594061 Fuel Tank Cap Fit for Craftsman 163cc 21" Self-Propelled Lawn Mower 247.377441 Replace 799585 799684

What It Is

This is a replacement fuel tank cap for Craftsman 21-inch self-propelled lawn mowers with a 163cc engine, specifically model 247.377441. It seals the gas tank to prevent leaks and fuel evaporation during operation and storage.

Fitment & Compatibility

• Direct fit for Craftsman 247.377441 (163cc, 21" deck).
• Replaces OEM part numbers 799585 and 799684.
• Not universal – verify your mower’s model number (stamped on a metal plate under the seat or near the rear wheel). Also check the cap’s outer diameter (approx. 1.5 inches) and thread pitch (standard 2.0mm fine thread). If your current cap is cross-threaded or loose, this may not fix a damaged tank neck.
• Aftermarket cap – may have slightly different venting than OEM; test for tight seal before first use.

Key Things to Know

• Check venting: If your mower stalls after running a few minutes, the cap vent may be clogged. This cap should vent properly, but if the issue persists, clean the cap’s small vent hole.
• Installation is tool-free: Just hand-tighten until snug. Over-tightening can crack the cap or strip the tank threads.
• Common gotcha: Some users report the cap fits but doesn’t seal well on tanks with deformed necks. Inspect your tank neck for cracks or warping before buying.
• Rating caveat: Only 1 review (4.0 stars) – limited real-world feedback. Consider buying from a seller with a return policy for fitment issues.

Should You Buy It

If your Craftsman 247.377441’s original cap is lost, cracked, or leaking, this is a cheap, direct-fit replacement. But if your tank neck is damaged or you have a different model mower, look for a cap with verified measurements or a universal vented cap. For $7.99, it’s worth a try if you’re sure of the model number.