6291 – Exmark 17-29/32″ x 5/8″ Rotary Mower Blade (Replacement Blade) The Exmark 6291 17-29/32″ x 5/8″ Rotary Mower Blade is a precision-manufactured replacement cutting blade designed to restore clean, consistent cutting performance on compatible Exmark riding mowers and zero-turn mowers that require a 17-29/32″ length and 5/8″ center hole diameter. Constructed from high-strength, heat-treated steel, this rotary blade delivers durable sharpness, even grass discharge, and reliable cutting performance across residential and commercial mowing conditions. Product Details Manufacturer Part Number: 6291 Brand: Exmark (Aftermarket / OEM-Spec Replacement) Part Type: Rotary Mower Blade Dimensions: 17-29/32″ Length × 5/8″ (0.625″) Center Hole Diameter Material: Heat-treated high-strength steel Blade Style: Single-bevel cutting edge Application: Exmark mowers and compatible decks using 17-29/32″ × 5/8″ blades Replaces: OEM rotary blades specified with 17-29/32″ × 5/8″ dimensions Condition: New Function The Exmark 6291 mower blade is engineered to: Deliver a clean, consistent cut for professional lawn appearance Cut evenly across the deck to prevent scalping or uneven grass height Provide long-lasting edge retention through normal blade wear Support even grass discharge and reduced clumping Withstand typical mowing stresses without bending or damage A correctly sized blade is essential for optimal cut quality, mower deck performance, and operator safety. Compatible With The Exmark 6291 17-29/32″ × 5/8″ rotary mower blade replaces original equipment blades on mowers that use: Exmark commercial and residential zero-turn mowers Riding lawn tractors and walk-behind mowers configured for 17-29/32″ × 5/8″ blades Any mower deck requiring a 17-29/32″ length with a 5/8″ center hole Always verify fitment by checking deck size, spindle shaft diameter, and blade mounting requirements before purchasing. How It’s Used This rotary mower blade installs on the mower’s spindle assembly: Park mower on level ground and set parking brake. Turn off engine and disconnect the spark plug for safety. Raise mower deck to access blades. Loosen mounting hardware and remove the worn blade. Clean spindle flange area from built-up debris. Align replacement blade (17-29/32″ × 5/8″) with spindle hole. Install mounting bolt and torque to manufacturer specifications. Reconnect spark plug and lower deck before operation. Proper installation ensures balanced blade rotation, safe operation, and superior cutting. Suggested Maintenance Inspect blades for nicks, wear, or bending before each mowing season Sharpen blade regularly for best cutting results Replace blade if damaged, cracked, or excessively worn Balance blades after sharpening to reduce vibration Confirm mounting hardware tightness each season Notes / Equivalent Replacements Replaces OEM Exmark rotary blades matching 17-29/32″ length and 5/8″ center hole Confirm blade size and center hole diameter before ordering as variations exist across deck models Aftermarket blades may differ in steel grade and cutting performance The Exmark 6291 17-29/32″ × 5/8″ Rotary Mower Blade is a reliable replacement designed to restore cutting performance, improve grass discharge, and deliver a clean, professional finish — perfect for decks requiring precise rotary blade dimensions.
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