594061 BS-597414 84004416 Fuel Tank Cap Compatible with B & S w/Tether 675Exi, 725Exi Series Lawn Mower Gas Tank Caps Replacement

What It Is

This is a replacement fuel tank cap with an attached tether, designed for Briggs & Stratton engines in the 675Exi and 725Exi series. It secures the gas tank, prevents fuel spillage, and keeps the cap from being lost during refueling or mowing.

Fitment & Compatibility

• Engine series: Fits B&S 675Exi and 725Exi engines (common on walk-behind mowers, some riders).
• OEM cross-reference: Replaces Briggs & Stratton part numbers 594061, 597414, and 84004416.
• Measurements: Cap diameter is approximately 1.5 inches (38mm). Check your existing cap’s outer diameter and thread pattern—this is a press-on/screw-on cap with a tether loop.
• What to verify: Confirm your mower’s engine model number (stamped on the valve cover or shroud) ends in 675Exi or 725Exi. This cap is not universal—do not assume it fits other B&S engines.
• Aftermarket note: This is a non-OEM part. Tether length and plastic quality may differ slightly from the original.

Key Things to Know

• Installation: Simple—remove the old cap and push/screw the new one on. The tether clips onto the tank neck or a nearby bracket. No tools needed.
• Tether durability: Some users report the tether breaks after a season of heavy use. Consider buying two if you mow frequently.
• Seal quality: The gasket is rubber and seals well initially, but may harden over time. Check for cracks before each season.
• Venting: This cap is not vented (sealed). If your engine requires a vented cap for proper fuel flow, this may cause stalling. Confirm your original cap’s design.

Should You Buy It

Buy this if you need a quick, low-cost replacement for a lost or worn cap on a 675Exi or 725Exi engine and don’t mind non-OEM plastic. Skip it if you need a vented cap, want OEM longevity, or have a different B&S engine series.