TB230 Fuel Tank Cap For TB230 Troy-Bilt Self-Propelled Lawn Mower Model 12AVB2A3711

What It Is

This is a genuine OEM fuel tank cap designed to replace the original cap on the TB230 Troy-Bilt self-propelled lawn mower, specifically model 12AVB2A3711. It seals the fuel tank to prevent leaks and debris ingress during operation and storage.

Fitment & Compatibility

Before buying, confirm your mower’s model number is 12AVB2A3711 (found on a sticker under the seat or on the frame). This cap also fits other TB230 variants with the same fuel tank design, but do not assume universal fit—cross-check your mower’s model against the OEM part number. Measure the tank opening diameter (typically ~1.5 inches) and compare to the cap’s listed specs. Aftermarket caps may vary in thread pitch or seal shape, so sticking with this OEM part avoids leak issues.

Key Things to Know

• Quality: Genuine Troy-Bilt part, but 3.5/5 rating suggests some users report loose fit or early seal wear. Inspect the rubber gasket on arrival for cracks.
• Installation: Tool-free—simply twist off the old cap and screw on the new one. Takes under 30 seconds.
• Common gotcha: If your old cap is cracked or missing, the new cap may not seal perfectly if the tank rim is damaged. Check for warping or dirt on the tank neck before installing.
• Venting: This cap is not a vented design; ensure your mower’s tank vent (if separate) is clear to avoid vapor lock.

Should You Buy It

Buy this if you need a direct OEM replacement for a TB230 model 12AVB2A3711 and want guaranteed fit without measuring. Skip it if you’re on a tight budget—aftermarket caps for ~$8 work on many TB230s, but check thread compatibility first.