8TEN LawnRAZOR Blade for Exmark Toro Quest E-Series TimeCutter SS 4200 4225 MX 4275 42-Inch 137-1999-03 Mulching 2 Pack

What It Is

The 8TEN LawnRAZOR Blade is a mulching replacement blade for 42-inch Exmark and Toro zero-turn mowers, designed to cut grass into fine clippings for nutrient recycling. It’s a direct replacement for OEM part 137-1999-03.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch deck and uses the 137-1999-03 OEM blade pattern. This blade fits:

• Exmark: Quest E-Series, TimeCutter SS 4200, 4225, MX 4275.
• Toro: TimeCutter SS 4200, 4225, MX 4275, and other 42-inch Toro zero-turn models using the same OEM blade.
• Measure: Blade length must be 18.5 inches, center hole 1 inch, and oval drive hole 0.5 x 0.75 inches. Check your current blade’s part number—if it’s 137-1999-03, this fits. Do not use on 46-inch or 50-inch decks.

Key Things to Know

• Quality: Made from heat-treated alloy steel for durability; edge holds up well against sticks and rocks. Users report good balance out of the box.
• Installation: Straightforward swap—use a blade removal tool and torque bolts to 70-90 ft-lbs. No special adapters needed.
• Gotchas: This is a mulching blade, not a bagging or discharge blade. It leaves finer clippings but may not eject clippings as far for bagging. Sharpens with a file or grinder; replace when edge is rounded or bent.
• Performance: Works best with dry, short grass. Wet or tall grass may clog due to the mulching design.

Should You Buy It

Yes, if you have a 42-inch Exmark or Toro zero-turn (Quest, TimeCutter, or SS series) and want a budget-friendly mulching blade that matches OEM specs. At $31.95 per 2-pack, it’s a solid value for homeowners who mow frequently and prefer mulching over bagging. Avoid if you need a high-lift blade for bagging or have a different deck size.