Description
Product Overview
The iFJF Low Pressure Electric Fuel Pump is a direct replacement for the factory fuel pump on Volvo Penta 4.3L V6, 5.0L V8, and 5.7L V8 marine engines from 1992 through 2006. This pump delivers a consistent 4-7 PSI of fuel pressure to the carburetor — the exact specification these engines require. Whether you're replacing a failed pump, keeping a spare onboard, or doing a complete fuel system refresh, this pump provides reliable marine-grade performance at a fraction of dealer pricing.
Key Features
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Marine-Specific Application: Designed for the unique demands of marine environments — corrosion-resistant housing, sealed electrical connections, and consistent flow characteristics in rough water conditions.
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Correct Pressure Range: Delivers 4-7 PSI — the target pressure for carbureted Volvo Penta V6 and V8 engines. Too much pressure floods the carb; too little starves the engine at WOT.
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12V Universal Fit: Standard two-wire positive/negative connection. Includes mounting bracket and pre-attached fuel line fittings for common 5/16-inch and 3/8-inch marine fuel hose.
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Replaces OEM 21608511: Direct interchange with Volvo Penta part number 21608511 and equivalent aftermarket pumps.
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Quiet Operation: Rubber-isolated mounting bracket minimizes vibration transfer to the hull — a common complaint with generic electric pumps.
Compatibility Table
| Year |
Make |
Engine |
Fuel System |
| 1992-2006 |
Volvo Penta |
4.3L V6 (GL, GS, GSi) |
Carbureted |
| 1992-2006 |
Volvo Penta |
5.0L V8 (GL, Gi) |
Carbureted |
| 1992-2006 |
Volvo Penta |
5.7L V8 (GS, GSi) |
Carbureted |
Specifications
| Specification |
Value |
| Part Number (OEM) |
21608511 |
| Voltage |
12V DC |
| Pressure Range |
4-7 PSI |
| Flow Rate |
30+ GPH (Free Flow) |
| Inlet/Outlet |
5/16-inch or 3/8-inch Hose Barb |
| Polarity |
Negative Ground |
Signs Your Fuel Pump Needs Replacement
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Hard starting — engine cranks but takes excessive time to fire, especially after sitting
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Stalling under load — engine dies when you throttle up from idle
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No-start after winter storage — old fuel varnish seizes the pump internals
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Intermittent fuel delivery — engine surges or cuts out randomly on the water
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Audible pump failure — no clicking sound from the pump when the ignition is turned on
Installation Guide
Disconnect the battery before starting. Remove the old pump from its mounting bracket (typically on the port side of the engine near the fuel filter/separator). Transfer the bracket or use the included one. Connect the fuel lines — pay attention to flow direction (arrow on the pump body). Wire the red lead to ignition-switched 12V and the black lead to a clean ground. Prime the system by cycling the ignition 3-4 times before starting. Check all connections for leaks before heading out on the water.
Need the Complete Assembly?
This low pressure electric fuel pump is the pump unit inside the Volvo Penta electric fuel pump assembly (21608511 / 21545142) — the complete plug-and-play kit with mounting bracket, inlet/outlet fittings, and gasket. If you are replacing the whole fuel delivery unit, the complete assembly saves installation time and ships in one box.
Frequently Asked Questions
Q: Will this work on a Mercruiser 4.3L?
A: While Mercruiser and Volvo Penta use similar GM-based blocks, fuel pump specifications may differ. Verify your Mercruiser's required fuel pressure before purchasing. This pump is specifically spec'd for Volvo Penta applications.
Q: Can I use this for fuel injection (EFI/MPI) engines?
A: No! EFI systems require 35-60 PSI. This is a low-pressure pump (4-7 PSI) for carbureted engines only. Using it on an EFI engine will result in a no-start condition.
Q: Is this Coast Guard compliant for marine use?
A: This pump is designed for marine engine compartments and uses sealed, ignition-protected construction. Always verify compliance with your local marine safety regulations.
Q: Should I replace the fuel filter at the same time?
A: Yes — absolutely. A new pump paired with an old, clogged fuel filter will fail prematurely. Replace the water-separating fuel filter and any inline filters simultaneously.
Q: How long do these pumps typically last?
A: In marine applications with regular use and clean fuel, expect 5-8 years of reliable service. Ethanol-blended fuels and long storage periods shorten pump life — consider adding a fuel stabilizer for winter layup.
