Maxpower 334245 2-1/4" Universal Tractor Gas Cap

What It Is

The Maxpower 334245 is a universal replacement gas cap for lawn tractors and zero-turn mowers, designed to fit fuel tanks with a standard 2-1/4-inch (57mm) neck opening. It replaces many OEM caps that fail due to cracked plastic or lost seals.

Fitment & Compatibility

• Measurement is critical: Measure the inside diameter of your fuel tank neck—must be exactly 2-1/4 inches (57mm). This cap will not fit smaller or larger openings.
• Brand cross-reference: Compatible with many John Deere, Craftsman, Husqvarna, MTD, Cub Cadet, Troy-Bilt, Murray, and Ariens models. Always verify your specific model number.
• OEM replacement for: Commonly replaces John Deere M156241, M145257, AM107599; Craftsman 532145257; MTD 951-10561A; Husqvarna 532145257.
• Not for push mowers or small handhelds—only for riding mowers and tractors with the listed neck size.
• Check for venting: This cap is vented. If your original cap was non-vented (rare on tractors), do not use this—it may cause fuel leaks.

Key Things to Know

• Material quality: Made of plastic with a rubber gasket. The gasket can dry out over time; inspect it annually. Some users report the cap feels slightly loose on certain tanks—if so, a small o-ring or gasket replacement can tighten the seal.
• Installation: Tool-free, hand-tighten only. Over-tightening can crack the cap or damage the tank threads.
• Common gotcha: The cap may not seat fully on tanks with a raised lip or non-standard thread depth. Test fit before riding; a loose cap can spill fuel on hot engine parts.
• Venting: Properly vented for most engines. If your engine starves for fuel or builds pressure, the vent may be clogged—clean with compressed air.

Should You Buy It

This cap is a solid, budget-friendly replacement for a worn or missing tractor gas cap if your tank neck measures exactly 2-1/4 inches. It’s not for push mowers or odd-sized tanks, but for the vast majority of standard riding mowers, it works reliably. If you need a perfect OEM look or a non-vented cap, look elsewhere.