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  7. Holley 2300, 2 Barrel Marine Carburetor Rebuild Kit K4273
Holley 2300, 2 Barrel Marine Carburetor Rebuild Kit K4273
Holley 2300, 2 Barrel Marine Carburetor Rebuild Kit

Holley 2300, 2 Barrel Marine Carburetor Rebuild Kit K4273

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Your Price: $38.95
Holley Marine, Mercury Marine, Ford, OMC, Pleasure Craft
Part Number: K4273
Availability: In Stock

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Holley 2300, 2 barrel carburetor rebuild kit. 

  • This is a marine kit. 
  • Very high quality, made in the USA. 
  • New, currently being produced. 
  • Designed for today's fuel.

Instructions - exploded view, parts list, illustrated adjustments
Flange gasket (mounting)
Black nitrate coated gaskets (prevents leaks)
Power valve (standard 5.5 HG)
Idle mixture screws
Viton tip needle & seat
Thermostat gasket
Float bowl gasket
Metering block gasket
Throttle body gasket
Fuel inlet gasket
Accelerator pump diaphragm
Main discharge check weight

This carburetor kit includes 2 different needle & seat assemblies depending on what your carburetor requires.

Holley 2300 Identification

Holley 2300 Carburetor

There are a lot of carburetor kits for the Holley 2300,
so it is important to find the carburetor number and matching the
carburetor number with one of our kits will insure you get the correct
carburetor kit.


Most 2300 Holley carburetors had a tag which was attached to one of the float bowl screws, Holley also did a good job of stamping the front of the tower with the carburetor number. You are looking for the LIST #. This is usually a 4 digit number, or a 5 digit number on marine carburetors. A lot of carburetors will actually have the work LIST stamped in front of the number. Also look for a designator like -A, or -AAS. This further defines the carburetor number. Most kits will be found ok with just the LIST number. You will find carburetor numbers listed as R-2345A, or something similar. In this case the LIST # is 2345.

Rebuild kit, made in the USA from high quality ethanol ready parts. Everything shown in the photo is included in the kit, additional parts may be purchased by choosing your carburetor type in our main catalog. For additional help including rebuild videos, free manuals, and troubleshooting, please see our technical section.

To make sure you get the correct carburetor kit, please match your carburetor number with the list provided. This kit is good for the carburetor numbers listed only. No return on opened kits.

Using the application above assumes the carburetor has never been replaced.

Nitrophyl floats tend to absorb fuel over time. Don't forget to replace the float while you are doing the rebuild.


302" 5.0L
MCM 888 W/302" 4.9L
170, 175, 185, 190, 200 W/302" 5.0L, 307" 5.0L 8CYL.
155, 165, 175, 185 W/302" 4.9L 8CYL.




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