Sierra Carburetor 18-7376N, Replaces 3310-864943A01 and 3310-861245A1, for 1998 and Newer 5.7L Engines

The Sierra 18-7376N is a carburetor built on a new anodized aluminum casting rather than a remanufactured core, which sidesteps the difficulty of rebuilding older red-cast marine carburetor bodies that have been exposed to harsh marine environments over time. Each unit is flow tested across the entire throttle range before it leaves the factory, and the fuel mixture and idle settings are preset so that only minor idle and choke adjustments are typically needed at installation. The finish is machined for a clean, precise fit at the mounting flange.

This carburetor is built for 1998 and newer 5.7L applications, and covers MCM 5.7L engines within serial number range 0L010037-0W300754 as well as MIE/Tow Sports 5.7L engines within serial number range 0L002003-0W090899. A base gasket is included with the carburetor, and Sierra specifies gasket 18-0994 as the replacement gasket for future service. The 18-7376N is designed to meet or exceed OEM specifications for fit, function, and durability.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7376N
• Product Type: Carburetor
• Construction: New anodized aluminum casting (non-remanufactured)
• Exterior Finish: Machined
• Fuel Type: Gasoline
• Weight: 4.2 pounds
• Included Components: Carburetor with base gasket
• Replacement Gasket: 18-0994
• UPC: 808282339920

Fitment

• 1998 and newer 5.7L applications
• MCM 5.7L, serial numbers 0L010037-0W300754
• MIE/Tow Sports 5.7L, serial numbers 0L002003-0W090899

Replaces (OEM)

• 3310-864943A01
• 3310-861245A1

Frequently Asked Questions

What engines does the Sierra 18-7376N carburetor fit? The 18-7376N is built for 1998 and newer 5.7L applications, covering MCM 5.7L engines in serial number range 0L010037-0W300754 and MIE/Tow Sports 5.7L engines in serial number range 0L002003-0W090899.

Is a gasket included with the 18-7376N carburetor? Yes, the Sierra 18-7376N ships with its base gasket included, so no separate gasket purchase is needed for the initial installation.

What OEM part numbers does the 18-7376N replace? It replaces OEM numbers 3310-864943A01 and 3310-861245A1.

Is the 18-7376N a new or remanufactured carburetor? It is a new, non-remanufactured unit built on a new anodized aluminum casting, not a rebuilt core.

What is the 18-7376N carburetor made of? The carburetor body is a new anodized aluminum casting with a machined exterior finish.

Does the 18-7376N need adjustment after installation? The fuel mixture and idle settings on the 18-7376N are preset from the factory, so typically only minor idle and choke adjustments are needed after it is installed.

How much does the Sierra 18-7376N carburetor weigh? The 18-7376N weighs 4.2 pounds.

What gasket should I use if I need to replace the one included with the 18-7376N? Sierra specifies gasket 18-0994 as the replacement gasket for the 18-7376N carburetor.

Is every 18-7376N carburetor tested before it ships? Yes, each 18-7376N is flow tested throughout the entire throttle range before leaving the factory.

Does the 18-7376N meet OEM specifications? The 18-7376N is designed to meet or exceed OEM specifications for fit, function, and performance on its listed 1998-and-newer 5.7L applications.