Description
3.0L (181ci) 4-Cylinder Marine Carburetor — Direct OEM Replacement
The 3310-864940A01 Marine Carburetor for Mercruiser 2 Barrel 3.0L 4 CYL with A Long Linkage (Yellow) is a precision-engineered 2-barrel marine carburetor designed as a direct bolt-on replacement for Mercruiser sterndrive engines. Built with marine-grade aluminum alloy and featuring an electric choke, this carburetor delivers reliable cold starts, smooth idle, and consistent fuel delivery for worry-free boating.
Key Features
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Marine-Grade Aluminum Construction — Corrosion-resistant alloy body withstands saltwater and freshwater environments; significantly more durable than standard automotive carburetors
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Electric Choke System — Automatic electric choke ensures reliable cold starts without manual priming; wired for simple 12V ignition connection
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Precision Tuned for Marine Use — Calibrated for the unique fuel demands of marine engines operating under sustained load at varying RPMs
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Direct Bolt-On Replacement — Exact OEM fitment with no modifications required; matches original mounting bolt pattern and linkage configuration
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Pre-Set Float Level — Factory-calibrated float height eliminates the need for initial adjustment in most installations
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2-Barrel Design — Balanced primary and secondary venturi for smooth acceleration and efficient cruising fuel economy
Fitment & Compatibility
| Engine |
Year Range |
Application |
| 3.0L (181ci) 4-Cylinder |
1990-2015 |
Mercruiser Sterndrive (2-Barrel Mercarb) |
| 3.0L (181ci) 4-Cylinder |
1990-2015 |
Mercruiser Alpha One / Gen II |
Technical Specifications
| Specification |
Detail |
| Barrel Configuration |
2-Barrel (Primary + Secondary) |
| Choke Type |
Electric (12V Automatic) |
| Body Material |
Marine-Grade Aluminum Alloy |
| Base Bolt Pattern |
3-3/4 x 2 inches |
| Fuel Type |
Gasoline (87+ Octane) |
| OEM Part Number |
3310-864940A01 |
| Finish |
Yellow Anodized |
Installation Tips
- Always replace the base gasket when installing a new carburetor
- Verify fuel line compatibility — marine applications require USCG-approved fuel hose
- Check throttle linkage alignment before final torque
- Prime the fuel system before first start to avoid extended cranking
- Allow engine to reach operating temperature before final idle adjustment
Why Choose iFJF Marine Carburetors
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Cost-Effective Alternative — Save up to 60% vs OEM dealer pricing without sacrificing quality
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Rigorous Testing — Each unit is flow-tested and calibrated before shipping
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Marine-Specific Engineering — Designed for the sustained high-load operation unique to marine applications, not adapted from automotive carbs
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Fast Shipping — In-stock in our US warehouse for quick delivery
Frequently Asked Questions
Q: Does this carburetor come with a base gasket?
A: The carburetor includes the base gasket. We recommend having a spare gasket on hand for installation, available separately.
Q: Is this a direct replacement for OEM 3310-864940A01?
A: Yes. This carburetor is an exact bolt-on replacement with matching bolt pattern, linkage configuration, and fuel inlet placement. No modifications are required for installation.
Q: How do I wire the electric choke?
A: Connect the choke wire to a 12V ignition-switched source (key-on power). The choke heating element draws minimal current and automatically opens as it warms up.
Q: Will this work with Thunderbolt IV/V ignition systems?
A: Yes. The carburetor is compatible with all Mercruiser ignition systems including Thunderbolt IV, Thunderbolt V, and EST systems.
Q: Does it come pre-tuned / pre-calibrated?
A: The carburetor is factory flow-tested and pre-set for standard operating parameters. Minor idle mixture and idle speed adjustments may be needed based on your specific engine and altitude.
