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Manual DeWalt DW12A-O1T9739 Lawn Mower

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Manual

6. Regularly check the safety interlock system for

proper function, as described later in this manual.

If the safety interlock system does not function

properly, have your mower serviced professionally

by an authorized service dealer.

7. Never tamper with the blade control safety interlock

or other safety devices. Check for proper operation

per the Service and Maintenance section.

8. Check the mower blade and engine mounting

bolt torque in accordance to the Service and

Maintenance section in this manual. Also, visually

inspect blade for damage (e.g., excessive wear,

bent, cracked). Replace the blade with the original

equipment manufacturer’s (O.E.M.) blade only.

9. Use of service parts which do not meet the original

equipment specifications may lead to improper

performance and compromise safety.

10. Keep all nuts, bolts, and screws tight to be sure the

equipment is in safe working condition. Check

all hardware for tightness per the Service and

Maintenance section.

11. After striking a foreign object, stop the engine,

disconnect the spark plug wire(s) and ground

against the engine. Thoroughly inspect the mower

for any damage. Repair the damage before starting

and operating

12. Never attempt to make wheel cutting height

adjustments or repairs to the mower while the

engine is running.

13. Grass catcher components and the discharge

cover are subject to wear and damage which

could expose moving parts or allow objects to be

thrown. For safety protection, frequently check

components and replace immediately with original

equipment manufacturer’s (O.E.M.) parts only. “Use

of parts which do not meet the original equipment

specifications may lead to improper performance

and compromise safety.”

14. Maintain or replace safety and instruction labels,

as necessary.

15. Observe proper disposal laws and regulations for

gas, oil, etc. to protect the environment.

Notice Regarding Emissions

Engines which are certified to comply with

California and federal EPA emission regulations

for SORE (Small Off Road Equipment) are certified

to operate on regular unleaded gasoline, and may

include the following emission control systems:

Engine Modification (EM) and Three Way Catalyst

(TWC) if so equipped.

When required, models are equipped with

low permeation fuel lines and fuel tanks for

evaporative emission control. California models

may also include a carbon canister. Please contact

Customer Support for information regarding the

evaporative emission control configuration for

your model.

Spark Arrestor

WARNING: This mower is equipped with an

internal combustion engine and should not

be used on or near any unimproved forest-

covered, brush-covered or grass-covered land

unless the engine’s exhaust system is

equipped with a spark arrestor meeting

applicable local or state laws (if any).

If a spark arrestor is used, it should be maintained

in effective working order by the operator. In the

State of California the above is required by law

(Section 4442 of the California Public Resources

Code). Other states may have similar laws. Federal

laws apply on federal lands.

A spark arrestor for the muffler is available through

your nearest engine authorized service dealer or

contact the service department, P.O. Box 361131

Cleveland, Ohio 44136-0019.

Slope Gauge (Back Cover)

WARNING: Slopes are a major factor related

to slip and fall accidents which can result in

severe injury or death. All slopes require

extra caution. If you feel uneasy on the slope,

do not mow it. Do not mow on slopes greater

than 15 degrees (25%). Only mow across

slopes, never mow up and down slopes.

USE THE SLOPE GAUGE ON THE BACK COVER AS

SHOWN TO DETERMINE IF A SLOPE IS TOO STEEP

FOR SAFE OPERATION!

To check the slope, proceed as follows:

1. Open manual to page and fold along the

dashed line.

2. Locate a vertical object on or behind the slope (e.g.

a pole, building, fence, tree, etc.)

3. Align either side of the slope gauge with the object.

4. Adjust gauge up or down until the left corner

touches the slope.

5. If there is a gap below the gauge, the slope is too

steep for safe operation.

SAFE OPERATION PRACTICES, cont'd

Download manual in English (PDF, 2.29 MB)

(Consider the environment and only print this manual if it is really necessary)

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WILLIE 26-07-2025
Main discharge back cover came off, any manual, video i can use to replace cover? Unable to get springs to engage to return cover to close position.

reply | This was helpful (0)

More about this manual

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Specifications

Brand	DeWalt
Model	DW12A-O1T9739
Category	Lawn Mowers
File type	PDF
File size	2.29 MB

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Frequently Asked Questions about DeWalt DW12A-O1T9739 Lawn Mower

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

How do I know when to sharpen the blades of my lawn mower? Verified

Sharp blades cleanly cut the grass. Dull blades roughly tears the grass which will quikly turn brown. If the lawn mower produces teared grass, then the blades should be sharpened or replaced.

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What is mulching? Verified

Some lawn mowers are able to mulch. Mulching finely shreds the grass and blows it back to the lawn. There the mulch functions as nutrition and protection for the grass.

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I accidentally put diesel in my petrol lawn mower, what should I do? Verified

Do NOT use the lawn mower. The only option is to completely empty the tank and fill it with the right fuel.

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What is the best lenght for my grass? Verified

To prevent the grass from drying out it should not be too short. It's better to mow the grass more often than to cut it too short. The optimal length it between 3 and 4 centimeter.

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Can I mow grass when it's wet? Verified

It is possible, but not advisable. When grass is wet it will lump together during mowing, preventing an optimal result.

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What is the right moment to mow my lawn? Verified

The best months for lawn mowing are March to October. Mowing should be done once or twice a week depending on how fast the grass grows. The best time of day to mow the grass is at the end of the afternoon and never in full sunlight. This is to prevent the grass from drying out after being cut.

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Can I let a robot mower work in the night? Verified

It's better not to let a robot mower work in the night. Some animals, like hedgehogs, are mostly active at night. They are often not quick enough to escape from the robot mower and can get severely wounded or killed.

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