condgreemee 2-Barrel Marine Carburetor for Mercruiser 2.5L/3.0L — Electric Choke, Short Linkage

condgreemee's new 2-barrel marine carburetor is a direct-replacement electric-choke unit engineered to fit most Mercruiser 2.5L and 3.0L 4-cylinder sterndrive engines.

This carburetor arrives ready to install and replaces Mercruiser OE numbers 3310-864940A01 and 8M0045397, offering a factory-style base bolt pattern and preinstalled jets for straightforward swap-ins. Built as a brand-new assembly, it includes an electric choke, side fuel inlet and a short linkage installed, while extra jets and a long linkage are provided for custom tuning. The base bolt pattern is 3 3/4 x 2 inches — verify this against your current carburetor before ordering to ensure proper fit.

Will this carburetor fit my Mercruiser 2.5L or 3.0L engine?

It’s designed as a direct replacement for many 2-barrel Mercruiser 2.5L and 3.0L 4-cylinder carbureted engines and matches common OE bolt patterns. Confirming the base bolt pattern and overall appearance against your existing carb prevents compatibility problems.

• Fits most Mercruiser stern drive and Mercury Marine 2.5L/3.0L 4-cyl engines
• Base bolt pattern: 3 3/4 x 2 inches — not compatible with 3.25-inch patterns
• Replaces part numbers: 3310-864940A01, 3310864940A01, 8M0045397
• Side fuel inlet and electric choke match many factory setups

What comes installed and what extras are included?

The carburetor ships with key components preinstalled so you can swap it in quickly, plus spare jets and an alternate linkage for tuning or special setups. Installation instructions are not included, so plan to use service manuals or online guides, or have a professional perform the final tune.

• Preinstalled jets sized #70.9 for baseline tuning
• Extra jets (#68 and #78) included for customization
• Short linkage installed; long linkage supplied but not installed
• Electric choke and side fuel inlet factory-fitted

How should I verify this carburetor before purchase?

Careful visual comparison of your current carburetor with product photos is strongly recommended to avoid ordering the wrong pattern or style. Check bolt pattern, choke type, fuel inlet location and general shape from multiple angles.

• Compare front, back and both sides of your existing carb to the listing photos
• Confirm your carburetor is a 2-barrel, side-fuel-inlet unit with electric choke
• Measure the base bolt pattern to ensure it’s 3 3/4 x 2 inches
• Don’t buy if your carb has a 3.25-inch base or a different choke/fuel arrangement

What installation and tuning guidance should I expect?

This is a bolt-on replacement physical fit, but final installation and fuel/air tuning usually require mechanical experience and adjustment. If you’re unfamiliar with carb tuning, a professional technician or detailed video guide will help ensure correct operation and longevity.

• No printed instructions included; search online installation videos or service manuals
• Professional installation and tuning recommended for best performance
• Use the included extra jets to adjust fuel metering if needed
• Test for leaks and correct choke operation after installation

Who is this for: boat owners, marine mechanics and DIY enthusiasts who need a brand-new, economical aftermarket replacement for Mercruiser 2-barrel 2.5L or 3.0L 4-cylinder carburetors. It’s ideal if you want a ready-to-install electric-choke unit with baseline jets and spare parts for tuning, provided you confirm the 3 3/4 x 2 inch base bolt pattern and side-fuel inlet arrangement before purchase. If you prefer plug-and-play guaranteed fitment for nonstandard or uncommon base patterns, consult a mechanic or your dealer first.