Koubliztic replacement carburetor kit for Bolens 21" 140cc mower — 11A-020W765 direct-fit with primer bulb & filters

The Koubliztic 11A-020W765 replacement carburetor kit restores fuel delivery and engine responsiveness for Bolens 21" 140cc lawn mowers.

If your Bolens mower is hard to start, idles poorly, or loses power under load, a worn or clogged carburetor is often the cause. This Koubliztic kit is built to match the original fit and function for models that use the 11A-020W765 / 11A-B0BL765 carburetor and includes the most commonly replaced consumables to get your mower running smoothly again.

Will this carburetor fit my Bolens 21" 140cc mower?

Yes — the Koubliztic 11A-020W765 is designed as a direct replacement for Bolens 21" 140cc units that originally used the 11A-020W765 or 11A-B0BL765 carburetor. It also cross-references several OEM part numbers so you can confirm compatibility before ordering.

• Direct replacement for part numbers: 799583, 593261, 595656, 591979, 591160, 590556, 799579.
• Compatible with many carburetor codes listed in the product features for precise match.
• Designed to bolt in without body modification for an easy swap.

What comes in the kit and how does it help installation?

This kit includes the carburetor plus common replacement parts so you won’t need to hunt for small components. Having matched parts in the box shortens downtime and reduces the chance of leaks or fuel blockages after service.

• Included: carburetor (799583), spark plug, two air filters, air filter cover, base plate, throat clamps.
• Also includes primer bulb, fuel filter, fuel shutoff valve, rings, and fuel hose for a complete refresh.
• Installation typically takes 5–10 minutes with standard hand tools and many step-by-step videos available online.

How does this kit affect mower performance and longevity?

Replacing an aged carburetor and worn consumables restores consistent fuel/air mixture control and reliable priming, which improves starting, idling, and load response. The components are factory-tested to help maintain stable engine operation.

• Cleaner fuel flow reduces stalling and hard-starting issues.
• New air filters and primer bulb support correct mixture for smoother throttle response.
• Quality materials and testing help reduce premature wear and extend engine life.

Who is this for: The Koubliztic 11A-020W765 carburetor kit is ideal for homeowners, lawn care technicians, and DIYers who own a Bolens 21" 140cc mower that shows signs of carburetor-related trouble. Choose this kit if you want a straightforward, parts-complete replacement that restores reliable starting and cutting performance without the need to source multiple small components separately.