13WX78BS011 Oil Filter Compatible with Troy Bilt Bronco 42" Lawn Mower, Includes 20 083 02-S Air Filter & 52 050 02-S Oil Filter, Fits Kohler Courage 15 16 17 18 19 20 21 22 HP YTH21K46 Engines

What It Is

This is a three-piece maintenance kit for Troy-Bilt Bronco 42” lawn tractors, containing one oil filter (OEM 52 050 02-S) and one air filter (OEM 20 083 02-S). It’s designed specifically for engines in the Kohler Courage series (15–22 HP) and the YTH21K46 model.

Fitment & Compatibility

• Deck size: 42-inch cutting deck (Bronco 42”).
• Engine family: Kohler Courage single-cylinder, vertical shaft engines from 15 to 22 HP (e.g., SV470, SV480, SV530, SV590, SV600, SV610, SV620, SV720). Also fits the YTH21K46 model.
• What to verify: Check your engine’s model number (stamped on the valve cover or blower housing). The oil filter replaces OEM 52 050 02-S; the air filter replaces OEM 20 083 02-S. Measure the air filter’s length (approx. 5.5”) and width (approx. 3.5”) to confirm fit.
• OEM vs aftermarket: This is a direct-replacement aftermarket kit. Not an OEM Kohler or Troy-Bilt part, but dimensions match the originals.

Key Things to Know

• Quality: Buyers report good seal and fit, but some note the air filter foam is slightly thinner than OEM. Expect 50–100 hours of use before replacement.
• Installation difficulty: Easy – oil filter hand-tighten only (no wrench needed), air filter snaps into housing. Drain oil first.
• Common gotcha: The oil filter is a small spin-on type. If your engine uses a cartridge-style filter, this kit won’t fit. Also, the air filter is square – won’t work on round-style housings.
• Price: $32.99 is competitive for a three-piece set; individual OEM parts would cost about $25–30 total, so this is a fair value.

Should You Buy It

Buy this if you own a Troy-Bilt Bronco 42” with a Kohler Courage engine and want a one-box solution for both filters. It’s a solid value for routine maintenance, but if you prefer OEM parts or have a different engine family (e.g., Briggs & Stratton), skip it.