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Mercury | 300 Hour Service Kit | 150 EFI 4-Stroke | 8M0094233

The Mercury 150 EFI 4-Stroke 300 Hour Service Maintenance Kit – 8M0094233 provides the essential components required to perform the recommended 300-hour service on Mercury 150 HP FourStroke outboard engines. This complete maintenance kit includes engine oil, filters, ignition components, cooling system parts, and wear items needed to keep your outboard operating reliably and efficiently.

The 300-hour service interval is one of the most important scheduled maintenance milestones for Mercury outboards. Replacing the spark plugs, thermostat components, fuel filtration parts, and accessory belt helps maintain cooling efficiency, proper fuel delivery, and consistent ignition performance while protecting internal engine components.

What’s Included in This Kit

• 1 x Gallon 25W-40 Engine Oil
• 3 x Quarts 25W-40 Engine Oil
• 1 x Quart Gear Lube
• 1 x Oil Filter
• 1 x High Pressure Fuel Filter
• 2 x Gearcase Drain Seals
• 4 x Spark Plugs
• 1 x Thermostat Kit
• 1 x Belt
• 4 x Anodes

Benefits of the 300 Hour Service

• Maintain proper lubrication with fresh 25W-40 engine oil.
• Restore ignition performance with four replacement spark plugs.
• Ensure proper fuel filtration with a new high pressure fuel filter.
• Maintain cooling system performance with a replacement thermostat kit.
• Protect internal components with a new oil filter and fresh gear lube.
• Maintain accessory drive reliability with a replacement belt.
• Reduce corrosion with new anodes.
• Protect the gearcase with new drain seals during service.

Engine Compatibility

• Mercury 150 HP EFI FourStroke Outboards
• Serial Number 1B905505 and Higher

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

• Engine Application
  • 150 HP EFI SeaPro - 2B139139 & Up
  • 135 HP EFI - 2B131942 & Up
  • 105 HP EFI Jet - 3B672358 & Up
  • 150 HP EFI - 1B905505 & Up