Quick Fuel M-Series carburetors launch high performance for your watercraft. QFT marine performance carburetors are specifically engineered for the positive and smooth fuel delivery that's vital to your power boat. Quick Fuel 850 M-Series carburetors all feature billet metering blocks for exceptional strength, interchangeable air bleeds and restrictions for fine tuning, and Teflon® coated throttle shafts and bearings for smooth throttle response. Plus, they offer aluminum fuel bowls with integral sight glass windows, marine J-style vent tubes, and QuickLink secondary linkage for fast and easy changes in throttle opening rates. QFT applies a protective coating to the main carb body and fuel bowls to prevent corrosion in harsh marine environments. They are available in several cfm models, as well as a couple of special models calibrated for Roots-style 2 x 4 supercharged engines and large-displacement engines. Quick Fuel M-Series marine carburetors are hand-assembled and run-tested on real engines for precise fuel delivery and ultimate precision on the water.