Fuel Gas Tank Cap Vented for Troy-Bilt 751-0603B 951-3111 for Briggs & Stratton JD MTD Toro Cub Cadet MTD Exmark Husqvarna 539914363 Craftsman Bobcat Replace for Stens125-384 Rotary 8935

What It Is

This is a vented fuel tank cap designed to replace the original cap on many popular riding lawn mowers and zero-turn mowers. It lets air into the tank as fuel is used, preventing vacuum lock and ensuring steady engine operation.

Fitment & Compatibility

Before buying, confirm your mower’s fuel cap threads and neck diameter match the OEM numbers listed: Troy-Bilt 751-0603B, 951-3111; Briggs & Stratton 539914363; and Stens 125-384, Rotary 8935. This cap fits many models from Cub Cadet, MTD, Toro, John Deere, Husqvarna, Craftsman, Bobcat, and Exmark. To be safe, measure your old cap’s outer diameter (approx. 1.5 in.) and thread pitch, or check your mower’s model number against the cross-reference list. It replaces both vented and non-vented caps, but if your original cap had a separate vent or a fuel gauge, this one does not include those features.

Key Things to Know

• Quality & fit: Made by Cub Cadet, it’s an OEM-level replacement, not a cheap generic. Expect durable plastic and a snug seal.
• Installation: Takes 10 seconds—just unscrew the old cap and screw this one on. No tools needed.
• Common gotchas: If your mower sits in direct sun, the vent can sometimes weep fuel when the tank is full and hot. Also, if you have a fuel gauge built into your current cap, you’ll lose that function with this cap.
• Venting: It’s a passive vent—no moving parts. If your engine still starves for fuel after installation, check the fuel line or filter first.

Should You Buy It

If your current cap is cracked, leaking, or causing a vacuum lock that stalls the engine, this is a solid, affordable fix. It’s best for owners of popular lawn tractors and zero-turns who want a direct OEM replacement without paying dealer markup. Skip it if you need a built-in fuel gauge or a cap for a very old or uncommon brand not listed.