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Where can I find basic troubleshooting information for walk-behind lawn mowers?
Murray Admin Updated on May 26, 2026
General
NOTE: Before attempting any of the following repairs, shut off engine and disconnect spark plug.
| Complaint | Possible Cause | Correction |
|---|---|---|
| Excessive vibration |
Blade is loose Blade is unbalanced Bent blade Engine mounting bolt loose or missing Bent or broken crankshaft |
Tighten blade (see Operator's Manual) Balance blade (see Operator's Manual or Murray Service Dealer) Replace blade (see Operator's Manual) Tighten or replace bolt (see Operator's Manual)
|
| Uneven cut |
Height adjusters are not set correctly Dull blade Bent blade |
Place all four wheels in same height position Sharpen and balance blade (see Operator's Manual) Replace blade (see Operator's Manual) |
| Unit does not shut off when stop lever is released |
Damaged stop cable Damaged stop cable |
Replace cable (see Operator's Manual) Replace stop lever (see Murray Service Dealer) |
Self-Propelled Walk-Behind Mowers
NOTE: Before attempting any of the following repairs, shut off engine and disconnect spark plug.
| Complaint | Possible Cause | Correction |
|---|---|---|
| Unit fails to drive when lever is engaged |
Cable out of adjustment Cable damaged Belt worn or damaged Belt not routed correctly |
*Adjust cable (see Operator's Manual) Replace cable (see Operator's Manual or Murray Service Dealer) Replace belt (see Operator's Manual)
|
| Drive will not disengage | Incorrect belt tension
Incorrect cable tension |
**Adjust belt tension (see Operator's Manual)
|
| Noisy drive system |
Caused by debris Damaged wheels Bent height adjusters |
Remove debris from drive components (see Operator's Manual) Replace wheels (see Operator's Manual or Murray Service Dealer) Replace height adjusters (see Operator's Manual or Murray Service Dealer) |
* Not all models have a cable adjustment. Replace cable if there is no cable adjustment.
** Not all models have a belt adjustment. Replace belt if there is no belt adjustment.
Please read and abide by any applicable Safety Information contained in your product Operator's Manual. The material provided above is not intended to replace work performed by a Murray Authorized Dealer. Terms of Use apply to all of the information presented on this website. Always be sure to completely read and understand your product Operator's Manual.