mercury Marine | 300 Hour Service Kit | V8 4.6L Verado & SeaPro | 10W-30 Synthetic Blend | 8M0149932

The Mercury V8 4.6L Verado & SeaPro 300 Hour Service Kit – 8M0149932 provides the essential maintenance components required to complete the recommended 300-hour service on Mercury 4.6L V8 outboards. Designed for both recreational and commercial applications, this kit helps simplify scheduled maintenance while supporting long-term engine reliability and performance.

This service kit includes Mercury 10W-30 Synthetic Blend marine engine oil, SAE 90 High Performance Gear Lube, and the critical maintenance components commonly replaced during the 300-hour interval. Performing routine service at the recommended intervals helps maintain proper lubrication, fuel delivery, cooling efficiency, and corrosion protection for demanding marine environments.

What’s Included in This Kit

• 1 x Mercury 300 Hour Maintenance Kit
• 1 x Gallon Mercury 10W-30 Synthetic Blend Marine Engine Oil
• 3 x Quarts Mercury 10W-30 Synthetic Blend Marine Engine Oil
• 1 x Quart Mercury SAE 90 High Performance Gear Lube

Typical Service Components Included

• Oil Filter
• Fuel Filters
• Spark Plugs
• Thermostat
• Alternator Belt
• Water Pump Repair Components
• Gearcase Drain Seals
• Corrosion Protection Anodes

Benefits of the 300 Hour Service

• Supports Proper Engine Lubrication: Mercury 10W-30 Synthetic Blend oil helps reduce friction and wear under demanding marine operating conditions.
• Protects Internal Gearcase Components: Fresh SAE 90 High Performance Gear Lube helps shield gears and bearings from excessive wear.
• Maintains Fuel System Efficiency: Replacement fuel filters help provide clean fuel delivery and dependable throttle response.
• Helps Maintain Cooling Performance: Water pump and thermostat service components support proper engine operating temperatures.
• Improves Ignition Reliability: New spark plugs help maintain smooth starts, idle quality, and combustion efficiency.
• Reduces Corrosion Concerns: New seals and anodes help protect critical engine components in freshwater and saltwater environments.

Engine Compatibility

• Mercury V8 4.6L Verado Outboards
• Mercury V8 4.6L SeaPro Outboards
• Mercury 250HP–300HP V8 Models

Always verify your Mercury outboard model and serial number before ordering to ensure compatibility with your engine.