13CC26JD011 Carburetor Kit Replacement with Air Filter for Troy-Bilt TB30R TB30B 10.5HP 344cc Riding Lawn Mower, Model 13CC26JD011, Replaces 590399 796077

What It Is

This carburetor kit replacement, paired with an air filter, restores fuel-air mixture control and engine performance on Troy-Bilt TB30R and TB30B riding mowers with 10.5HP 344cc engines. Designed for routine maintenance or repair after poor starting, surging, or stalling.

Fitment & Compatibility

• Direct fit for: Troy-Bilt TB30R and TB30B models with 10.5HP (344cc) engines. Also fits some Craftsman, Cub Cadet, and MTD equivalents using the same 590399 or 796077 carburetor.
• Check before buying: Verify your mower’s model number (stamped under seat or on frame) matches TB30R or TB30B. Confirm engine displacement is 344cc—not 420cc or larger. Measure carburetor mounting bolt spacing (typically 2.5 inches center-to-center) and intake flange shape (square vs. rectangular) to avoid mismatch.
• OEM vs. aftermarket: This is an aftermarket kit; OEM part numbers 590399 and 796077 are direct cross-references. Gaskets and seals may differ slightly in thickness—test fit before final assembly.

Key Things to Know

• Installation difficulty: Moderate. Requires basic tools (socket set, screwdriver, pliers) and about 30-45 minutes. Must remove the old carburetor, transfer linkage, and adjust idle mixture screw.
• Common gotchas: The included air filter may not match your original housing exactly—compare dimensions before installing. Float bowl gasket can pinch if not aligned carefully; use a thin layer of grease to hold it in place.
• Quality note: Aftermarket kits often have less precise jets than OEM; you may need to adjust the idle mixture screw 1/4 turn richer or leaner after install.
• Performance tip: Clean the fuel tank and replace fuel lines if they’re old—debris will clog the new carburetor quickly.

Should You Buy It

If your Troy-Bilt TB30R/TB30B is hard-starting, surging, or won’t hold an idle, this kit is a cost-effective fix (under $30) that includes both carburetor and air filter. It’s ideal for DIY owners comfortable with basic small-engine work, but not for those wanting drop-in OEM precision.