Fuel Pump Assembly – Fits Mercury/Mariner 15-55HP 2-Stroke Outboards (Replaces 43113T, 43113M)
Fuel Pump Assembly – Fits Mercury/Mariner 15-55HP 2-Stroke Outboards (Replaces 43113T, 43113M) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Fuel Pump Assembly – Fits Mercury/Mariner 15-55HP 2-Stroke Outboard...
Fuel Pump Assembly – Fits Mercury/Mariner 15-55HP 2-Stroke Outboards (Replaces 43113T, 43113M) is backordered and will ship as soon as it is back in stock.
Product Details
This Fuel Pump Assembly – Fits Mercury/Mariner 15-55HP 2-Stroke Outboards (Replaces 43113T, 43113M) is a direct-fit replacement for a wide range of 1970s–1990s models, including the 9.5A, 12A, 15A, 20C, 25C, 30A, 40, 55, and W-55 series.
It serves as a direct interchange for Mercury part numbers 43113T, 43113M, 93045M, 94799M, 84651M, 81328M, 84139M, and 853729A1, as well as aftermarket equivalents.
- Designed for simple external outboard mounting.
- Engineered specifically for through-propeller exhaust systems on certain models.
- Includes essential gasket and hose clamp for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 43113T |
| Mercury | 43113M |
| Mercury | 93045M |
| Mercury | 94799M |
| Mercury | 84651M |
| Mercury | 81328M |
| Mercury | 84139M |
| Mercury | 853729A1 |
| Aftermarket | AM43113T |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This fuel pump is compatible with a range of Mercury and Mariner 2-stroke outboards.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 9.5A | 9.5 | 2-Stroke | 43113T/43113M | |
| Mercury | 12A | 12 | 2-Stroke | 43113T/43113M | |
| Mercury | 15A, 15 | 15 | 2-Stroke | 43113T/43113M | |
| Mercury | 20C | 20 | 2-Stroke | 43113T/43113M | Through prop. exhaust |
| Mercury | 25C | 25 | 2-Stroke | 43113T/43113M | Through prop. exhaust |
| Mercury | 30A | 30 | 2-Stroke | 43113T/43113M | |
| Mercury | 40 | 40 | 2-Stroke | 43113T/43113M | Twin Carb, w/oil injection, w/auto-blend |
| Mercury | 55, W-55 | 55 | 2-Stroke | 43113T/43113M | |
| Mercury | 70 | 70 | 2-Stroke | 43113T/43113M | |
| Mariner | 9.5A | 9.5 | 2-Stroke | 43113T/43113M | |
| Mariner | 12A | 12 | 2-Stroke | 43113T/43113M | |
| Mariner | 15A, 15 | 15 | 2-Stroke | 43113T/43113M | |
| Mariner | 20C | 20 | 2-Stroke | 43113T/43113M | Through prop. exhaust |
| Mariner | 25C | 25 | 2-Stroke | 43113T/43113M | Through prop. exhaust |
| Mariner | 30A | 30 | 2-Stroke | 43113T/43113M | |
| Mariner | 40 | 40 | 2-Stroke | 43113T/43113M | Twin Carb, w/oil injection, w/auto-blend |
| Mariner | 55, W-55 | 55 | 2-Stroke | 43113T/43113M | |
| Mariner | 70 | 70 | 2-Stroke | 43113T/43113M |
Technical Specs
- Product Type
- Fuel Pump Assembly
- Installation
- External/Outboard mounted
- Fuel Type
- Gasoline
- Connection
- Hose barb
- Housing Material
- Stainless Steel
- Housing Color
- Silver/Metallic
- Weight
- 181g (0.4 lbs)
- Fitting Type
- Barbed
- Other Technical Attributes
- This pump is designed specifically for through-propeller exhaust systems on certain models
What’s in the Box
- 1 x Fuel Pump Assembly (43113T/43113M)
- 1 x Hose clamp (90467-08004-00)
- 1 x Gasket (650-24431-A0-00)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery terminals for safety.
- Relieve any pressure in the fuel system by following your engine manufacturer's procedure.
- Place a rag under the existing fuel pump to catch any spilled fuel.
- Carefully disconnect the inlet and outlet fuel lines from the pump. Note their orientation.
- Remove the mounting bolts securing the old pump and remove the pump and its gasket.
- Clean the mounting surface on the engine block, ensuring it is free of old gasket material.
- Position the new gasket and fuel pump, then secure it with the mounting bolts. Do not overtighten.
- Reconnect the fuel lines to the correct ports on the new pump and secure the clamps.
- Reconnect the battery, prime the fuel system according to your engine's manual, and check thoroughly for any leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my fuel pump is failing?
Common signs include the engine sputtering, loss of power, difficulty starting, or stalling, especially under load or at high speeds. You may also notice fuel starvation issues where the engine cannot get enough fuel to run properly.
Is this pump compatible with ethanol-blended fuels?
Yes, this fuel pump is designed to be compatible with modern marine gasoline, including fuels containing up to 10% ethanol (E10). Avoid using fuels with higher ethanol concentrations unless specified as safe by your engine manufacturer.
What causes an outboard fuel pump to fail?
Failure can result from normal wear and tear over time, corrosion from water in the fuel, or blockages caused by debris bypassing a clogged or missing fuel filter. Using old or contaminated fuel can accelerate wear.
Do I need to replace the fuel filter at the same time?
It is highly recommended. A new fuel pump can be quickly damaged by contaminants from an old, dirty filter. Replacing the filter ensures a clean fuel supply and protects your new pump.
What is the difference between this pump and the original?
This aftermarket pump is engineered to meet or exceed OEM specifications for fit, form, and function. It uses comparable materials and manufacturing processes but is available at a more competitive price point.
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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