SeaSierra Outboard Fuel Pump for Mercury 2-Stroke 30-300 HP — 14360A78 Direct-Fit, Durable Replacement

SeaSierra 14360A78 is a direct-fit replacement fuel pump assembly engineered to restore reliable fuel delivery on Mercury 2-stroke outboards from 30 to 300 HP.

When your Mercury outboard shows inconsistent throttle response, hard starting, or intermittent stalling, worn internal fuel pump parts are a common cause. The SeaSierra 14360A78 replacement is manufactured to the original dimensions and materials so it fits into the factory fuel system and aims to reestablish steady fuel flow. Built from wear-resistant stable material, this pump is intended as a durable service part compatible with many Mercury kit numbers.

Which Mercury engines and part numbers does this pump replace?

The SeaSierra 14360A78 is compatible with a wide range of Mercury 2-stroke outboards rated between 30 and 300 horsepower. It replaces several Mercury OEM part numbers, making it a convenient option when matching legacy or cross-referenced service parts.

• Fits Mercury 2-stroke models: 30hp–300hp (including 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, 100, 105, 115, 125, 135, 140, 150, 175, 200, 225, 250, 300).
• Cross-replaces: 14360A78, 14360A71, 14360A43, 14360A41, 14360A14, 14360A15.
• Also interchangeable with: 14360A16, 14360A24, 14360A27, 99357A4, 14360A73, 14360A49, 14360A50.

How does this SeaSierra pump improve my outboard’s performance?

By restoring proper internal pump components, the unit helps maintain consistent fuel pressure and flow to the carburetion or fuel injection system. That steadier delivery reduces surging and throttle hesitation caused by worn or leaking pump internals, improving boat handling and engine responsiveness.

• Stable material resists wear and stretching for longer service life.
• Tighter tolerances reduce fuel leakage and pressure loss.
• Smoother fueling decreases chances of stalling and rough idling.

Is installation straightforward and what should I check during replacement?

Installation is generally direct when replacing like-for-like pump assemblies on compatible Mercury models. Still, inspect gaskets, fittings, fuel lines and mounting hardware while you have the pump out to ensure a reliable reassembly and leak-free operation.

• Confirm model/year compatibility before disassembly.
• Replace worn seals, clamps, and fuel lines at the same time.
• Bleed the fuel system per Mercury service instructions after fitting.

What are the build and durability features of this replacement pump?

SeaSierra manufactures this pump from a stable, wear-resistant material designed to match original dimensions and tensile properties. The material choice and manufacturing tolerances aim to provide a dependable alternative to OEM parts while resisting common causes of internal pump failure.

• Durable, tear-resistant material for internal components.
• Manufactured to original standard fit and dimensions.
• Quality control to ensure consistent replacement performance.

Who is this for: The SeaSierra 14360A78 outboard fuel pump is intended for boat owners, marine mechanics, and service shops maintaining Mercury 2-stroke outboards from 30 to 300 HP who need a reliable replacement for worn internal fuel pump parts. Choose this part if you want a direct-fit alternative to the listed Mercury part numbers, are performing routine pump service, or are troubleshooting fuel delivery problems—while also replacing any aging seals, hoses, or clamps during the same maintenance interval.