692046 Fuel Tank Cap Fits for Torro Craftsmann Briggss & Strattonn 397974 PT11028, Replacement for Intek Model Series 121600 Vertical, 3.5-6.75 HP Vertical Max

What It Is

This is a replacement fuel tank cap designed for small engines, primarily used on Toro, Craftsman, and Briggs & Stratton lawn mowers. It seals the fuel tank to prevent leaks and debris contamination, and includes a built-in vent for proper fuel flow.

Fitment & Compatibility

Before buying, verify your mower’s engine model and cap specifications:

• Engine series: Fits Briggs & Stratton Intek Model Series 121600 vertical engines, and 3.5–6.75 HP vertical shaft engines.
• Cross-reference numbers: Replaces OEM parts 692046, 397974, and PT11028. Check your current cap for these numbers.
• Cap type: This is a vented cap (not pressure-sealed). If your original cap has a vent hole or breather, this is a direct match. Non-vented caps require a different part.
• Thread size: Standard 2-inch diameter thread. Measure your tank opening (inner diameter) to confirm—most Toro/Craftsman decks from the 2000s onward use this size.
• Brand fit: Listed for Toro, Craftsman, and Briggs & Stratton, but may also fit some MTD, Cub Cadet, or Husqvarna models with the same thread and vent style.

Key Things to Know

• Vent function: This cap has a small one-way valve. If your mower sputters or starves for fuel, the vent may be clogged—clean or replace the cap.
• Installation: Hand-tighten only. Overtightening can crack the plastic or strip the threads. No tools needed.
• Quality: Aftermarket part. Some users report slightly looser fit than OEM, but still seals adequately. Check for cracks or warping before first use.
• Gotcha: Not compatible with pressurized fuel systems (e.g., some older Tecumseh engines). Use only on gravity-fed or low-pressure tanks.

Should You Buy It

If your current cap is cracked, leaking, or the vent is clogged, this $10 replacement is a solid, affordable fix for most standard Toro/Craftsman/Briggs mowers. It’s best for DIY maintenance on 3.5–6.75 HP vertical engines. Avoid if you need an OEM-specific cap for a pressurized system or have a non-standard thread size.