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Mercury | 300 Hour Service Kit | Verado L6 | 8M0097859

The Mercury Verado L6 300 Hour Service Maintenance Kit – 8M0097859 includes the critical components required to perform the recommended 300-hour service on Mercury Verado inline-six outboards from 200 HP through 350 HP. Designed for engines with serial numbers 2B144122 and below, this comprehensive maintenance kit bundles the essential oils, filters, ignition components, cooling system parts, and wear items needed to maintain peak performance and long-term reliability.

The 300-hour maintenance interval is one of the most important service milestones for Verado engines. Replacing the water pump components, spark plugs, thermostat, filters, and drive belt helps maintain cooling efficiency, fuel delivery, and ignition performance while protecting internal engine components. This kit consolidates the required maintenance parts into one convenient package, simplifying routine service.

What’s Included in This Kit

• 2 x Gallons 25W-40 Synthetic Blend Engine Oil
• 2 x Quarts Gear Lube
• 1 x Oil Filter
• 1 x In-Line Fuel Filter
• 1 x Water Separator Fuel Filter
• 2 x Gearcase Drain Seals
• 1 x Water Pump Repair Kit
• 6 x Spark Plugs
• 1 x Thermostat Assembly
• 1 x Oil Drain Seal
• 1 x Anode Kit
• 1 x Belt

Benefits of the 300 Hour Service

• Maintain optimal lubrication with fresh 25W-40 synthetic blend engine oil.
• Protect cooling system performance by replacing the water pump components and thermostat.
• Restore ignition performance with six new spark plugs.
• Ensure proper fuel filtration with new in-line and water separating fuel filters.
• Protect gearcase components with fresh gear lube and new drain seals.
• Maintain accessory drive reliability with a new engine belt.
• Reduce corrosion with a replacement anode kit.

Engine Compatibility

• Mercury Verado 200 HP L6
• Mercury Verado 225 HP L6
• Mercury Verado 250 HP L6
• Mercury Verado 275 HP L6
• Mercury Verado 300 HP L6
• Mercury Verado 350 HP L6
• Serial Numbers 2B144122 and Below

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

• Engine Application
  • 225 HP Verado 6 CYL - 2B144123-2B578935
  • 250 HP Verado 6 CYL - 2B144123-2B578935
  • 275 HP Verado 6 CYL - 2B144123-2B578935
  • 300 HP Verado 6 CYL - 2B144123-2B578935
  • 200 HP Verado 6 CYL - 2B144123-2B578935