Hand Fuel Primer Bulb – Fits Marine/Boat/Outboard Motors (Replaces 9001080A, 3/8")

Hand Fuel Primer Bulb – Fits Marine/Boat/Outboard Motors (3/8")

This hand fuel primer bulb is suitable for most marine vessels, outboard motors, and other applications requiring a fuel primer bulb with 3/8" (10mm) hose barbs. It is designed for use with standard low-pressure carbureted fuel systems on major marine brands.

Direct Replacements: Mercury 3/8" Primer Bulb, Yamaha 3/8" Primer Bulb, Johnson/Evinrude 3/8" Primer Bulb, Scepter Marine 3/8" EPA/CARB Primer Bulb, and JLM Marine 3/8" Hand Fuel Pump.

• Compatible with gasoline and diesel in low-pressure systems.
• Features an in-line installation design with 3/8" (10mm) hose barbs on both ends.
• Constructed from durable, aging-resistant NBR rubber with a one-way internal check valve.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

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.

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson Serial Number Guide.

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

Confirm your engine model/year in the table below. For Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 × Hand Primer Bulb with 3/8" (10mm) Hose Barbs (Replaces 9001080A, 50073805, 73805)

Installation Guide

1. Safety First: Ensure the engine is off and cool, and work in a well-ventilated area. Disconnect the battery as a precaution.
2. Relieve Fuel Pressure: If your system has a valve, use it to safely relieve any pressure. Otherwise, have a rag ready to catch minor spillage.
3. Locate the Bulb: Find the existing primer bulb in the fuel line, typically running from the fuel tank to the engine.
4. Note Fuel Direction: The old primer bulb will have an arrow indicating the direction of fuel flow. The new bulb must be installed in the same orientation.
5. Remove Old Bulb: Use pliers or a screwdriver to loosen the hose clamps on both ends of the old bulb. Gently twist and pull the hoses off the barbs.
6. Position New Bulb: Align the new primer bulb with the fuel flow arrow pointing towards the engine.
7. Secure Connections: Slide the hoses firmly onto the new 3/8" barbs and secure them tightly with the hose clamps.
8. Prime the System: Squeeze the bulb repeatedly until it feels firm. This fills the bulb and carburetor with fuel.
9. Inspect for Leaks: With the system primed, carefully check the connections at both ends of the bulb for any signs of fuel leakage.
10. Test the Engine: Reconnect the battery, start the engine, and let it run for a few minutes while monitoring for leaks and ensuring smooth operation.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?

A: This primer bulb is designed for universal application on carbureted marine engines using a 3/8" (10mm) fuel line. It serves as a direct replacement for parts like Mercury 9001080A and Johnson/Evinrude 50073805. Please verify your fuel line diameter and confirm your engine does not use a high-pressure Electronic Fuel Injection (EFI) or Direct Fuel Injection (DFI) system, as this part is only for low-pressure applications (3-6 PSI).

Q: What are the signs that my current primer bulb needs to be replaced?

A: Common failure signs include visible cracks, brittleness, or leaks on the rubber bulb; the bulb failing to become firm when squeezed (indicating a faulty check valve); or difficulty starting your engine due to a lack of fuel.

Q: Can I use this with ethanol-blended fuels?

A: Yes. It is constructed with an NBR (Nitrile Butadiene Rubber) housing and is compatible with modern ethanol-blend fuels like E10.

Q: Is this primer bulb for gasoline or diesel?

A: It is compatible with both gasoline and diesel fuel in low-pressure systems.

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.