Rochester Carburetor Repair Kit – Fits MerCruiser 5.0L, 5.7L, 7.4L (Replaces 823426A1)
Rochester Carburetor Repair Kit – Fits MerCruiser 5.0L, 5.7L, 7.4L (Replaces 823426A1) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Rochester Carburetor Repair Kit – Fits MerCruiser 5.0L, 5.7L, 7.4L ...
Product Details
This Rochester 4-barrel carburetor repair kit provides the essential components for rebuilding carburetors on MerCruiser, Volvo Penta, and OMC stern drive engines. It is designed for various V6 and V8 models, including 5.0L, 5.7L, and 7.4L engines manufactured from the late 1970s through the mid-1990s, ensuring a precise fit for Rochester Quadrajet carburetors.
It serves as a direct replacement for multiple OEM and aftermarket part numbers, including MerCruiser 823426A1, Volvo Penta 834985, OMC 983864, and Sierra 18-7077.
- Engineered for direct replacement installation.
- Restores key functions in Rochester 4-barrel carburetors.
- Kit contains gaskets, seals, and hardware for a standard overhaul.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 823426A1 |
| MerCruiser | 1397-8548 |
| Volvo Penta | 834985 |
| Volvo Penta | 855889 |
| OMC | 983864 |
| Crusader | 45334 |
| Sierra | 18-7018 |
| Sierra | 18-7072 |
| Sierra | 18-7077 |
| Sierra | 18-7095 |
| GLM | 76150 |
| GLM | 40760 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is compatible with the following MerCruiser models equipped with Rochester carburetors.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 5.0L (305 CID) | 200 | 4-Stroke | 1987 | 823426A1 | 2 BBL version |
| MerCruiser | 5.0LX (305 CID) | 205-230 | 4-Stroke | 1988–1995 | 823426A1 | 4 BBL version |
| MerCruiser | 5.7L (350 CID) | 260 | 4-Stroke | 1987 | 823426A1 | |
| MerCruiser | 5.7L (350 CID) | 260 | 4-Stroke | 1988–1995 | 823426A1 | |
| MerCruiser | 350 MAG Alpha | 4-Stroke | 1987–1995 | 823426A1 | ||
| MerCruiser | 5.7L Competition Ski | 4-Stroke | 1987–1995 | 823426A1 | ||
| MerCruiser | 7.4L Bravo (454 CID) | 4-Stroke | 1988–1991 | 823426A1 |
Technical Specs
- Product Type
- Carburetor Repair Kit
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Compatibility
- Rochester 4-barrel carburetors
- Dimensions
- 25.0" L x 17.5" W x 3.5" H
- Fitting Type
- Rochester Quadrajet
- Other Technical Attributes
- Fits Rochester Q-Jet carburetors
What’s in the Box
- Gaskets
- Seals & O-Rings
- Needle and Seat Assembly
- Accelerator Pump Cup
- Assorted Small Hardware (clips, retainers)
Installation Notes
- Disconnect the battery and ensure the engine is cool.
- Carefully label and disconnect all fuel lines, vacuum hoses, and linkages from the carburetor.
- Remove the carburetor from the intake manifold.
- Disassemble the carburetor on a clean workbench, taking note of the location of all components.
- Clean all metal parts with a carburetor cleaner and remove any old gasket material.
- Carefully install the new gaskets, seals, needle, and other components from the kit.
- Reassemble the carburetor, ensuring all screws are properly torqued.
- Reinstall the carburetor onto the intake manifold using a new base gasket.
- Reconnect all linkages, hoses, and fuel lines.
- Reconnect the battery, start the engine, and check for leaks. Adjust idle speed and mixture screws as needed.
Troubleshooting & FAQ
How do I know if this kit fits my specific carburetor?
This kit is designed for Rochester 4-barrel (Quadrajet) carburetors used on the listed engines. The best way to confirm is to check the part number stamped on your carburetor or cross-reference it with the numbers in our Part Number Matrix.
What are common symptoms that this rebuild kit can fix?
This kit can resolve issues like fuel leaks, poor idling, hesitation or stumbling on acceleration, difficulty starting, and black smoke from the exhaust (running rich). These problems are often caused by degraded gaskets, a faulty needle and seat, or a worn accelerator pump.
Is any special tuning required after installation?
Yes, after rebuilding and reinstalling the carburetor, you will likely need to adjust the idle speed and the idle mixture screws to ensure the engine runs smoothly. Refer to your engine’s service manual for the correct procedure.
What is the difference between a 2-barrel and 4-barrel carburetor kit?
A 2-barrel carburetor has two venturis (or "barrels"), while a 4-barrel has four. They require different gasket shapes and internal components. This is a 4-barrel kit and is not compatible with 2-barrel models, even if they are on the same engine type (e.g., some 5.0L models).
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. All parts are manufactured in an ISO 9002 facility and are batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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