Oregon 07-304 Fuel Cap Replacement for Briggs & Stratton 692046, 397974, PT11028

What It Is

This is a replacement fuel cap for Briggs & Stratton engines, designed to replace OEM part numbers 692046, 397974, and PT11028. It fits many walk-behind mowers, riding mowers, and small engines using a standard twist-on fuel tank opening.

Fitment & Compatibility

Before buying, confirm your engine’s fuel cap opening diameter is 2.5 inches (the standard size for these OEM numbers). Check your current cap or tank neck for the stamped part number—if it matches 692046, 397974, or PT11028, this cap will fit. It is not a universal cap; do not assume it fits all Briggs & Stratton engines (e.g., some older or larger models use different thread patterns). Measure the cap’s outer diameter and thread pitch if possible. This cap is not vented—if your original cap has a vent hole, you may need a vented version instead.

Key Things to Know

• Material: Plastic construction; feels slightly lighter than OEM caps but seals reliably when tightened fully.
• Installation: Simple twist-on—no tools needed. Ensure the gasket is seated properly to prevent leaks.
• Common gotcha: Some users report the cap can be difficult to remove if over-tightened. Hand-tighten only.
• Venting: Since it’s non-vented, it may cause fuel flow issues on engines that require a vented cap (e.g., certain older models). Check your engine’s manual or original cap for a vent hole.

Should You Buy It

If you need a direct replacement for a Briggs & Stratton engine using OEM 692046, 397974, or PT11028, and your original cap was non-vented, this is a cheap, functional fix. For engines requiring a vented cap, look elsewhere.