594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement

What It Is

This 594061 fuel tank cap is a replacement gas cap designed for Briggs & Stratton, Toro, and Craftsman lawn mowers. It seals the fuel tank to prevent leaks and evaporation, and includes a built-in vent to maintain proper air pressure during operation.

Fitment & Compatibility

Before buying, confirm your mower uses a 2-inch diameter threaded fuel tank opening. This cap fits most B&S single-cylinder engines (models 12–20 HP) and many Toro and Craftsman walk-behind mowers and riders from the 1990s onward. Check your old cap’s part number—if it ends in 594061, 594062, or 593943, this is a direct replacement. Not compatible with push mowers using a screw-on cap smaller than 1.5 inches or older metal-tank caps with a different thread pitch.

Key Things to Know

• Quality: Made from plastic with a rubber gasket. Some users report the vent can clog over time, causing fuel starvation or pressure buildup.
• Installation: No tools needed—just unscrew the old cap and hand-tighten the new one. Do not overtighten; snug is enough.
• Common gotcha: If your mower runs rough or stalls after replacing the cap, the vent may be stuck. Clean the small hole on top with a paperclip.
• Venting: This is a vented cap. Using it on a non-vented tank (rare on modern mowers) can cause fuel spillage.

Should You Buy It

If you need a quick, affordable fix for a leaking or missing gas cap on a B&S, Toro, or Craftsman mower with a standard 2-inch threaded neck, this is a solid choice. It’s not premium quality, but it works reliably for the price and is easy to install. Avoid it if you have an older mower with a metal cap or a non-standard tank opening.