LC221A carburetor For Husqvarna LC221A LC121P HU625AWD HU675HWT 5521P LC221AH HU725AWDHQ LC221FHE HU675AWD HU550FH LC153 21'' 22'' Lawn Mower w/ 140cc 163cc B&S 725exi Motor

What It Is

This is a replacement carburetor designed for Husqvarna walk-behind lawn mowers powered by Briggs & Stratton 140cc, 163cc, or 725exi engines. It handles fuel metering and delivery to the engine cylinder, commonly failing when a mower won’t start, runs rough, or stalls under load.

Fitment & Compatibility

Check engine model first – This carburetor fits B&S 725exi, 140cc, and 163cc engines, not all Husqvarna mowers. Confirm your engine’s model number (stamped on the blower housing or valve cover).

Deck size – Works with 21" and 22" decks, but deck size alone doesn’t guarantee fit. Cross-reference your mower’s model number against the list (LC221A, LC121P, HU625AWD, HU675HWT, 5521P, LC221AH, HU725AWDHQ, LC221FHE, HU675AWD, HU550FH, LC153).

OEM vs aftermarket – This is a non-OEM replacement. It often works well but may require minor adjustments (idle speed, float level). OEM part numbers for reference: Husqvarna 532429205, 532401400, or B&S 799583.

Measurements – The carburetor mounting bolt spacing is approximately 2.75" center-to-center. If your old carburetor matches that, it’s likely correct.

Key Things to Know

• Installation difficulty – Moderate. You’ll need basic tools (screwdrivers, pliers, socket set) and about 30–60 minutes. Expect to clean old gasket residue and adjust the throttle/governor linkage.
• Quality – Most users report it works out of the box, but some get units with sticky floats or misadjusted needles. Check the float bowl for debris before installing.
• Common gotcha – The included gaskets may not match exactly. Keep your original gaskets as a backup. Also, the fuel shut-off solenoid (if your mower has one) must be transferred from the old carburetor.
• Fuel system prep – If your mower sat with old gas, clean the fuel tank and line before installing. A new carb won’t fix a clogged tank.

Should You Buy It

Buy this if you have a compatible Husqvarna mower with a B&S 725exi, 140cc, or 163cc engine that won’t start or runs poorly due to a clogged or failed carburetor, and you’re comfortable with basic engine repair. Skip it if you need OEM exactness or want a zero-adjustment, bolt-on fix—pay more for a genuine Husqvarna or B&S carburetor.