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Mercury | 300 Hour Service Kit | V8 4.6L FourStroke | 8M0149931

The Mercury V8 (4.6L) FourStroke 300 Hour Service Kit – 8M0149931 includes the essential components required to complete the recommended 300-hour maintenance on Mercury 4.6L V8 FourStroke outboards. This comprehensive kit includes Mercury 10W-30 synthetic blend marine engine oil along with the key filters, cooling system components, ignition parts, and service items needed to properly maintain your outboard.

The 300-hour service interval addresses critical wear components to help maintain engine reliability, cooling performance, and overall efficiency. By packaging the required maintenance parts together, this kit simplifies scheduled service and helps keep your Mercury V8 FourStroke engine running smoothly.

What’s Included in This Kit

• 1 x Gallon 10W-30 Synthetic Blend Marine Engine Oil
• 3 x Quarts 10W-30 Synthetic Blend Marine Engine Oil
• 1 x Quart Mercury High Performance Gear Lube
• 1 x Oil Filter
• 1 x Fuel Filter
• 2 x Gearcase Drain Seals
• 1 x Thermostat
• Spark Plugs
• 1 x Alternator Belt
• 1 x Water Pump Repair Kit
• Anodes

Benefits of the 300 Hour Service

• Maintain proper engine lubrication with Mercury 10W-30 synthetic blend marine engine oil.
• Protect engine components with a replacement oil filter.
• Ensure clean fuel delivery with a new fuel filter.
• Maintain cooling system performance with a thermostat and water pump repair kit.
• Ensure consistent ignition with replacement spark plugs.
• Maintain charging system reliability with a new alternator belt.
• Protect against corrosion with replacement anodes.

Engine Compatibility

• Mercury V8 FourStroke Outboards – 4.6L

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

• Engine Application
  • 300 HP 4.6L V8 - 2B529482 & Up
  • 225 HP 4.6L V8 SeaPro - 2B529482 & Up
  • 250 HP 4.6L V8 SeaPro - 2B529482 & Up
  • 250 HP 4.6L V8 - 2B529482 & Up
  • 300 HP 4.6L V8 SeaPro - 2B529482 & Up
  • 200 HP 4.6L V8 Pro XS - 2B529482 & Up
  • 225 HP 4.6L V8 Pro XS - 2B529482 & Up
  • 205 HP 4.6L V8 Pro XS - 2B529482 & Up
  • 300 HP 4.6L V8 Pro XS - 2B529482 & Up