103-6398 Mower Blades Compatible with Ex Mark 60" Deck Lawn Mower, Gator Mulching Blades 116-5174 Fit for Ex Mark Radius, Turf Tracer, Lazer Z Series, Replace 103-6393 96-749 (3 Pack)

What It Is

This is a 3-pack of aftermarket Gator mulching blades for Ex Mark 60-inch commercial zero-turn mowers. Designed to chop clippings finer than standard blades, they reduce bagging frequency and improve nutrient recycling on large lawns or commercial turf.

Fitment & Compatibility

• Deck size: 60-inch deck only. Measure your deck width before buying – this pack won’t fit 48”, 52”, or 72” decks.
• Model check: Direct fit for Ex Mark Radius, Turf Tracer, and Lazer Z series with 60” decks. Also replaces OEM numbers 103-6393, 96-749, and the OEM Gator blade 116-5174.
• Measurements: Each blade is 20.5” long, 2.5” wide, with a 5/8” center hole and 1/4” offset. Verify your spindle’s bolt pattern (usually 5/8” center hole on Ex Mark).
• OEM vs aftermarket: These are aftermarket – not made by Ex Mark. They meet OEM specs but may have slight thickness or balance differences. Check your deck’s blade bolt torque spec (usually 70-90 ft-lbs) before install.

Key Things to Know

• Mulching performance: The “Gator” serrated edge design cuts finer than standard lift blades. Expect better clipping dispersion in dry grass, but clumping in wet or tall grass – adjust cutting height accordingly.
• Installation: Straightforward swap – remove old blades, clean spindle, install with sharp edge facing deck opening. Use a torque wrench; overtightening can strip the spindle threads.
• Durability: Heat-treated steel, but these are thinner than some OEM blades. They may dull faster on sandy soil or frequent mowing. Sharpen every 10-15 hours for best results.
• Balance: Check blade balance before mounting – even slight imbalance can vibrate your deck and wear spindle bearings. Use a blade balancer (cheap tool).

Should You Buy It

If you have an Ex Mark 60” zero-turn and want improved mulching without paying OEM prices, this 3-pack is a solid value. It’s ideal for commercial operators or large residential lawns where fine clipping breakdown matters. Skip it if you need bagging blades or mow very wet, thick grass regularly – standard lift blades may perform better there.