Mechanical Fuel Pump SIERRA 18-7278

Compatible Engines

Ensure the reliability of your vessel by choosing the SIERRA 18-7278 mechanical fuel pump. This high-quality replacement restores fuel system performance in your outboard motor. It is designed for popular units, including MERCURY/MARINER and OMC engines with capacities of 2.5L (series 140), 3.0L (series 470, 485, 488), and MCM 120 models. Precision engineering guarantees steady fuel pressure, essential for smooth operation and engine longevity.

Important Compatibility Note: As source data may not list all models, verify fitment before purchase. Compare part number 18-7278 with your engine's OE number. If unsure about fitment for a specific year or version, contact our support team. Our experts will help you select the correct part and avoid ordering errors.

Installation and Maintenance

Replacing the fuel pump is key to preventive maintenance. A worn pump may leak or fail to deliver adequate fuel, causing power loss or unstable idle. During installation, ensure the system is clean and inlet/outlet lines are connected correctly. Regular replacement prevents breakdowns during trips.

• SIERRA Original Quality – guarantees durability and standard compliance.
• Direct Replacement – perfect fit for select Mercury/OMC engines.
• Optimal Flow – stable fuel supply for better performance.
• Easy Replacement – standard design simplifies workshop servicing.