PRW Industries 4245471 Rochester Quadrajet Marine Carburetor 800 CFM Electric Choke Spread Bore

The PRW Industries 4245471 is a new Rochester Quadrajet (Q-Jet) four-barrel marine carburetor rated at 800 CFM, purpose-built for GM marine applications. Featuring a spread bore design and vacuum-actuated secondaries, this carburetor delivers reliable fuel delivery and strong throttle response for inboard marine engines in the 350–455 cubic inch range.

Unlike rebuilt or remanufactured units, this carburetor is built with all-new components and is locally assembled and run-tested in the USA. It ships complete with MerCruiser-compatible marine throttle linkage and meets U.S. Coast Guard requirements, making it a compliant and direct-fit upgrade for most GM-based inboard and stern-drive marine powerplants.

Key Features:

• 800 CFM four-barrel spread bore Quadrajet design
• All-new construction — not rebuilt or remanufactured
• One-wire electric choke for easy hookup
• Industry-first lean/rich adjustment allowing up to ±15% main circuit adjustment for precise tuning
• Includes MerCruiser marine throttle linkage
• Meets U.S. Coast Guard requirements for marine use
• Multiple vacuum ports included
• Polished finish
• Assembled and run-tested in the USA; gaskets, metering rods, jets, and air bleeds made in the USA
• 49-state legal

Fuel System Note: These carburetors have an ideal target fuel pressure of 5.5–6 PSI. Fuel pressure above the recommended setting may lead to drivability and tuning issues. Always verify pressure with a gauge before installation.

Backed by PRW's 6-month warranty on carburetors. For technical support, contact PRW's Tech Hotline at 888-377-9779, Monday–Friday, 7am–4pm PST.