3303-804766A05 Carburetor Fits Mercury Mariner (6 HP)

Product Overview

XR MARINE · CARBURETORS & REPAIR KITS

3303-804766A05 Carburetor Fits Mercury Mariner (6 HP)

This replacement carburetor is designed for matching Mercury and Mariner 6 HP 4-stroke outboard engines. It is supplied with a carburetor gasket referenced under 27-803508013 / 803508013 for mounting installation. In addition to direct 6 HP carburetor replacement, this unit is referenced for proposed 4 HP-to-6 HP and 5 HP-to-6 HP conversion applications; always verify your exact engine version and conversion requirements, as replacing the carburetor alone is not established as sufficient to guarantee 6 HP output.

Product Specifications

Key product details for identification and comparison.

Fitment

The 3303-804766A05 Carburetor from XR Marine fits Mercury and Mariner 6 HP 4-stroke outboard engines in the applications listed below.

Compare your engine identification plate and existing carburetor part number—including all prefixes and suffixes—before ordering. Because specific model designations, production years and serial-number boundaries are not specified in the general 6 HP fitment records, horsepower alone cannot confirm compatibility. For proposed 4 HP-to-6 HP or 5 HP-to-6 HP conversions, verify your exact engine configuration and all required conversion parts beforehand.

• Brand: Mercury | Power: 6 HP | Stroke: 4-Stroke | Note: Model, year, and serial number not specified.
  ✓ Fits
• Brand: Mariner | Power: 6 HP | Stroke: 4-Stroke | Note: Model, year, and serial number not specified.
  ✓ Fits

Fitment to Confirm

• Brand: Mercury / Mariner | Power: 4 HP / 5 HP (Proposed conversion to 6 HP) | Stroke: 4-Stroke | Restriction: Confirm the exact engine version and conversion requirements; changing the carburetor alone is not established as sufficient to guarantee 6 HP output.
  ! Check conditions

OEM & Part Number References

Use the complete reference number, including its suffix, when comparing parts. Reference numbers do not confirm that every version is interchangeable.

What's Included

Check the supplied components before planning your repair.

• Carburetor (Included)
• Carburetor Gasket — Quantity: 1 (Reference: 27-803508013)

Installation Guide

General installation overview. Follow the service manual for your exact engine and carburetor configuration. Fuel-system work requires the appropriate skills and precautions.

1. Preparation and Part Comparison: Ensure the engine is shut off and cool, disconnect the fuel supply and ignition source in accordance with your service manual, and work in a well-ventilated area away from open flames. Compare the new carburetor and the supplied 27-803508013 gasket against your original components—checking mounting flange orientation, throttle linkage connections, and fuel inlet placement before disassembly.
2. Removal and Mounting: Label or photograph existing fuel lines, vent hoses, and throttle or choke linkages to preserve their routing. Remove the old carburetor and thoroughly clean the mating surfaces without scoring the metal. Position the new sealing gasket and install the replacement carburetor following the tightening sequence and guidelines in your factory service manual, then reconnect all linkages and hoses securely.
3. Leak Inspection and Operational Check: Restore fuel supply and inspect all hose connections, bowl seams, and gasket surfaces for any signs of fuel seepage before starting. Verify that throttle and choke mechanisms move smoothly through their full range without binding. With proper cooling water supplied to the outboard, start the engine and perform any necessary idle adjustments according to your service manual; shut down immediately if leaks or abnormal operation occur.

Before You Order

A careful fitment check helps you choose the right part the first time.

• Match the full engine model designation on the identification plate.
• Verify your engine serial number against your official parts catalog, as specific year and serial-number boundaries are not listed in the general 6 HP fitment records.
• Compare the complete OEM reference number, including its suffix. Horsepower or appearance alone is not enough.
• Confirm the package contents and the quantity needed for your repair.
• Keep the carburetor reference numbers (3303-804766A05, 804766A04, 8M0053668, 8M0167271, 804766T03) distinct from the sealing gasket references (27-803508013 / 803508013).
• If ordering for a proposed 4 HP or 5 HP to 6 HP conversion, confirm the exact engine version and conversion requirements beforehand; changing the carburetor alone is not established as sufficient to guarantee 6 HP output.

Need help checking fitment? Have your engine identification details, the existing part number and clear photos ready when you contact XR Marine.

Why XR Marine

Frequently Asked Questions

Answers to common questions about this product and its application.