Ryobi Part # 6797329 blade - d150 x 1.5mm

What It Is

The Ryobi Part # 6797329 is a replacement mulching blade designed for select Ryobi 40V and gas walk-behind mowers with a 150mm (approx. 5.9-inch) diameter and 1.5mm blade thickness. It’s intended for residential lawn care, providing a fine cut for grass clipping recycling.

Fitment & Compatibility

Before buying, confirm your mower deck size (usually 16-21 inches) and that the blade diameter is exactly 150mm (measure your old blade center to tip). This part fits Ryobi models like the RY40180, RY40190, RY401140, and some 40V brushless mowers, but not all—check your owner’s manual or online compatibility lists. It’s an OEM Ryobi part, so it matches original specs; aftermarket blades may vary in thickness or balance. Also verify the center hole (usually a 7-point star or 5/8-inch round) and blade offset—measure your old blade’s shape to avoid a mismatch.

Key Things to Buy

• Quality: OEM construction with hardened steel, but thin (1.5mm) for mulching—prone to bending on rocks or thick roots.
• Installation: Easy for DIYers—requires a socket wrench and blade removal tool (or block of wood). Torque to 35-45 ft-lbs; overtightening can strip bolts.
• Gotchas: Always disconnect spark plug or battery before swapping. Sharpen or replace every 25 hours of use for best cut. Check blade balance after installation—an unbalanced blade vibrates and damages spindle.
• Common issue: The 150mm size is specific—won’t fit larger 18-inch or 21-inch mowers without deck modification.

Should You Buy It

If you own a compatible Ryobi 40V or gas mower and need a reliable OEM replacement for mulching, this blade delivers consistent performance at $14.99. It’s right for homeowners with small-to-medium lawns who prioritize fine mulching over bagging, but skip it if you mow rough terrain—the thin steel won’t last long against debris.