Fuel Pump Assembly – Fits Mercury/Mariner 30-300 HP 2-Stroke Outboards (Replaces 14360A78, 14360A73, 14360A43)

Fuel Pump Assembly – Fits Mercury/Mariner 30-300 HP 2-Stroke Outboards (Replaces 14360A78, 14360A73, 14360A43)

This mechanical fuel pump assembly is designed for Mercury and Mariner 2-stroke outboard engines ranging from 30 HP to 300 HP, manufactured approximately between 1992–2009. It serves as a direct replacement for multiple OEM part numbers, including the primary 14360A78 series.

Engineered for reliable fuel delivery, this pulse-driven pump ensures your 2-stroke outboard receives the correct fuel flow for optimal performance. It is constructed from cast aluminum with a durable rubber diaphragm to withstand the marine environment.

• Installation Type: Direct OEM replacement.
• Compatibility: Designed for gasoline-fueled 2-stroke outboards.
• Complete Kit: Includes the fuel pump assembly and a new mounting gasket.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers. This component is a direct replacement for the following OEM parts.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Fuel Pump Assembly (14360A78/14360A73/14360A43)
• 1 x Mounting Gasket (98769-1)

Installation Guide

1. Safety First: Disconnect the battery and ensure the engine is cool. Work in a well-ventilated area.
2. Relieve Fuel Pressure: Follow your engine's service manual to safely relieve pressure from the fuel system.
3. Disconnect Fuel Lines: Carefully label and disconnect the inlet, outlet, and pulse fuel lines from the pump. Have rags ready to catch any spilled fuel.
4. Remove Old Pump: Unscrew the mounting bolts holding the old fuel pump to the engine block.
5. Clean Surface: Remove the old gasket and thoroughly clean the mounting surface on the engine. Ensure it is free of debris.
6. Install New Pump: Place the new gasket, then position the new fuel pump. Hand-tighten the mounting bolts.
7. Torque Bolts: Tighten the bolts to the manufacturer's specified torque, usually in a crisscross pattern. Do not overtighten.
8. Reconnect Lines: Securely reattach the fuel lines to the correct fittings on the new pump.
9. Check for Leaks: Reconnect the battery, prime the fuel system, and start the engine. Carefully inspect for any fuel leaks around the pump and fittings.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: The best way is to verify your engine's horsepower, year, and serial number against our compatibility table. Also, cross-reference your existing part number with those listed. If your serial number is near the beginning or end of a range, visual confirmation is recommended.

Q: What are the signs of a failing fuel pump?
A: Common symptoms include difficulty starting, engine sputtering at high speeds, stalling, hesitation upon acceleration, or a noticeable loss of power. These issues indicate the engine may not be receiving a consistent fuel supply.

Q: Is there a difference between part 14360A78 and older versions like 14360A16?
A: Yes, while they are superseded and considered interchangeable, there can be minor cosmetic or design variations. This pump is designed to replace all listed versions, but always compare it to your old part before installing.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.