Complete 300-Hour Maintenance Kit – Keep Your Outboard Running Smoothly

This 300-hour service kit is specifically designed for Mercury/Mariner 50HP & 60HP EFI 4-Cylinder 4-Stroke outboards with a standard gearbox. It includes all the essential components needed for routine maintenance, ensuring optimal engine performance, reliability, and protection.

⚠ This kit is for STANDARD GEARBOX models only. It WILL NOT fit High Thrust or Command Thrust models.

What’s Included?

✔ 4x Spark Plugs – Ensures smooth ignition and efficient combustion
✔ 1x Impeller – Essential for proper cooling system function
✔ 1x Impeller Gasket – Prevents leaks in the cooling system
✔ 2x Gearbox Oil Drain Seals – Helps maintain proper lubrication
✔ 1x Fuel Filter – Protects against fuel contamination
✔ 1x Secondary Fuel Filter – Ensures clean fuel supply
✔ 1x Oil Filter – Removes contaminants for long-lasting engine health
✔ 1x Thermostat & Gasket – Regulates engine temperature for efficiency
✔ 1x Complete Anode Set – Prevents corrosion and extends engine life

🔹 No oils included – Please ensure you have the correct lubricants for your outboard.

Why Choose SSI MARINE Service Kits?

✔ Expertly Designed – Based on real outboard service experience.
✔ Complete Protection – Includes anode set & thermostat for full maintenance.
✔ Premium Quality Parts – A mix of genuine and high-quality aftermarket components.
✔ Affordable & Reliable – Designed to meet or exceed manufacturer standards.
✔ Fast UK Shipping – Dispatched same-day for orders before 1 PM (next working day if later).

⚠ Verify Compatibility Before Purchase

Outboards have different models, years, and variations. Double-check compatibility before purchasing. If unsure, contact our expert team for assistance.

⚠ Not compatible with High Thrust or Command Thrust models.

📦 Fast & Secure UK Shipping

🚀 Tracked 24-hour delivery for fast and reliable shipping.

🔧 Order your Mercury/Mariner 50HP 60HP EFI 300-Hour Service Kit today and keep your outboard in top condition! 🚤

Mercury Mariner 50HP 60HP 4-Cyl EFI 4-Stroke 300-Hour Service Kit (Standard Gearbox Only)