Mercury – Quicksilver 823426A1 Carburetor Repair Kit (4-Barrel) | Rochester Quadra-Jet | MerCruiser GM Sterndrive & Inboard Engines | 823426A1

Overview

If your engine is running rough, idling unevenly, or burning more fuel than usual, it might be time to rebuild your carburetor. The Quicksilver 823426A1 Carburetor Repair Kit brings your Rochester 4-barrel Quadra-Jet carburetor back to factory condition. Designed for MerCruiser sterndrive and inboard engines built by General Motors (305, 350, 427, 454, and 502 CID) from 1969–1995, this OEM kit includes everything you need to restore smooth, efficient fuel delivery.

Each component is built to Mercury’s standards for fit, function, and durability — giving you reliable throttle response, easy starts, and better fuel economy once installed.

Key Features

• Purpose: Restores proper fuel delivery and smooth operation to your 4-barrel carburetor.
• Fitment: For Rochester 4-barrel Quadra-Jet carburetors on MerCruiser GM sterndrive and inboard engines (305–502 CID, 1969–1995).
• Kit Contents: Includes gaskets, seals, jet needles, clips, O-rings, float, and hardware for a complete rebuild.
• Performance: Eliminates stalling, rough idle, and poor fuel burn caused by worn carb parts.
• Ease of Install: All parts are precision-fit and ready to install with standard tools — detailed instructions in your service manual.

Engine & Boat Compatibility

• GM-based MerCruiser sterndrives and inboards: 4- & 6-cylinder inline engines, plus V6 and V8 models (305, 350, 427, 454, 502 CID)
• Common on classic sport boats, cruisers, and older inboard setups

Performance & Real-World Benefits

The 823426A1 rebuild kit restores crisp throttle response and reliable performance by renewing worn or clogged components in your carburetor. The gaskets and O-rings ensure tight sealing, while the jet needles and float restore proper fuel metering.

Whether you’re reviving an older boat or doing preventative maintenance, this kit helps your engine start easier, run smoother, and idle more consistently. It’s a complete refresh that can make an old carb feel new again.

Why Choose OEM

Mercury’s OEM carburetor kits are built to the exact specs of the original components. Aftermarket kits may look similar but often use lower-quality materials that don’t seal as well or wear out faster under marine conditions.

A genuine Quicksilver kit guarantees correct fit, consistent performance, and longer life — the same precision Mercury designed into your engine from day one.

FAQ

Q1: What carburetor does this kit fit?
A: It fits Rochester 4-barrel Quadra-Jet carburetors used on MerCruiser GM-based sterndrive and inboard engines (305–502 CID, 1969–1995).

Q2: What’s included in the kit?
A: Gaskets, seals, jet needles, clips, O-rings, float, and attaching hardware — all OEM parts.

Q3: Will this kit fix fuel leaks or poor idle?
A: Yes. Rebuilding your carb with new gaskets and jets restores proper sealing and fuel metering.

Q4: Can I install it myself?
A: Yes, if you’re comfortable with carburetor work. A Mercury service manual is recommended for setup and adjustment.

Q5: Why OEM over aftermarket?
A: OEM parts fit exactly right, resist ethanol wear, and are tested for durability in marine conditions.