XIAORENWU Marine Carburetor for MerCruiser 3.0L/2.5L 2-Barrel — Black, Electric Choke Kit

XIAORENWU's 2-barrel marine carburetor is a direct replacement for MerCruiser 3.0L and many 2.5L 4-cylinder engines, supplied as a full installation kit with electric choke and long linkage.

Whether rebuilding an older sterndrive or swapping a worn Mercarb, this XIAORENWU unit is built to match the 3-3/4" x 2" base bolt pattern used on select MerCruiser 3.0 and 2.5 4-cylinder models. It arrives coated for marine corrosion resistance and includes linkage, gaskets, jets and hardware so you can replace the carburetor without sourcing extra parts. Before ordering, confirm your carburetor's bolt pattern, choke type and throttle linkage to ensure compatibility.

How does this carburetor improve starting and acceleration?

The design upgrades address common cold-start and bogging issues by optimizing choke flap clearance and sealing the base plate to reduce vacuum leaks. Improved jet selection and included shims let you fine-tune fuel delivery for smoother throttle response across RPM ranges.

• Optimized choke flaps with controlled air gaps for more reliable cold starts.
• Four jets plus a shim included to help tune fuel mixture without extra parts.
• Base plate sealing reduces vacuum leaks that cause hesitation or bogging.

Which engines and part numbers is this unit compatible with?

This carburetor is intended for MerCruiser 3.0L (1998–2004), MerCruiser 3.0LX (1990–1997) and Alpha 1 (1993–1995) engines that use the 2-barrel Mercarb with 3-3/4" x 2" bolt pattern. It replaces common part numbers used on these models, but it does not fit smaller 3-1/4" base carbs, Rochester units, or most 4.3L V6 carburetors or TKS systems.

• Fits MerCruiser 3.0L and many 2.5L 4-cylinder models with 3-3/4" x 2" bolt pattern.
• Direct replacement for part numbers: 3310-864940A01, 3310864940a01, 864940A01, 8M0045397.
• Not compatible with 3-1/4" small-base carburetors, Rochester, TKS, or most 4.3L V6 carbs.

What hardware and components are included in the kit?

The complete package is meant to minimize the parts you need to source separately: the carb arrives with a short linkage installed and a long linkage in the box, plus gaskets, jets, a throttle arm, and other installation hardware. That makes it easier to swap into boats that used the same base pattern and throttle arrangement.

• One 3.0L two-barrel marine carburetor with short linkage installed and an extra long linkage.
• Three gaskets, brass fitting, replacement throttle arm, air filter bolt, four jets, shim, and seven nuts.
• Marine-grade black coating and SAE J1223 construction for corrosion resistance.

How durable is this carb for saltwater use and maintenance considerations?

Built with a marine-grade protective finish and attention to seal design, the carburetor resists rust and oxidation that commonly shorten component life in salty environments. Routine maintenance—periodic inspection of gaskets, jets and choke—will help maintain performance and extend service life.

• Black marine coating reduces corrosion from saltwater exposure.
• Designed to limit base-plate vacuum leaks that accelerate wear and poor performance.
• Replaceable jets and included hardware simplify mid-season servicing.

Who is this for: This XIAORENWU carburetor kit is aimed at boat owners and marine mechanics replacing a worn or damaged MerCruiser 2-barrel carb on 3.0L/2.5L 4-cylinder engines with the 3-3/4" x 2" bolt pattern. It's ideal for DIYers who want a ready-to-install replacement with needed gaskets and jets included, and for service shops that need a corrosion-resistant aftermarket option to restore reliable starting and throttle response. Remember to confirm your engine's original carburetor model, bolt pattern and choke arrangement before purchase to avoid fitment issues.