Brand: BLACK & DECKER
Category: Lawn Mower
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for MM275
Uploaded: April 20, 2026, 7:54 p.m.
Manual Publish Date: 2005-07-01
Warranty Information
2-year full home use warranty against defects in material or workmanship for the product; lifetime warranty for the deck.
- Inspect the cutting area for foreign objects.
- Attach the extension cord to the mower.
- Connect the extension cord to the electrical outlet.
- Start the mower using the special switch.
- Mow in a back-and-forth manner, keeping the cord clear.
- Adjust wheel height for desired cutting level.
- Mulching: The mower recuts clippings into short lengths for biodegradation and nutrients.
- Discharging: The mower disperses clippings back to the lawn.
- Optional grass bag available for collecting clippings.
- Clean and store the mower after use, ensuring it is unplugged and dry.
Troubleshooting and error codes
| PROBLEM | CORRECTIVE ACTION |
| Motor will not start | • Check fuse or circuit breaker to ensure power is to outlet • Check extension cord with another electrical device to ensure cord is good. • Call customer service representative 1-800-54-HOW-TO |
| Motor keeps slowing down | • The underside of the mower may be plugged with clippings, UNPLUG mower and clean out. • Grass may be too tall, try pushing at a slower pace, or raise cut height. • Check blade sharpness and balance, and correct if required. • If mulching, it may be too much grass, UNPLUG mower and attach discharge chute to disperse grass |
| Runs but poor cut results | • The blade may be dull, unplug mower and carefully check for sharpness. • Blade may be damaged (bent or badly chipped), UNPLUG mower and replace if necessary. • Grass may be too high or thick for cutting height, UNPLUG mower and raise cutting height. |
| Excess vibration | • Blade may be loose, UNPLUG mower and check blade for tightness. • Blade may be bent or badly chipped, UNPLUG mower and replace if necessary. • Blade may be unbalanced. Refer to blade balancing section of instruction manual. |
| Mower is hard to push | • Mower is too close to the ground with the amount of grass being cut, UNPLUG mower and raise cutting height. • UNPLUG mower and check wheels and axles to ensure all are rotating easily. |
| Mower leaves clumps of grass | • Too much grass, UNPLUG mower and raise cutting height. • If mulching, it may be too much grass, UNPLUG mower and attach discharge chute to disperse grass • UNPLUG mower and carefully check blade for sharpness. |
| Discharge/Bag plugging | • Grass may be too wet to cut. Wait for grass to dry. • Grass may be too wet, try again when grass is dry. • Too much grass, UNPLUG mower and raise cutting height. |