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3301-9012A15 Carburetor Fits Mercury Mariner (70 HP, 75 HP, 80 HP, 90 HP)

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Send us the product link, your engine brand, full model and serial number, and the reference on your original part. Include the year if known.

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Product Overview

XR MARINE · CARBURETORS & REPAIR KITS

3301-9012A15 Carburetor Fits Mercury Mariner (70 HP, 75 HP, 80 HP, 90 HP)

This product is a replacement carburetor configured specifically for the center mounting position on listed 1987–1989 Mercury Mariner 2-stroke outboard engines (70 HP, 75 HP, 80 HP, and 90 HP). It is supplied as a carburetor unit rather than a carburetor repair kit. Before ordering, confirm that your engine requires the center-position carburetor and match your complete OEM reference number, including its suffix, against the references listed on this page.

Free shipping on all orders. Lifetime warranty for product quality defects. Normal wear and tear excluded.

Product Specifications

Key product details for identification and comparison.

Product Type Carburetor (Center Position)
Brand XR Marine
Carburetor Position Center
Primary OEM Reference 3301-9012A15
Additional OEM References 3301-9012A25, 3301-9012A72, 3301-9012A 6, 3301-9012A18
Target Engine Brand Mercury Mariner
Engine Configuration 2-Stroke Outboard
Listed Horsepower Applications 70 HP, 75 HP, 80 HP, 90 HP

Fitment

The 3301-9012A15 carburetor from XR Marine fits Mercury Mariner 70 HP, 75 HP, 80 HP, and 90 HP 2-stroke outboard engines in the model-year applications listed below when used in the center carburetor position.

Verify the engine details on your identification plate against each individual year entry below, compare the complete OEM part number including its suffix, and confirm that your repair requires the center-position carburetor. Horsepower alone cannot confirm fitment.

  • Brand: Mercury Mariner | Power: 70 HP | Year: 1987 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 70 HP | Year: 1988 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 70 HP | Year: 1989 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 75 HP | Year: 1987 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 75 HP | Year: 1988 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 75 HP | Year: 1989 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 80 HP | Year: 1987 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 80 HP | Year: 1988 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 80 HP | Year: 1989 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 90 HP | Year: 1987 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 90 HP | Year: 1988 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! Check conditions
  • Brand: Mercury Mariner | Power: 90 HP | Year: 1989 | Stroke: 2-Stroke | Engine Type: Outboard | Restriction: Center-position carburetor
    ! 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.

Reference Brand Part Number Reference
Mercury Mariner 3301-9012A15 (Center Position Reference)
Mercury Mariner 3301-9012A25
Mercury Mariner 3301-9012A72
Mercury Mariner 3301-9012A 6
Mercury Mariner 3301-9012A18

What's Included

Check the supplied components before planning your repair.

  • Center-position Carburetor (OEM Reference: 3301-9012A15)

Contact XR Marine to confirm the supplied contents before ordering.

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 Position Verification: Ensure the engine is shut off and cool, disconnect the ignition and battery as directed by your service manual, and isolate the fuel supply in a well-ventilated area away from ignition sources. Before removing any components, verify that the carburetor being replaced is in the center mounting position and compare the existing unit's casting numbers, linkage layout, and fuel connections with the replacement carburetor.
  2. Removal and Center Carburetor Installation: Document the routing of all fuel hoses, synchronization linkages, and mounting hardware connected to the center carburetor. Remove the existing center carburetor according to the factory service manual procedures, inspect the mounting surfaces for cleanliness, and install the replacement carburetor using appropriate gaskets and the tightening sequence specified in your manual.
  3. Linkage Check, Fuel Inspection, and Test Run: Reconnect the throttle linkages and fuel lines, then verify that the throttle plates open and close smoothly without binding across all carburetors. Prime the fuel system to check carefully for any fuel leaks before starting. Only test-run the outboard with a proper cooling water supply connected, and perform any synchronization or idle adjustments required by your service manual. Shut the engine down immediately if leaks, sticking linkages, 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.
  • Check the individual year entry and any serial-number or version restrictions.
  • 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.
  • Verify the mounting location on your outboard: this carburetor is specifically for the center position on listed 1987–1989 2-stroke models.
  • Confirm that you need a complete carburetor unit rather than a carburetor repair kit.

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

Ask XR Marine About Fitment

Why XR Marine

Carburetors are our focus. Fitment comes first.

XR Marine specializes in marine carburetors, carburetor repair kits and the related parts needed for these repairs. We keep our focus on this product line so that product information stays centered on the details that matter: engine applications, complete part-number references and what is included.

Use our individual fitment entries and part references to compare your application, then contact XR Marine if you need help before ordering.

Shipping

Free shipping on all orders. No minimum order value.

For questions about delivery to your destination or delivery timing, contact XR Marine before placing your order.

Contact XR Marine About Shipping

Lifetime Warranty

XR Marine provides lifetime warranty coverage for product quality defects. Normal wear and tear is excluded.

  • Covered: product quality defects.
  • Not covered: normal wear and tear.

Contact XR Marine for warranty assistance. Having your order details and a description of the issue available can help us understand your request.

Contact XR Marine About Warranty

Frequently Asked Questions

Answers to common questions about this product and its application.

Is this product a complete carburetor or a carburetor repair kit?

This product is a replacement center-position carburetor, not a carburetor repair kit. If you need to confirm the exact components supplied in the box, please contact XR Marine before placing your order.

Can I use this carburetor in the top or bottom position on my outboard?

This unit is specified for the center carburetor position on compatible 1987–1989 Mercury Mariner 70 HP, 75 HP, 80 HP, and 90 HP 2-stroke outboards. Multi-carburetor outboards often use different linkages, fittings, or jetting by position, so verify that you are replacing the center carburetor and matching the complete OEM reference number.

Why is it important to match the suffix on OEM reference numbers like 3301-9012A15?

On Mercury Mariner carburetor numbers (such as 3301-9012A15, 3301-9012A25, 3301-9012A72, 3301-9012A 6, and 3301-9012A18), the suffix identifies specific configurations or revisions. Always compare the full number including its suffix against your existing carburetor and official parts catalog rather than matching the base number or horsepower alone.

How do I confirm if this fits my 70 HP, 75 HP, 80 HP, or 90 HP Mercury Mariner outboard?

Check that your engine is a 2-stroke outboard from the listed model years (1987, 1988, or 1989), verify that you need the center-position carburetor, and match your original part number against the references on this page. If your engine identification plate details or serial number leave any doubt, contact XR Marine with your engine details and photos of your existing part.

Does the carburetor require synchronization or adjustment during installation?

When replacing a center carburetor on a multi-carburetor 2-stroke outboard, you should follow the factory service manual for your exact engine to check throttle linkage synchronization, fuel connections, and idle settings with a proper cooling water supply connected.

What shipping and warranty coverage apply to this carburetor?

All orders include free shipping with no minimum order value. XR Marine also provides a lifetime warranty covering product quality defects, with normal wear and tear excluded.

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