Carburetor Assembly – Fits Mercury/Mariner 2-Stroke 70-90HP (Replaces 3301-9012A14)

Carburetor Assembly – Fits Mercury/Mariner 2-Stroke 70-90HP (Replaces 3301-9012A14)

This carburetor assembly is designed for Mercury and Mariner 2-stroke outboard motors from 70 to 90 HP manufactured between 1987 and 1989. It is engineered to meet or exceed OEM specifications for reliable performance.

This component is a direct replacement for Mercury OEM part numbers: 3301-9012A14, 3301-9012A24, 3301-9012A5, 3301-9012A17, and 3323-9012A14.

• Installation Method: Direct replacement
• Engine Compatibility: Designed for 3-cylinder engines
• Fuel Type: Gasoline (for 2-stroke applications)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

1 x Carburetor Assembly (3301-9012A14)

Installation Guide

1. Safety First: Disconnect the battery and ensure the engine is cool. Shut off the fuel supply valve.
2. Access Carburetor: Remove the engine cowl to access the carburetor assembly.
3. Document Connections: Take photos or label the fuel lines, throttle linkages, and any other connections to the carburetor before removal.
4. Disconnect Lines: Carefully disconnect all fuel lines, vacuum hoses, and electrical connectors attached to the unit.
5. Remove Linkages: Detach the throttle and choke linkages. Be careful not to bend or damage them.
6. Unbolt Carburetor: Remove the nuts or bolts securing the carburetor to the intake manifold.
7. Remove Old Unit: Gently pull the old carburetor and any associated gaskets away from the engine.
8. Clean Surface: Thoroughly clean the mounting surface on the intake manifold, removing any old gasket material or debris.
9. Install New Carburetor: Mount the new carburetor assembly, ensuring any new gaskets are correctly aligned. Hand-tighten the mounting hardware.
10. Secure and Reconnect: Torque the mounting bolts to the manufacturer's specification. Re-attach all linkages, fuel lines, hoses, and connectors.
11. Final Checks: Turn the fuel supply back on and check for any leaks. Reconnect the battery.
12. Test: Start the engine in a well-ventilated area. You may need to adjust the idle screw to achieve a smooth idle speed.

Troubleshooting & FAQ

Q: How do I confirm this carburetor will fit my engine?

A: This part is specifically for 1987-1989 Mercury/Mariner 2-stroke outboards with 70, 75, 80, or 90 HP ratings. The best way to guarantee fitment is to match your original part's number to the cross-reference list (e.g., 3301-9012A14) and compare it visually to our product images.

Q: What are common symptoms of a bad carburetor?

A: Signs of a failing carburetor include difficulty starting, rough or unstable idling, engine stalling at low speeds, poor acceleration or inability to throttle up, and excessive black smoke from the exhaust, which indicates a rich fuel mixture.

Q: Does this assembly include a new gasket?

A: This listing is for the carburetor assembly itself. Please review the "Package Contents" section for a complete list of included items. Gaskets may be sold separately.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.