MaxPower 331387XB Commercial Mulching Blade for 21 in. Cut Toro, Exmark, Lawn Boy Mowers Replaces OEM #'s 108-0954-03, 116-4500, 133-8182-03
Check current price, fitment notes, and availability on Amazon:
🛒 See Price on AmazonWhat It Is
The MaxPower 331387XB is a commercial-grade mulching blade designed for 21-inch walk-behind mowers from Toro, Exmark, and Lawn Boy. It replaces OEM part numbers 108-0954-03, 116-4500, and 133-8182-03, and is built for fine chopping and recirculating clippings back into the turf.
Fitment & Compatibility
Before buying, confirm your mower deck is exactly 21 inches (not 20 or 22). This blade fits select Toro TimeCutter, Super Recycler, and Recycler models, plus Exmark Lazer Z and Quest, and Lawn Boy Insight and Platinum series. Check your mower’s model number against MaxPower’s online fitment guide—generic “fits Toro” listings often miss specific chassis variations. The blade measures 21 inches long with a 1-inch center hole and 5-point star drive. Do not assume it fits all 21-inch Toro decks; older or non-commercial models may require a different blade pattern.
Key Things to Know
- Quality: Made from heat-treated, hardened steel with a black powder coat. Users report it holds an edge longer than OEM blades in heavy grass or debris.
- Installation: Straightforward if you have a socket and torque wrench. Blade bolts typically require 30-40 ft-lbs. Use thread locker if bolts are worn.
- Common Gotchas: This is a mulching blade only—it will not bag or side-discharge well. Also, the 5-point star center may not fit some older Toro spindles that use a 7-point pattern. Measure your existing blade’s center hole shape before ordering.
- Balance: Check blade balance after sharpening; some units have been reported slightly off-center out of the box.
Should You Buy It
Buy this if you need a durable, affordable replacement for a compatible 21-inch Toro, Exmark, or Lawn Boy mower and primarily mulch grass. It’s a strong value for commercial use or tough lawns, but skip it if your mower uses a different center drive pattern or you need a universal blade for bagging or side discharge.
Related Parts & Accessories
