Keep your lawn mower running at peak performance with our Ultimate Mower Deck Tune Up Checklist. From inspecting blades and belts to cleaning out debris and checking pulleys, this guide covers everything you need for a smooth, even cut all season long. Whether you're prepping for spring or doing mid season maintenance, this checklist ensures your mower deck stays sharp, efficient, and trouble free.

Pre Season (Before First Use)

• Inspect Belts & Pulleys • Check for cracks, fraying, glazing • Spin each pulley by hand to confirm smooth operation
• Clean Deck Thoroughly • Remove grass buildup under the deck • Wipe down spindle housings and belt paths
• Lubricate Moving Parts • Grease spindles, idler pivots and tensioners
• Check Belt Tension • Use a tension gauge or deflection method (1/4" to 1/2" deflection at mid span)
• Safety Inspection • Tighten all deck mounting bolts • Verify smooth clutch engagement and disengagement

Mid Season (Every 25 Hours of Use)

• Examine Belt Condition • Look again for wear and replace if cord shows
• Balance and Sharpen Blades • Remove blades and check balance on a blade balancer • Sharpen edges and remove any nicks
• Verify Deck Alignment • Measure side to side deck height (within 1/8")
• Check Belt Path • Ensure belts track properly on sheaves with no off center riding
• Confirm Grass Discharge • Inspect for even discharge and clear any clogs

End Season (Before Storage)

• Remove and Store Belts • Loosen tension and slide belts off to prevent set in
• Final Deck Cleaning • Power wash underside and allow to dry completely
• Prevent Rust • Spray deck edges and spindles with corrosion inhibitor
• Plan Off Season Maintenance • Schedule blade re sharpening and oil change reminders
• Get Winter Storage Guide • Subscribe at powerdrivebelts.com/newsletter for a free PDF

Keep this checklist in your garage for quick reference and don’t forget to sign up for more seasonal tips exclusive discounts and downloadable guides at