Sierra Carburetor Kit 18-7238 for 4.3L and 4.3L H.O. Engines 1990-92, Replaces OMC 986796 / Volvo Penta 3854020

The Sierra 18-7238 Carburetor Kit is a rebuild kit engineered for the Holley Model 2300 two-barrel carburetor used on 4.3L and 4.3L H.O. Engines built in the 1990-92 model years (Mfg. Code H2). It is built to restore carburetor performance to original specification, addressing the wear, gasket failure, and fuel-metering drift that cause rough idle, hesitation, flooding, and hard starting in aging marine carburetors. The kit is engineered for this specific carburetor application so the components are a precise fit, form, and function match rather than a generic universal kit.

This kit is the correct rebuild solution for boat owners and marine technicians servicing 4.3L GM-based engines equipped with the Holley 2300 2-barrel carburetor, and it cross-references directly to OMC and Volvo Penta OEM part numbers, making it easy to source the correct rebuild parts without hunting down a discontinued OEM kit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7238
• Product Type: Carburetor Kit
• Included Components: Carburetor Kit
• Compatible Engine: 4.3L, 4.3L H.O.
• Model Years: 1990-92
• Carburetor Mfg. Code: H2
• Carburetor Model: 2300
• OEM Cross Reference: OMC 986796, VOLVO 3854020
• Weight: 0.38 pounds
• Package Dimensions: 4.8 cm x 16.1 cm x 18.5 cm
• Finish: Machined
• UPC: 030999622365

Fitment

• 4.3L and 4.3L H.O. Engines, 1990-92, with Holley Mfg. Code H2, Model 2300 two-barrel carburetor

Replaces (OEM)

• OMC 986796
• VOLVO 3854020

Frequently Asked Questions

What engines does the Sierra 18-7238 carburetor kit fit? The 18-7238 kit fits 4.3L and 4.3L H.O. Engines from the 1990-92 model years that use a Holley Model 2300 two-barrel carburetor (Mfg. Code H2).

What OEM part numbers does 18-7238 cross-reference to? This kit replaces OMC 986796 and Volvo Penta 3854020, so it is a direct rebuild solution wherever either of those OEM numbers is specified.

Is this a full carburetor or a rebuild kit? The 18-7238 is a rebuild kit for restoring an existing Holley 2300 carburetor, not a complete replacement carburetor.

How much does the 18-7238 carburetor kit weigh? It weighs 0.38 pounds.

What are the package dimensions of the 18-7238 kit? The kit ships in packaging measuring 4.8 cm x 16.1 cm x 18.5 cm.

Will this kit work on any 4.3L marine engine? No, the 18-7238 kit is matched to 4.3L and 4.3L H.O. Engines built in the 1990-92 model years with the specific Holley 2300 carburetor identified by Mfg. Code H2; other model years and carburetor codes use a different Sierra kit number.

Does the kit include a new float? No float is listed as included with the 18-7238 kit.

Is the Sierra 18-7238 kit OEM quality? Sierra engineers this carburetor kit to match the original application in fit, form, and function, so it performs as a precise OEM-equivalent rebuild rather than a generic universal kit.

What symptoms does rebuilding with kit 18-7238 fix? Rebuilding a Holley 2300 carburetor with kit 18-7238 addresses common issues like rough idle, hesitation, flooding, and hard starting caused by worn gaskets and fuel-metering components.

What finish does the 18-7238 kit have? The components in this kit have a machined finish.

Is 18-7238 the same as the H4 4160 carburetor kit for 4.3L engines? No, 18-7238 is specific to the H2-code Model 2300 carburetor; the same 4.3, 4.3 H.O. Engine with an H4-code Model 4160 carburetor uses a different Sierra kit, 18-7237.

What is the UPC for the Sierra 18-7238 carburetor kit? The UPC for the 18-7238 carburetor kit is 030999622365.