Automotive Parts and Accessories: Holley 0-4781C Model 4150 Double Pumper 850 CFM Square Bore 4-Barrel Mechanical Secondary Manual Choke New Carburetor - Holley

Automotive Parts and Accessories: Holley 0-4781S Model 4150 Double Pumper 850 CFM Square Bore 4-Barrel Mechanical Secondary Manual Choke New Carburetor - Holley

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Automotive Parts and Accessories: AED 4150 Ultimate Holley Double Pumper Carburetor Kit - AED

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850 Holley Double Pumper Popular Q&A

Q: Has a dual high rise intake with a single 850 holley double pumpe...
A: Edit your question- need to know your current WOT rpms, and the jet model. So, 4 days later, and the 2 vital bits of info are still missing. This makes it impos... Read More »

Q: How to Tune a Holley Double Pumper.
A: 1. Check the clearance between the pump diaphragm arm and the adjustment screw assembly found on the forward mounted fuel bowl. Ensure the arm is slightly touch... Read More »

Q: How to Tune a 750 Double Pumper Holley Carburetor.
A: 1. Remove the air cleaner. Start the engine and allow it to warm up to operating temperature. Shut the engine off. Remove the passenger side fuel sight plugs on... Read More »

Q: How to adjust a 650 Holley double pumper float?
A: On the right side of the carb their are two screws one on the front bowl and one on the back bowl. Start the engine let idle take one screw out at a time and on... Read More »

Q: What does a holley double pumper carbeurator do?
A: Read More »