Hand Fuel Primer Bulb – Fits Mercury, Yamaha, Johnson/Evinrude (Replaces 9001080A, 50073805, 73805)
Hand Fuel Primer Bulb – Fits Mercury, Yamaha, Johnson/Evinrude (Replaces 9001080A, 50073805, 73805) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Hand Fuel Primer Bulb – Fits Mercury, Yamaha, Johnson/Evinrude (Rep...
Product Details
This high-quality Hand Fuel Primer Bulb – Fits Marine/Boat/Outboard Motors (Replaces 9001080A, 3/8") is designed for most marine vessels with 3/8" (10mm) fuel lines. It is suitable for outboard motors from major brands like Mercury, Yamaha, and Johnson/Evinrude that use low-pressure carbureted fuel systems.
It serves as a direct replacement for multiple OEM and aftermarket parts, including Mercury 9001080A and Johnson/Evinrude 50073805, among others requiring a 3/8" primer bulb.
- Installs in-line with your existing fuel hose.
- Constructed with aging-resistant NBR rubber for durability in marine environments.
- Features a one-way internal check valve for reliable fuel flow.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury / Mariner | 9001080A |
| Johnson / Evinrude | 50073805, 73805 |
| Scepter Marine | 3/8" EPA/CARB Primer Bulb |
| JLM Marine | 3/8" Hand Fuel Pump |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner, this part fits a wide range of 2-stroke and 4-stroke carbureted outboards from 4 to 300 HP.
For Johnson/Evinrude, this part is compatible with various 2-stroke and 4-stroke carbureted models from 2 to 140 HP.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Various Outboards | 4-300 HP | 2-Stroke & 4-Stroke | Various | 9001080A | For carbureted models only |
| Johnson/Evinrude | Various Outboards | 2-140 HP | 2-Stroke & 4-Stroke | Various | 50073805, 73805 | For carbureted models only |
Technical Specs
- Product Type
- Hand Fuel Primer Bulb / Fuel Pump
- Installation
- In-line
- Fuel Type
- Gasoline, Diesel (Low-pressure systems)
- Connection
- 3/8" (10mm) Hose Barbs on both ends
- Housing Material
- NBR (Nitrile Butadiene Rubber) with aluminum alloy components
- Housing Color
- Black
- Dimensions
- Approximately 15 cm × 5 cm × 5 cm
- Weight
- Approximately 0.1 kg (0.22 lbs)
- Fitting Type
- Barbed hose fittings
- Working Pressure
- Low-pressure carbureted systems (3-6 PSI)
- Operating Temperature
- -20°C to 60°C (-4°F to 140°F)
- Other Technical Attributes
- One-way internal check valve; Aging-resistant construction; Compatible with ethanol-blend fuels
What’s in the Box
- 1 × Hand Primer Bulb with 3/8" (10mm) Hose Barbs (9001080A, 50073805, 73805)
Installation Notes
- Ensure the engine is off and cool. Disconnect the battery for safety.
- Place a rag or container under the fuel line to catch any spillage.
- Note the fuel flow direction, indicated by an arrow on the old bulb.
- Using pliers, loosen the clamps on the old primer bulb and slide them away from the ends.
- Carefully twist and pull the fuel lines off the old bulb's barbs.
- Install the new primer bulb, making sure the arrow points in the direction of fuel flow (towards the engine).
- Secure the fuel lines onto the new barbs and reposition the clamps to ensure a tight seal.
- Squeeze the new bulb several times until it feels firm, which indicates it is filled with fuel.
- Check thoroughly for any leaks around the connections.
- After confirming there are no leaks, reconnect the battery, start the engine, and check again.
Troubleshooting & FAQ
How do I know if this primer bulb fits my engine?
This bulb is designed for universal application on carbureted marine engines using a 3/8" (10mm) fuel line. Please check your fuel line diameter and cross-reference your OEM part number with our Part Number Matrix. It is not suitable for high-pressure EFI/DFI systems.
What is the correct installation orientation?
The primer bulb must be installed with the molded arrow pointing in the direction of fuel flow. On most boats, fuel flows from the tank towards the engine. Incorrect installation will prevent fuel from reaching the engine.
What are the signs of a failing primer bulb?
Common signs include the bulb becoming hard or brittle, visible cracks, fuel leaks, the bulb not staying firm after pumping, or difficulty starting the engine due to a loss of prime.
How often should I replace my fuel primer bulb?
As a preventative maintenance item, we recommend inspecting it annually and replacing it every 2-3 years, or immediately if you notice any signs of wear, cracking, or leakage. Continuous exposure to sun and ethanol-blended fuels can accelerate aging.
Will this work with ethanol-blend fuels?
Yes, this primer bulb is constructed from NBR (Nitrile Butadiene Rubber), which is compatible with modern gasoline containing up to 15% ethanol (E10, E15).
The bulb won't get firm after pumping. What's wrong?
This can be caused by a few issues: 1) The bulb is installed backward (check the flow arrow). 2) There is an air leak elsewhere in the fuel line or at a connection. 3) The internal check valves are not sealing. 4) The fuel tank pickup is clogged. Ensure all connections are tight and the bulb is oriented correctly.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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