Snow Joe MJ409C-RM User Manual
20-Inch Cordless Lawn Mower
20-Inch Cordless Lawn Mower
Model No. MJ408CRM
A Division of Snow Joe®, LLC
IMPORTANT!
Safety Instructions
m WARNING: READ ALL
INSTRUCTIONS BEFORE USE.
Read all instructions when using cordless lawn mowers. Basic
safety precautions should always be followed to reduce the
risk of re, electric shock, and personal injury.
For All Lawn Mowers
1. Avoid dangerous environment. Do not use the mower
in damp or wet locations.
2. Don’t use when it’s raining.
3. Keep children away. All bystanders (visitors) should be
kept at a safe distance from work area.
4. Dress properly. Do not wear loose clothing or jewelry.
They can get caught in moving parts. Use of rubber
gloves and substantial footwear is recommended when
working outdoors. Wear protective hair covering to
contain long hair.
5. Use safety glasses. Always use face or dust mask if
operation is dusty.
6. Use the right mower. Do not use mower for any job
except that for which it is intended.
7. Don’t force mower. It will do the job better and safer
at the rate for which it was designed.
8. Don’t overreach. Keep proper footing and balance at
all times.
9. Stay alert. Watch what you are doing. Use common
sense. Do not operate mower when you are tired.
10. Store idle mowers indoors. When not in use, mowers
should be kept dry and away from children on a high or
locked-up place.
11. Maintain mower with care. Keep cutting edges sharp
and clean for best and safest performance as well
as to reduce the risk of injury. Follow instructions for
lubricating and changing accessories. Keep handles
dry, clean, and free from oil and grease.
12. Check damaged parts. Before further use of the
mower, a guard or other part that is damaged should
be carefully checked to determine that it will operate
properly and perform its intended function. Check for
alignment of moving parts, binding of moving parts,
breakage of parts, mounting, and any other condition
that may affect its operation. A guard or other part that
is damaged should be properly repaired or replaced
Form No. SJ-MJ408CRM-880E
OPERATOR’S MANUAL
by an authorized service center unless indicated
elsewhere in this manual.
13. Keep guards in place and in working condition.
14. Keep blades sharp.
15. Keep hands and feet away from cutting area.
16. Objects struck by the lawn mower blade can cause
severe injuries to people. The lawn should always be
carefully examined and cleared of all objects prior to
each mowing.
17. If lawn mower strikes a foreign object, follow these
steps:
i) Stop lawn mower. Remove the safety key.
ii) Inspect for damage.
iii) Repair any damage before restarting and operating
the lawn mower.
18. Use identical replacement blades only.
Safety Instructions For
Battery-Operated Lawn Mowers
1. Do not charge lawn mower in the rain, or in a wet
location.
2. Do not use battery-operated lawn mower in rain.
3. Remove or disconnect safety key before servicing,
cleaning, or removing material from the lawn mower.
4. Use only the following type and size battery: type
SJ-B17AH; SJ-B18AH; SJ-B20AH, 24V lead acid
battery.
5. Do not dispose of the battery in a re. The cell may
explode. Check with local codes for possible special
disposal instructions.
6. Do not dispose of the battery. Released electrolyte is
corrosive and may cause damaged to the eyes or skin.
It may be toxic if swallowed. Check with local codes for
recycling.
7. Exercise care in handling batteries in order not to short
the battery with conducting materials such as rings,
bracelets, and keys. The battery or conductor may
overheat and cause burns.
m CAUTION
The electrolyte is dilute sulfuric acid that is harmful to the skin
and eyes. It is electrically conductive and corrosive.
The following procedures should be observed:
a) Wear full eye protection and protective clothing.
b) If electrolyte contacts the skin, wash it off
immediately with water.
© 2013 by Snow Joe, LLC
All rights reserved. Original instructions.
SAVE THESE INSTRUCTIONS
1
c) If electrolyte contacts the eyes, ush thoroughly
and immediately with water. Seek medical
attention.
Battery & Charger
m CAUTION: USE ONLY APPROVED REPLACEMENT
BATTERIES, OTHER BATTERIES MAY CAUSE INJURY OR
DAMAGE TO THE MOWER.
The battery that is supplied with this mower is a maintenancefree, sealed, 24V storage battery. It can be tipped without
danger of acid spillage. The charger will require approximately
12 hours to recharge a fully discharged battery.
BATTERY SAFETY RULES
1. Allow at least 12 hours of battery charging before using
the mower for the rst time.
2. For optimal performance, charge the battery every two
months, even when it is not in use.
3. Charge the battery in a cool, dry place.
4. The battery does not have to be fully discharged before
recharging. This battery will not develop a memory.
5. 2 to 3 initial charging/discharging cycles may be
required in order to reach the maximum run time/
capacity.
6. Do not store battery in temperatures lower than 32°F
(0°C).
PROPER CARE FOR BATTERY
Off-Season storage
In order to ensure optimal performance, it is recommended
that the battery be charged every two months when not in use.
If all of the following conditions are met, the mower can be
stored with the charger disconnected.
1. The mower is fully charged before storing.
2. The average temperature of the storage location
is below 50°F (10°C).
3. The battery should not be stored for more than
6 months.
CHARGER SAFETY RULES
Charge the mower battery in a dry area that is protected from
the weather. Do not expose the mower or the charger to rain.
Do not charge the battery in a wet location.
Operate the battery charger in temperatures between 23°
and 104°F (-5° and 40°C). In order to reduce the risk of
electric shock, use only the charger that is provided by the
manufacturer to charge the battery.
DO NOT ABUSE THE CHARGE CORD
• Never carry the charger by the cord. Do not disconnect the
charger from the outlet or from the mower by pulling the
charger cord.
• Do not service the mower with the charger connected or
with the safety key inserted.
• Do not use a damaged charger. Replace the charger cords
or the charger immediately. Keep the mower and the
charger away from water, heat sources (radiators, heaters,
stoves, etc.), ames, and chemicals.
• Do not dispose of this product in re, batteries inside this
product may explode or leak.
IMPORTANT!
Safety Instructions for
Walk-Behind Mowers
GENERAL OPERATION
1. Read, understand, and follow all instructions on the
machine and in the manual(s) before starting.
2. Do not put hands or feet near or under the machine.
Always stay clear of the discharge opening.
3. Only allow responsible adults, who are familiar with the
instructions, to operate this machine.
4. Clear the area of objects such as rocks, wire, toys, etc.,
which could be thrown by the blade. Stay behind the
handle when the engine (motor) is running.
5. Be sure the area is clear of bystanders before
operating. Stop machine if anyone enters the area.
6. Do not operate machine barefooted or while wearing
sandals. Always wear substantial footwear.
7. Do not pull machine backward unless absolutely
necessary. Always look down and behind before and
while moving backward.
8. Never direct discharged material toward anyone. Avoid
discharging material against a wall or obstruction.
9. Do not operate machine without the entire grass
catcher, discharge guard, rear guard, or other safety
protective devices in place and working.
10. Never leave a running machine unattended.
11. Stop the engine (motor) and wait until the blade
comes to a complete stop before cleaning the
machine, removing grass catcher, or unclogging the
discharge guard.
12. Operate machine only in daylight or good articial light.
13. Do not operate machine while under the inuence of
alcohol or drugs.
14. Never operate mower in wet grass.
15. Disengage the drive system, if so equipped, before
starting the engine (motor).
16. If the machine should start to vibrate abnormally,
stop the engine (motor) and check for the cause
immediately. Vibration is generally a warning of trouble.
17. Always wear eye protection when operating machine.
2
SLOPE OPERATION
Slopes are a major cause of slip and fall accidents, which may
result in severe injury. Operation on all slopes requires extra
caution. If you feel uneasy on a slope, do not mow it.
1. Mow across the face of the slope; never up and down.
Exercise extreme caution when changing direction on a
slope.
2. Watch for holes, ruts, bumps, rocks, or other hidden
objects. These may cause an unexpected slip or fall.
3. Do not mow on wet grass or excessively steep slopes.
Poor footing could cause an accident.
4. Do not mow near drop offs, ditches, or embankments.
You could lose your footing or balance.
CHILDREN
Tragic accidents can occur if the operator is not alert to the
presence of children. Children are often attracted to the
machine and the mowing activity. Never assume that children
will remain where you last saw them.
1. Keep children out of the mowing area and under
the watchful care of a responsible adult other than
the operator.
2. Be alert and turn mower off if a child enters the area.
3. Never allow children to operate the machine.
4. Use extra care when approaching blind corners,
shrubs, trees, or other objects that may block your
view of a child.
SYMBOLS
SYMBOLS DESCRIPTIONS
CPSC Danger label
Safety alert
Read the operator’s manual
Severing of toes or ngers-rotary
mower blade
Slip on slope
SERVICE
GENERAL SERVICE
1. Keep all nuts and bolts tightly fastened.
2. Never tamper with safety devices. Regularly check to
ensure they are in place and working properly.
3. Keep the mower free from grass, leaves, or other
debris buildup.
4. If you strike a foreign object, stop and inspect the
machine. Repair, if necessary, before starting.
5. Never make any adjustments or repairs with the engine
(motor) running.
6. Always unplug electric mowers before adjusting,
cleaning, or repairing.
7. Check the grass catcher components and the
discharge guard frequently and replace with
manufacturer’s recommended parts, if necessary.
8. Mower blades are sharp. Wrap the blade or wear
gloves, and use extra caution when servicing them.
9. Maintain or replace safety and instruction decals,
as necessary.
Thrown objects and rotating line
can cause severe injury
Keep bystanders/children away
Wear eye and hearing protection.
For protection against injury wear
ear defenders and safety goggles.
3
Know Your Lawn Mower
Read this owner’s manual and safety rules carefully before operating the mower.
Compare the illustration below to the mower in order to become familiar yourself with the location of
the various controls and adjustments. Save this manual for future reference.
1. Switch
2. Safety Key
3. Hand Grip
4. Power Button
5. Upper Handle
6. Lower Handle
7. Handle Knob
8. Battery
9. Motor Housing
10. Grass Catcher Bag
11. Grass Catcher Hook
12. Battery Plug
13. Chute Cover
14. Height Adjustment Lever
15. Discharge Chute
16. Discharge Cover
17. Wheels
18. Mulch Plug
19. Cable Clip
3
2
1
19
7
10
11
12
13
14
4
5
6
8
R
9
Technical Data
1. Battery Voltage – 24V D.C.
2. Charging Time – 12 hour
3. No load Speed – 3,500/min
4. Cutting Width – 20" (508 mm)
18
15
16
17
5. Cutting Height – 1.75" - 3.75" (45 mm – 95 mm)
6. Grass Catcher Capacity – 15.06 gallons/57 ltrs
7. Wheels Size – 7" (front)/8" (rear)
8. Weight – 90 lbs/41 kg (w/ battery)
57 lbs/26 kg (w/out battery)
4
Fig. 1
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