Fuel Pump Gasket – Fits Johnson/Evinrude/OMC Outboards (Replaces 303615)

$4.92 $7.00

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Fuel Pump Gasket – Fits Johnson/Evinrude/OMC Outboards (Replaces 303615) is backordered and will ship as soon as it is back in stock.

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Product Details

This is a replacement Fuel Pump Gasket – Fits Johnson/Evinrude/OMC Outboards (Replaces 303615), designed for mounting the fuel pump to the engine block on various outboard motors. Built to original equipment manufacturer (OEM) specifications, it ensures a reliable seal.

It serves as a direct interchange for OMC parts 303615, 0303615, and 777737, as well as several aftermarket equivalents.

Installation Location: Mounts between the fuel pump and the engine block.
Material: Constructed from durable, fuel-resistant materials to OEM specifications.
Function: Creates a secure seal to prevent fuel leaks and maintain pressure.

Part Number Matrix

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

Brand	Part Number
OMC	303615 / 0303615
OMC	777737
Sierra	18-0850
Sierra	18-0850-9
Mallory	9-60436
GLM	34080

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Johnson/Evinrude/OMC Applications: This gasket is used on a variety of Johnson and Evinrude Outboard Engines for mounting fuel pumps. Comprehensive application data by specific model, year, and horsepower is limited; always verify compatibility by part number.

Technical Specs

Product Type: Fuel Pump Mounting Gasket
Installation: Between fuel pump and engine block
Fuel Type: Compatible with gasoline
Material: OEM specification
Dimensions: 1.13 in × 5.13 in × 4.0 in
Weight: 45.4 g (1.6 oz)
OEM Part Number: 303615 / 0303615
UPC: 745419040444
Warranty: Standard manufacturer warranty

What’s in the Box

1 × Fuel Pump Mounting Gasket (303615)

Installation Notes

Disconnect the battery and relieve any pressure from the fuel system for safety.
Carefully disconnect the fuel lines from the fuel pump.
Unbolt and remove the fuel pump from the engine block.
Remove the old gasket and thoroughly clean both mating surfaces to ensure they are free of debris and old gasket material.
Position the new gasket correctly on the engine block.
Reinstall the fuel pump and tighten the mounting bolts to the manufacturer's specified torque.
Reconnect the fuel lines securely.
Reconnect the battery, prime the fuel system, and check thoroughly for any leaks before starting the engine.

Troubleshooting & FAQ

How do I confirm this gasket fits my specific outboard model?

The best method is to match your existing part number to one listed in the Part Number Matrix. While this gasket fits many Johnson/Evinrude/OMC engines, specific model and year lists are not available, so part number verification is critical.

What are the signs of a failing fuel pump gasket?

Common symptoms include visible fuel leakage around the fuel pump base, a strong gasoline odor, poor engine performance, stalling, or difficulty starting. These signs indicate the seal is compromised and should be replaced immediately.

Is this the only part I need to replace my fuel pump?

This listing is for the mounting gasket only. Depending on the reason for your repair, you may also need a new fuel pump, fuel lines, or mounting hardware. This gasket is essential when replacing or reinstalling the fuel pump.

Is this an OEM or aftermarket part?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and reliability.

How fast is shipping?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most regions. Expedited options, if available for your location, will appear at checkout.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their 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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