594061 Fuel Tank Cap Compatible with B & S To&ro Crafts&man Lawn Mower Gas Tank Caps Replacement (replaces 84004416, 597414) crafts-man m230 gas cap

What It Is

This is a replacement fuel tank cap for small engines, designed to seal the gas tank and allow air flow for proper fuel delivery. It fits many Briggs & Stratton, Toro, and Craftsman lawn mowers, including the Craftsman M230 walk-behind model.

Fitment & Compatibility

Before buying, check these specifics:

• OEM numbers: Replaces 84004416, 597414, and 594061. If your cap has any of these stamped on it, this fits.
• Thread size: Measures approximately 1.5 inches (38mm) in diameter. Measure your tank opening—most small engines use this standard, but some older or larger models may differ.
• Models: Confirmed for Craftsman M230, many Briggs & Stratton single-cylinder engines, Toro Recycler and Super Recycler, and some Murray/MTD units. Not for zero-turn or commercial mowers with larger caps.
• Venting: This cap has a built-in vent (no separate valve). If your original cap was non-vented, this will work, but check that the vent doesn’t cause fuel spillage on steep slopes.

Key Things to Know

• Quality: Aftermarket cap, not OEM. The plastic feels slightly lighter than original, but seals well and holds up to UV exposure for 1-2 seasons.
• Installation: Twist on/off—no tools needed. Ensure the O-ring is seated properly before tightening (hand-tight only; overtightening can crack the cap).
• Common gotcha: If your mower has a fuel shut-off valve in the cap (rare on these models), this cap lacks that feature—it’s a simple open/close vent. Check your original cap for a manual valve lever before buying.
• Vent issues: A stuck vent (new cap) can cause engine starvation or fuel lock. If engine sputters after replacing, loosen the cap slightly to test.

Should You Buy It

If you need a quick, affordable fix for a leaking, cracked, or missing gas cap on a common Briggs & Stratton, Toro, or Craftsman push mower, this is a solid choice. It’s not for commercial use or zero-turn mowers, but for home lawn care, it seals reliably and costs half the OEM price. Just verify your thread size and vent style first.