PRODUCT CAI Troubleshooting EXCESSIVE VIBRATION 4. Cutting blade loose or unbalanced. a. Tighten blade and spindle, 2. Damaged or bent cutting blade, a Replace blade, UNEVEN CUT | 1. Dec knot propel leveled. Perform side-to-side deck adjustment. 2. Cutting blade dull or damaged. «+ Sharpen or replace cutting blade. 3. Uneven thee pressure. «Check and correct tire pressure in all four tires, Figure 39 MOWER WILL NOT MULCH GRASS. 9. Remove the blade from the front spindle assembly (i).