25/30 EFI FourStroke 300 Hour Maintenance Kit
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Mercury Marine 25/30 EFI FourStroke 300 Hour Maintenance Kit
The Mercury Marine 8M0220189 Maintenance Kit is a genuine OEM service kit engineered specifically for Mercury 25-30hp FourStroke EFI outboard engines with serial number 1R154758 and higher. Designed to support proper 300-hour interval maintenance, this kit bundles all the critical replacement components required to keep your outboard running at peak efficiency and reliability.
Mercury maintenance kits are built to the same standards as original factory components, featuring premium-quality oil and fuel filters with high internal pleat counts for superior filtration performance. The electroplated filter housings provide heavy-duty corrosion resistance — important in the demanding marine environment. Every component in the kit is engineered to meet exact factory specifications for correct fit and function.
To complete the full service, Mercury recommends pairing this kit with genuine Mercury 4-Stroke Marine Engine Oil and Mercury Premium Gear Lube (858058K01), both sold separately. Using genuine Mercury OEM parts helps protect your engine warranty and ensures the best long-term performance of your outboard.
Key Features
- Fits Mercury 25-30hp FourStroke EFI outboards, serial number 1R154758 and higher
- Covers 300-hour scheduled maintenance interval
- Includes oil filter, fuel filter, oil drain seal, gearcase seals, thermostat and thermostat gaskets, spark plugs (3), water pump impeller kit, and unit anode
- Premium oil and fuel filters with high internal pleat counts for superior filtration
- Heavy-duty electroplated filter housings resist corrosion
- Genuine Mercury Marine OEM part — not aftermarket
- Backed by Mercury Marine's decades of engineering, testing, and manufacturing expertise
