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

The Mercury V8 4.6L Verado & SeaPro 300 Hour Service Kit – 8M0149932 includes the essential maintenance components needed to complete the recommended 300-hour service on Mercury 4.6L V8 Verado and SeaPro outboards. Built for high-output offshore and heavy-use applications, this kit helps simplify scheduled maintenance by packaging key service items into one convenient solution.

Routine 300-hour maintenance helps support proper lubrication, clean fuel delivery, cooling system efficiency, and long-term engine reliability. Replacing worn service components at the recommended interval helps protect internal engine parts, reduce corrosion concerns, and keep your Mercury V8 outboard ready for dependable time on the water.

What’s Included in This Kit

• 1 x Mercury 300 Hour Maintenance Kit
• 1 x Gallon Mercury 10W-30 Marine Engine Oil
• 3 x Quarts Mercury 10W-30 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 Service Components
• Gearcase Drain Seals
• Anodes and Corrosion Protection Components

Benefits of the 300 Hour Service

• Maintains Engine Lubrication: Fresh Mercury marine engine oil helps reduce friction and protect internal engine components.
• Protects the Gearcase: Mercury High Performance Gear Lube helps guard gears and bearings from wear under heavy marine load.
• Supports Fuel System Performance: Replacement fuel filters help maintain clean fuel flow and reliable throttle response.
• Improves Cooling System Reliability: Water pump and thermostat service components help maintain proper engine operating temperature.
• Restores Ignition Performance: Fresh spark plugs support clean starts, smooth idle, and consistent combustion.
• Helps Prevent Corrosion: Replacement anodes and seals help protect key components in harsh marine 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.