Koubliztic Carburetor for Bolens 21in 140cc Lawn Mower — Direct-Fit Kit with Primer & Filters

If your Bolens 21" 140cc mower is running rough, stalling, or failing to start, a worn or damaged carburetor is a common cause. The Koubliztic 11A-020W765 carburetor is engineered as a direct replacement for multiple Bolens models and part numbers, and it ships with the small parts you need to complete the job in a single visit to the garage. Each unit is factory-tested for fit and basic function so you can replace the old unit with minimal fuss and get back to mowing.

How will this carburetor improve mower performance?

Replacing a faulty carburetor restores correct fuel/air mix, which helps steady idling, more reliable starting, and smoother throttle response. The kit includes consumable parts so you replace worn piping and filters that often accompany carburetor failure.

• Direct-fit design for Bolens 21" 140cc engines (models listed in compatibility).
• Factory-tested carburetor body to reduce leak or fit issues.
• Includes primer bulb, fuel shutoff valve, and hoses to refresh the fuel path.
• Extra air filters and clamps to ensure a clean intake and secure installation.

Which models and part numbers does it replace?

This Koubliztic kit is made to replace the original Bolens carburetor and several OE and aftermarket part numbers. It matches multiple references so you can cross-check compatibility before ordering.

• Direct replacement numbers include 799583, 593261, 595656, 591979, and others.
• Compatible references listed include 08P502-0034-F1 through 09P702-0128-F1 groups.
• Verify your mower’s model and part number to ensure a match before installation.

What comes in the package and how hard is installation?

The kit arrives with the carburetor plus a set of commonly replaced parts so you won’t need extra trips for hoses or filters. For most users the swap takes about 5–10 minutes if you follow a short how-to video or the mower’s service steps.

• Included: 1 x 799583 carburetor, spark plug, two air filters, cover and base pieces.
• Also: throat clamps, primer bulb, fuel filter, fuel shutoff valve, rings, and fuel hose.
• Simple bolt-on replacement; basic hand tools required and no special tuning in most cases.

What materials and quality checks are used?

Components are made from durable metals and polymers chosen for fuel resistance and wear life. Koubliztic conducts factory-level testing to confirm fit and basic operational stability before shipping.

• Metal and fuel-resistant plastics selected to withstand gasoline and vibration.
• Factory-tested units reduce the chance of immediate leaks or installation failures.
• Spare intake and fuel pieces help extend the serviceable life after replacement.

Who is this for: This replacement carburetor kit is for homeowners and lawn-care pros who own a Bolens 21" 140cc mower with a failing carburetor or for anyone restoring older Bolens models that use the listed part numbers. It’s also suited to DIYers who prefer a single kit with all common small parts included, saving time and separate part sourcing.