M230 Gas Tank Fuel Cap For Craftsman M230 Lawn Mower CMXGMAM1125502 12AVB2R3793

What It Is

This is a replacement gas tank fuel cap designed specifically for the Craftsman M230 lawn mower. It seals the fuel tank to prevent spills, debris ingress, and fuel evaporation during operation and storage.

Fitment & Compatibility

Before buying, confirm your mower model number matches CMXGMAM1125502 or 12AVB2R3793—these are the direct OEM Craftsman models using this cap. The cap fits the M230 push mower with a 2.8‑inch diameter tank opening. It is an OEM replacement part, not a universal cap, so it will not fit other Craftsman models (e.g., M105, M110) or brands without identical neck dimensions. Check the underside of your cap for a part number or measure the tank opening to avoid returns.

Key Things to Know

• Quality: OEM grade plastic with a rubber gasket; holds a tight seal and resists cracking from fuel exposure or temperature changes.
• Installation: Tool‑free—just unscrew the old cap and hand‑tighten the new one. No adjustments needed.
• Common gotcha: The cap includes a vent; if your mower runs rough or starves for fuel, ensure the vent isn’t clogged (clean with a pin). Also, do not over‑tighten—hand‑snug is enough to avoid stripping the threads.
• Check gasket: If the old cap leaked, inspect the tank neck for damage; a worn gasket on the new cap should solve the issue.

Should You Buy It

If you own a Craftsman M230 (model CMXGMAM1125502 or 12AVB2R3793) and need a direct, hassle‑free replacement for a lost, cracked, or leaky fuel cap, this is the right choice. It’s a simple, reliable fix at a fair price with proven fitment.