AC04154 16 in Lawn Mower Blade for Ryobi 40-Volt Lawn Mower – Half-Moon + Round Center Hole – NOT Compatible with AC18160 – Fits RY40112A, RY40140, P1190, P1109, P1120

What It Is

The AC04154 is a 16-inch replacement blade for select Ryobi 40-Volt battery-powered walk-behind mowers. It uses a half-moon + round center hole pattern and is designed for mulching or standard cutting on residential lawns.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Only fits mowers with a 16-inch cutting deck. Measure your existing blade length or deck opening.
• Model fit: Confirmed compatible with Ryobi models RY40112A, RY40140, P1190, P1109, P1120. Not compatible with AC18160 (different hole pattern).
• Hole pattern: Half-moon shape with a round center hole. Measure your spindle’s center pin—if it’s a full round hole or different shape, this won’t fit.
• OEM vs aftermarket: This is an OEM Ryobi part, so no adapter or modification needed for listed models.

Key Things to Know

• Single review at 1.0/5 stars – extremely low rating. Likely a fitment or quality issue. Check return policy before buying.
• Installation is straightforward – use a socket wrench to remove the blade bolt, replace with this blade, and torque to spec (usually 35-45 ft-lbs). No special tools.
• Common gotcha: The half-moon hole must align exactly with the mower’s drive pin. If the pin is round-only, this blade won’t seat properly.
• Balance-check recommended – even OEM blades can be slightly off. Use a blade balancer after installation to avoid vibration.

Should You Buy It

Buy only if you own one of the listed Ryobi 40V models (RY40112A, etc.) and your current blade uses a half-moon + round hole pattern. The single poor review is a red flag, so compare with other 16-inch Ryobi blades (e.g., AC18160) to confirm hole shape. For most users, a verified OEM or aftermarket blade with better reviews is safer.