3301-9012A14 Carburetor Assembly for Mercury Mariner | JLM Marine

Carburetor Assembly – Fits Mercury Mariner 2-Stroke 70-90 HP Outboards (1987-1989)

This carburetor assembly is designed for Mercury Mariner 2-stroke outboard motors from 1987 to 1989, compatible with 70 HP, 75 HP, 80 HP, and 90 HP models. Engineered to deliver reliable fuel mixing and engine performance, this replacement ensures your outboard runs smoothly on the water.

Direct Replacement: OEM part number 3301-9012A14. This aftermarket carburetor is built to OEM specifications, providing a cost-effective alternative without sacrificing quality or performance.

• Includes carburetor with gasket (27-151724) for complete installation readiness
• Compatible with Mercury Mariner 2-stroke outboards in the 70-90 HP range
• Precision-engineered for optimal fuel-air mixture and throttle response

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 × Carburetor Assembly
• 1 × Gasket (Part No. 27-151724)

Installation Guide

1. Disconnect the fuel line from the old carburetor and ensure the fuel valve is closed to prevent spillage.
2. Remove the air silencer cover and air intake components to access the carburetor mounting.
3. Disconnect the throttle and choke linkages carefully, noting their positions for reassembly.
4. Unbolt the old carburetor from the intake manifold and remove it along with the old gasket.
5. Clean the mounting surface on the intake manifold thoroughly to ensure a proper seal.
6. Place the new gasket (27-151724) onto the intake manifold, aligning all bolt holes.
7. Position the new carburetor assembly onto the gasket and hand-tighten the mounting bolts.
8. Torque the mounting bolts to manufacturer specifications in a cross-pattern to ensure even seating.
9. Reconnect the throttle and choke linkages, adjusting them to ensure smooth operation.
10. Reattach the fuel line securely and check for any signs of leaks.
11. Reinstall the air intake components and silencer cover.
12. Start the engine and allow it to warm up; adjust the idle mixture and speed as needed for optimal performance.

Troubleshooting & FAQ

Q: How do I confirm this carburetor fits my Mercury outboard?
A: Check the compatibility table above to verify your engine's HP rating and year (1987-1989). Cross-reference your existing carburetor's OEM part number (3301-9012A14) to ensure a match.

Q: What are the signs that my carburetor needs replacement?
A: Common symptoms include rough idling, difficulty starting, poor acceleration, excessive fuel consumption, or black smoke from the exhaust. If cleaning doesn't resolve these issues, replacement is recommended.

Q: Does this carburetor come with a gasket?
A: Yes, this package includes the carburetor assembly and gasket (part number 27-151724) for complete installation.

Q: How often should I replace or service the carburetor?
A: Regular cleaning is recommended every season or every 100 hours of operation. Replace the carburetor if you experience persistent performance issues, internal wear, or damage that cleaning cannot fix.

Q: Is this an OEM or aftermarket carburetor?
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.