Mower Blades 03971900 / 3971900 for Ariens / Gravely

Overview

These aftermarket Mower Blades 03971900 / 3971900 for Ariens / Gravely are replacement high lift mower blades for select Ariens, Gravely mower deck applications using the listed replacement blade number path.

Use this listing when your original blade number matches 03971900 / 3971900 / 03746500 / 51519500 or another replacement number listed below, and your deck uses the same blade length, center-hole style, blade count, deck size, and blade layout.

Key Features

• Aftermarket mower blade set for select mower deck applications
• Available pack quantities: 2-Pack, 3-Pack
• Replacement path: 03971900 / 3971900 / 03746500 / 51519500 / 61559900 / 51112300 / 51520900
• Common deck size: 34 inch, 50 inch
• Blade length: 17-5/16 inch
• Center hole: 5/8 inch
• Blade style: High lift
• Use the original blade number and physical measurements to confirm fitment

Compatible Brands & Model Series

This blade set is used on select Ariens, Gravely mower deck applications with 34 inch, 50 inch decks.

Source fitment examples:

• Ariens: Walk-Behind Mower 34-inch deck :911410 13.5HP B&S (serial numbers 000101 and above)
• Ariens: 911413 14.5HP B&S Gear (serial numbers 000101 and above)
• Ariens: Zoom Zero-Turn Mower 34-inch deck :915131 13HP B&S (serial numbers 000101 and above)
• Ariens: 915151 13HP B&S (serial numbers 000101 and above)
• Ariens: 915157 14HP B&S (serial numbers 000101 and above)
• Ariens: 915169 14HP B&S (serial numbers 000101 and above)
• Gravely: Wide-Area Walk-Behind Mower 34-inch deck :911411 (Waw 34), 13.5HP B&S (serial numbers 000101 and above)
• Gravely: 911412 (Waw 34), 14.5HP B&S (serial numbers 000101 and above)
• Gravely: Zero-Turn Mower 34-inch deck :915130 (Zt 1334), 13HP B&S (serial numbers 000101 and above)
• Gravely: 915140 (Zt 34), B&S (serial numbers 000101 and above)
• Gravely: 915146 (Zt 34), (serial numbers 000101 and above)
• Gravely: 915168 (Zt 34), Carb (serial numbers 000101 and above)

Fitment note: Model names, deck sizes, and serial ranges are provided as fitment clues. Match the original blade number, blade length, center-hole style, blade count, deck size, and mower model before ordering.

Replaces OEM Part Numbers

• 03971900
• 3971900
• 03746500
• 51519500
• 61559900
• 51112300
• 51520900

Blade Specifications

• Blade length: 17-5/16 inch
• Blade width: 2-1/4 inch
• Blade thickness: 0.2 inch
• Center hole: 5/8 inch
• Common deck size: 34 inch, 50 inch
• Blade type: High lift

Common Symptoms of Worn Mower Blades

• Uneven cut quality
• Grass tearing instead of cutting cleanly
• Visible blade wear, cracks, bends, or rounded cutting edges
• Deck vibration from bent or unbalanced blades

Quick Ship Fulfillment

This item may ship directly from one of our trusted U.S. distribution partners to help reduce transit time. Packaging, labeling, or warehouse origin may vary, but the part will match the replacement numbers, fitment notes, and specifications shown in this listing.

Why Buy From PTO Direct USA

• Focused replacement parts for mower deck and PTO repair
• Part-number-first listings to help reduce fitment mistakes
• Clear replacement numbers and fitment notes before you order
• Fast, practical support if you need help checking compatibility

Need Help Confirming Fitment?

If you are not sure whether this blade set fits your mower, send us your mower model number, deck size, and the part numbers from your original blades. We can help you compare them before you order.

FAQ

Will this fit all 34 inch, 50 inch decks?

No. This blade set fits select applications only. Match your original blade number, blade length, center-hole style, deck layout, and mower model before ordering.

Which package quantity should I choose?

Choose the pack quantity that matches your deck blade count and the number of complete blade changes you want to keep on hand.

What should I check before installing?

Compare blade length, center-hole pattern, lift style, deck layout, and original blade number against your mower or OEM diagram. Stop installation if the blades do not match your original setup.