Description

Mercury MerCruiser Quicksilver 823427A1 is a genuine OEM Rochester 2-barrel carburetor repair kit for older MerCruiser GM-based 4-cylinder and 6-cylinder engines. Mercury’s current product listing identifies this kit for 1964–1983 MerCruiser 4- and 6-cylinder engines made by GM and describes it as an all-in-one carburetor repair package.

Key Features

• Genuine Mercury MerCruiser / Quicksilver OEM part number 823427A1.
• Designed for Rochester 2-barrel carburetors.
• Mercury’s official listing says the kit includes gaskets, accelerator pump, inlet needle and seat, and fuel filter.
• Mercury’s official listing also specifies a 74-micron nylon mesh cloth filter element.
• Current dealer listing shows approximate packaged specs of 0.30 lb, 6.40 in x 2.10 in x 7.20 in.

Engine Compatibility

The strongest supportable fitment for 823427A1 is 1964–1983 MerCruiser 4-cylinder and 6-cylinder GM-based engines using the Rochester 2-barrel carburetor. Broader current cross-reference listings also connect this kit with older MerCruiser inline applications including 90, 110, 120, 140, 2.5L, and 3.0L families, but the safest match is the exact carburetor and serial-specific application rather than engine size alone.

Serial Number Fitment Notice

Verify fitment by exact engine serial number and carburetor model before ordering. Mercury’s official product page specifically directs users to the owner’s manual or service manual for exact application confirmation, which is especially important on older carbureted MerCruiser engines where similar Rochester units can use different internal service parts.

When This Part Needs Replacement

This kit is typically used when the carburetor is leaking, running rough, stumbling off idle, or being rebuilt as part of fuel-system service. That guidance is a practical service inference based on Mercury identifying 823427A1 as a complete Rochester 2-barrel carburetor repair kit with the core wear-and-service components included.

Installation Notes

Install 823427A1 only after confirming the exact Rochester 2-barrel carburetor application on the engine being serviced. Current Mercury references position this as the correct rebuild kit for the covered MerCruiser GM 4- and 6-cylinder carburetor family, and Mercury directs users to the service manual for specific replacement instructions.

Alternate/Superseded Part Numbers

Current dealer references associate 8872, 8873, 2067, 2631, 2634, 2637, 3459, 3464, 7542, 7543, and 7547 as earlier or related OEM numbers connected to 823427A1. Broader cross-reference sources also show related aftermarket references including 18-7746, 18-7070, GLM76068, and GLM76075.

Parts Desk Insight

This is one of those kits where the carburetor style matters more than the engine label. Matching 823427A1 to the exact Rochester 2-barrel setup first usually saves a lot of hassle, especially on older MerCruiser engines that may have had carburetor swaps over the years.

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