DeWalt DCMWSP256 Lawn Mower Manual

The DeWalt DCMWSP256 is a 56V MAX* Cordless Brushless 21-Inch Self-Propelled Lawn Mower, part of the FLEXVOLT ADVANTAGE system. It features a brushless motor for increased runtime and power, a 21-inch steel deck, 6-position single-lever height adjustment, 2-in-1 mulching and bagging capability, LED headlights, and a weather-resistant construction. Powered by FLEXVOLT batteries (sold separately). Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly & Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Battery & Charging 7. Mowing Operations 8. Maintenance & Storage 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 21-inch steel cutting deck, Brushless motor, FLEXVOLT battery port, 6-position height adjustment lever, 2-in-1 mulch/bag system, LED headlights, Self-propelled drive system with variable speed control.

Feature	Description
Cutting Deck	21-inch steel deck for efficient mowing
Motor	Brushless motor for longer runtime and durability
Power System	FLEXVOLT ADVANTAGE (compatible with 20V MAX* & 60V MAX* batteries)
Height Adjustment	Single-lever, 6-position (1.5" to 4")
Cutting System	2-in-1 mulch and rear bagging (7.5 bushel bag)
Drive System	Self-propelled with variable speed control (0-3.5 mph)
Headlights	Integrated LED lights for low-light conditions
Handle	3-position folding handle for easy storage
Safety Key	Removable key to prevent accidental start
Battery Gauge	On-board fuel gauge to check battery level

Assembly & Setup

Unpack and inspect all contents. Assemble on a flat, stable surface.

Attach the Lower Handle: Secure to deck using provided bolts and wrench.
Attach the Upper Handle: Connect to lower handle, secure knobs.
Install the Bagging System: Attach mulch plug or rear bag assembly as desired.
Install Battery: Insert compatible FLEXVOLT battery into battery port until it clicks.
Adjust Cutting Height: Set lever to desired position (middle setting recommended for first use).

WARNING! Ensure mower is turned OFF and battery is removed during assembly. Tighten all fasteners securely.

First-Time Operation

Before first mow, perform a safety check and familiarize yourself with controls.

Insert Safety Key: Push fully into slot near handle.
Insert Battery: Ensure it is fully charged and securely seated.
Adjust Handle Height: Set to comfortable operating position.
Start Mower: Press and hold safety lever on upper handle, then pull start lever.
Engage Self-Propelled Drive: Squeeze drive control lever to desired speed.
Practice Operation: In a clear area, practice starting, stopping, and speed control.

CAUTION! Clear mowing area of debris, stones, and toys. Wear appropriate safety gear: eye protection, sturdy shoes, long pants.

Specifications

Model: DCMWSP256
Cutting Width: 21 inches
Cutting Height Range: 1.5 - 4 inches (6 positions)
Deck Material: Powder-coated steel
Motor Type: Brushless
Battery System: FLEXVOLT ADVANTAGE (Compatible with 20V MAX* & 60V MAX*)
Drive System: Self-Propelled, Variable Speed (0-3.5 mph)
Bag Capacity: 7.5 bushels (2-in-1 mulch/bag)
Weight (without battery): 68.3 lbs
Warranty: 3-year limited warranty

Controls and Settings

Primary controls located on the upper handle.

Handle Controls: Safety Lever (must be held to operate), Start Lever, Drive Control Lever (variable speed), Height Adjustment Lever, Battery Fuel Gauge.

Settings: Cutting Height (lever positions 1-6, 1=lowest, 6=highest). Mulch/Bag Mode (install mulch plug for mulching, attach bag for collection). Speed Control (variable via drive lever pressure).

Battery & Charging

Use only DeWalt FLEXVOLT batteries and chargers.

Charging: Insert battery into compatible charger. LED indicates status (red=charging, green=complete).
Runtime: Varies based on battery capacity, grass condition, and cutting height.
Storage: Remove battery for long-term storage. Store in cool, dry place.
Battery Gauge: Press button on battery to check charge level (4 LEDs = full).

Tip: For best performance, use a fully charged battery. Have a spare battery ready for larger lawns.

Mowing Operations

For optimal cutting performance and lawn health.

Plan Your Path: Mow in straight, overlapping passes. Change direction periodically.
Adjust Speed: Use variable drive control to match your walking pace and grass thickness.
Cutting Height: Never remove more than 1/3 of grass blade length in a single mow.
Mulching: Use mulch plug for nutrient recycling. Ensure grass is dry and not too tall.
Bagging: Attach bag for clippings collection. Empty when bag is 2/3 full.
Slopes: Mow across slopes, not up and down. Use caution on inclines over 15 degrees.
Shut Down: Release start lever, remove safety key, and remove battery.

WARNING! Always shut off mower and remove battery before clearing blockages, adjusting height, or performing any maintenance.

Maintenance & Storage

Regular maintenance ensures longevity and performance.

After Each Use: Clean underside of deck (remove battery first). Check for loose parts. Wipe down handle.

Blade Care: Inspect blade regularly for damage or dullness. Sharpen or replace as needed (remove battery, disconnect spark plug wire if applicable). Balance blade after sharpening.

End of Season: Thoroughly clean mower. Apply light oil to metal parts to prevent rust. Store in a dry, covered area. Remove battery and store separately at 40-50% charge.

CAUTION! Always disconnect power source before any maintenance. Never touch blade with hands; use a block of wood to secure it.

Regulatory Information

This product complies with applicable ANSI/OPEI standards and U.S. CPSC regulations. Copyright © 2023 DeWalt. DeWalt, the yellow and black color scheme, and FLEXVOLT are trademarks of Stanley Black & Decker, Inc. or its affiliates. For support, visit www.dewalt.com or contact 1-800-4-DEWALT (1-800-433-9258).

Troubleshooting

Symptom	Possible Cause	Corrective Action
Mower won't start	Safety key not inserted, dead battery, safety lever not engaged	Insert safety key fully; charge or replace battery; ensure safety lever is held down.
Poor cutting performance	Dull blade, low battery, cutting height too low, wet grass	Sharpen/replace blade; charge battery; raise cutting height; mow when grass is dry.
Self-propelled drive not working	Drive cable loose, drive control lever not engaged	Check drive cable tension and connection; fully squeeze drive control lever.
Excessive vibration	Damaged or unbalanced blade, loose fasteners, debris in deck	Inspect and balance/replace blade; tighten all bolts/nuts; clean deck underside.
Battery not charging	Faulty charger, dirty contacts, battery temperature extreme	Try different charger; clean battery/charger contacts; allow battery to reach room temperature.

Reset: Remove battery and safety key for 60 seconds to reset electronic controls.

Service: For repairs, use only authorized DeWalt service centers. 1-800-4-DEWALT; www.dewalt.com