An uneven cut does not automatically mean the deck needs adjustment. Tire pressure, blade condition, grass conditions, deck contamination, worn components, machine pitch, and terrain can produce similar-looking results.
Photograph the cut before changing settings.
Consistent ridge or step
A repeatable height difference across passes is more useful than a vague “cuts bad” description. Note which side is higher and whether it changes with direction.
Scalping or bouncing
Terrain, speed, deck position, anti-scalp hardware, tire condition, or deck movement can affect how closely the deck follows the ground.
Check the variables that change deck geometry.
- Compare tire pressure with the mower manufacturer’s specification; unequal pressure changes chassis attitude.
- With the machine fully shut down and secured, visually inspect for obvious deck buildup, damaged blades, loose or missing hardware, and visible impact damage.
- Consider grass height, moisture, mowing speed, and whether the symptom occurs on level ground as well as slopes.
- Confirm deck-height controls are fully seated in the intended position.
Noise and vibration matter as much as the stripe.
Spindle or bearing concern: new growling, roughness, heat, or movement can accompany cut-quality problems.
Impact history: hitting a stump, curb, rock, root, or other solid object can affect blades, spindles, deck components, and alignment.
Drive behavior: if the machine is also pulling, surging, or tracking differently, describe that separately from the deck symptom.
Bring the pattern with the mower.
Photos of the lawn pattern, mower model information, the deck-height setting, and a description of any recent impact or new vibration can make the first conversation more specific. If the cutting edge itself is the concern, review the blade-sharpening service. Do not reach beneath the deck or handle cutting components unless the machine is shut down and secured according to the manufacturer’s instructions.
The Crestwood shop can evaluate deck, drive, steering, vibration, and cutting concerns.