Fuel Pump Plug Connector – Fits Volvo Penta 4.3L 5.0L 5.7L 7.4L 8.2L (Replaces 3858261, 3857650)

Product Details

This Fuel Pump Plug Connector is engineered for Volvo Penta high-pressure fuel injection systems across 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L engines. Compatible with multiport fuel injection (MFI) applications from 1993 through 2001, this connector ensures reliable electrical contact for fuel pump operation on OMC and Volvo Penta marine engines.

Direct replacement for OEM part numbers 3858261, 3857650, 3857986, 3857985, 3854620, 3850810, 3850809, 986865, 988037, 3855958, 3854280, 3858714, and Mercury Marine 805656A2.

• Precision-molded connector housing for secure fit and moisture resistance
• Compatible with high-pressure fuel pump circuits on MFI systems
• Drop-in replacement for multiple OMC, Volvo Penta, and Mercury Marine references

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Connector Type

Fuel Pump Electrical Plug

Application

High-pressure fuel injection systems (MFI)

Compatible Fuel Systems

Multiport Fuel Injection (MFI)

Fitment

Volvo Penta 4.3L, 5.0L, 5.7L, 7.4L, 8.2L; OMC 302, 350, 351, 454, 502

What's in the Box

• 1 × Fuel Pump Plug Connector (as pictured)

Installation Notes

1. Disconnect the battery negative terminal and relieve fuel system pressure before beginning work.
2. Locate the fuel pump assembly and identify the existing electrical connector.
3. Carefully disconnect the old plug, noting wire orientation and terminal positions.
4. Inspect connector terminals and wiring for corrosion, damage, or fraying; clean or repair as needed.
5. Align the new connector housing with the fuel pump terminals, ensuring correct polarity.
6. Press the connector firmly into place until it clicks or locks securely.
7. Verify that all electrical contacts are fully seated and that no pins are bent.
8. Reconnect the battery and cycle the ignition to prime the fuel system; check for warning lights or fault codes.
9. Start the engine and confirm smooth operation with no fuel delivery issues.

Troubleshooting & FAQ

How do I confirm this connector fits my fuel pump?

Cross-reference the OEM part number on your existing connector with the interchange list above. Also compare the connector pin count, terminal layout, and mounting tab shape with product photos.

Can I use this on carbureted engines?

No. This connector is designed exclusively for high-pressure electric fuel pumps used in multiport fuel injection (MFI) systems on Volvo Penta and OMC engines from the 1990s–2000s.

What causes fuel pump connectors to fail?

Common causes include heat exposure near the fuel pump, moisture ingress leading to corrosion, vibration stress, and poor electrical contact over time. Intermittent starting or loss of fuel pressure are typical symptoms.

Is this connector waterproof or sealed?

The connector housing is moisture-resistant but not fully submersible. Ensure a tight fit and avoid submerging the connection point; apply dielectric grease to terminals if operating in high-moisture environments.

Do I need two connectors for some engines?

Yes. The 1994 Volvo Penta 302 5.0L and 351 5.8L models use dual high-pressure fuel pumps, requiring two connectors per engine. Verify your configuration before ordering.

Will this work with Mercury Marine fuel pumps?

This connector cross-references to Mercury Marine 805656A2, making it compatible with select Mercury applications that use the same connector design. Confirm fitment by matching part numbers and connector geometry.

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 against 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.