750 CFM Ultra Double Pumper Marine Carburetor

Electric Choke Mechanical Secondaries

PART# 0-76750HBM

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The new Ultra Marine Double Pumper™ Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061–T6 billet aluminum. They weigh in at approximately 5 lbs. less than a comparable zinc carburetor. The new Ultra Marine Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; four vacuum ports for all necessary vacuum accessories; The new Ultra Double Pumpers are built to exceed the Coast Guard standards and are J1223 Marine Standard certified. So, if you are hitting the lake for an easy cruise or some high speed fun, these new performance carburetors will meet and exceed your performance demands!


  • Hard Core Gray™ w/ black anodized billet aluminum metering blocks/base plate. Casting is hard coat anodized for ultimate corrosion resistance
  • Ultra Double Pumpers feature an Optimized marine calibration that works out-of-the-box
  • Factory preset electric choke for easy startups
  • Mechanical secondaries for awesome performance
  • 4 corner idle allows you to precisely control your idle system
  • Built in, clear fuel level sight glass for easy, no mess fuel level adjustments
  • Aluminum construction for a 43% weight savings
  • 100% wet-flow tested by Holley technicians to assure it arrives ready to run!


Billet ColorBlack
BoosterDown Leg
Emission Code3
FinishHard Core Gray
Fuel InletDual
Marine Engine SizeUniversal
Primary Main Jet74
Primary Power Valve6.5
Primary Pump Nozzle Size28
Product TypeCarburetor
Secondary Main Jet84
Secondary Pump Nozzle Size31
Supercharged ApplicationNo
Throttle Bore1.688 inch
Vacuum Ports1 timed (spark) port, 2 full, and 1 PCV port
Part Number0-76750HBM

Service Parts


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.


    *Free Shipping & Handling only offered to the contiguous US on orders over $100.

    Some parts are not legal for use in California or other states with similar regulations.