3303-812647T1 Carburetor

Product Overview

XR MARINE · CARBURETORS & REPAIR KITS

3303-812647T1 Carburetor

This product is a replacement carburetor listed with primary OEM reference numbers 3303-812647T1 and 812648T. It is a complete carburetor unit intended for a carburetor replacement task, not a carburetor repair kit.

Use your engine’s exact model and serial number along with the parts catalog to identify the required carburetor before ordering. Even when a carburetor appears in a shared 4/5 HP catalog, it may still be specified for a particular horsepower version.

Product Specifications

Key product details for identification and comparison.

Fitment

The 3303-812647T1 Carburetor from XR Marine requires application verification against your engine model, serial number and parts catalog before ordering.

Match the full engine model designation and serial number on your identification plate, compare the complete OEM reference number including its suffix, and check horsepower-specific notes in the parts catalog. A carburetor shown in a shared 4/5 HP catalog may still be specified for a particular horsepower version, so horsepower or brand name alone cannot confirm fitment.

Fitment to Confirm

• Brand: Mercury Mariner | Application Note: Company application label only; specific model compatibility unconfirmed (Application brand scope: Mercury)
  ? Confirm fitment

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.

• Included Component: Carburetor.

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. Verify identification and prepare the engine: Confirm the engine model, serial number and complete carburetor reference number against your parts catalog before starting. Shut off the engine, allow it to cool completely, disconnect the ignition source and isolate the fuel supply in a well-ventilated work area away from open flames or sparks.
2. Document connections and compare the carburetor: Label or photograph fuel lines, throttle linkages, choke connections and mounting hardware orientations before removal. Remove the existing carburetor according to the service manual and compare its mounting flange, linkage points and fuel inlet directly against the replacement carburetor.
3. Install, inspect for leaks and check operation: Mount the carburetor and reconnect the linkages and fuel line following the procedures in your service manual. Verify that the throttle and choke move smoothly without binding. Restore the fuel supply to inspect thoroughly for any fuel leaks, then test-run the engine only with the proper cooling water supply connected and perform any manual-specified adjustments. Stop immediately if any leak or abnormal operation occurs.

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.
• Check your engine's exact serial-number range and version details in the official parts catalog, as specific model compatibility is unconfirmed on this listing.
• 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.
• Check horsepower-specific notes in the parts catalog; a carburetor shown in a shared 4/5 HP catalog may still be specified for a particular horsepower version.

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.