The ROP Shop Fuel Cap for Briggs & Stratton & Simplicity 596250, 596472, 596514, & 596611

What It Is

This is a replacement fuel cap for Briggs & Stratton and Simplicity lawn mowers, designed to seal the fuel tank and prevent leaks while allowing pressure venting. It’s a direct fit for models using OEM part numbers 596250, 596472, 596514, and 596611.

Fitment & Compatibility

• OEM cross-reference: Confirm your mower’s fuel cap matches one of these four part numbers (596250, 596472, 596514, or 596611). Check your existing cap for a stamped number.
• Brands: Works with Briggs & Stratton and Simplicity mowers, including many walk-behinds and riders. Also fits some Snapper, Murray, and MTD models using the same cap.
• Measurement: The cap has a standard 2-inch outer diameter and a twist-on thread pattern. Measure your tank opening (roughly 2 inches across) to verify.
• Aftermarket note: This is a non-OEM replacement, but it matches the original fit and function. No modifications needed.

Key Things to Know

• Quality: Made of durable plastic with a rubber gasket. Users report a snug, leak-free seal—no cracking or warping after months of use.
• Installation: Tool-free, takes 30 seconds. Just unscrew the old cap and twist on the new one. Hand-tighten only; overtightening can strip the threads.
• Venting: It includes a built-in vent to prevent vacuum lock in the tank. If your mower stalls after running a few minutes, a clogged vent on your old cap is a common cause—this cap fixes that.
• Gotcha: Not compatible with caps that have a tethered strap or locking mechanism. It’s a plain twist-on cap only.

Should You Buy It

If your Briggs & Stratton or Simplicity mower uses one of the listed OEM part numbers and your current cap is cracked, leaking, or not venting properly, this is a solid, affordable fix. The high rating and positive feedback confirm it works as expected. Skip it if you need a locking cap or a tether.