The Edelbrock 1409 Marine Series 600 CFM electric choke carburetor is a precisely tuned, quality-built carburetor that can handle the harsh abuse only a marine environment can inflict. Several characteristics make the 1409 Marine Series 600 CFM electric choke carburetor an outstanding marine performer. The first one is that metering rods are utilized to transition between circuits. The carburetor is unaffected by engine backfires, which means that there are no power valves to blow out, and the rods can be changed in seconds without carburetor removal or fuel draining. Secondly, the carburetor has the unique ability to "hold a tune", so once it is tuned, the carburetor stay's tuned. What this means to you is that compared to other carburetors, the performance re mains consistent and the calibration stays unchanged. The lightweight all-aluminum body features a two-piece body that is iridited and assembled with PTFE-coated shafts and pump arm for maximum protection. The simple tub-type bowls and rear-pivot floats all contribute to a carburetor that's reliable, user-friendly and is easily tunable for trouble-free operation.