Application: Replacement for Mercruiser Stern Drive, Mercury Marine,3.0L ALPHA ONE - 3.0L GM 181 I/L4, This Mercruiser Carburetor will work on most 4 cylinder engines 2.5 and 3.0L originally equipped with the 2 barrel Mercarb Replace Part Number: 3310-864940A01; 8M0045397; Marine Carburetor for Mercruiser 3.0 Carburetor Specification: Base Bolt Pattern is 3 3/4 X 2 inches, Mercruiser 2.5L 3.0L 4 cylinder originally equipped with the “small base” 3 1/4 X 2 inches will NOT FIT this 2 barrel carburetor Mercruiser 3.0 Carb. Please check the compatibility according to your engine size, serial number, original carburetor model, bolt pattern, and throttle linkage before purchase this 3.0 mercruiser carburetor, with Electric Choke and Side Fuel Inlet; with Short Linkage installed and the long Linkage in the box, Jets pre-installed size is #70.9, The 4 jets in the figure are used for custom purpose Package: 1x 3.0 mercruiser carburetor with Short Linkage installed , also come with one set accessories as shown in the picture (including long linkage kits) Advantage: New premium quality Marine carburetor, this mercruiser 2 barrel carburetor is an improved version of the original, we have fixed all possible problems, helping your boat run at peak performance. Excellent compatibility, Completed tested before shipment, good choice to replace your defective carb assembly