Cordless Reel Mower
Cordless Reel Mower
Model No. MJ420C
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 in rain.
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 be 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 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 stored indoors in dry, and high or locked-up
place out of reach of children.
11. Maintain mower with care. Keep cutting edge
sharp and clean for best and safest performance and
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
© 2010 by Snow Joe, LLC
All rights reserved. Original instructions.
Form No. SJ-MJ420C-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 rain, or in 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
MJ420CBAT, 12V, 7Ah 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.
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.
c) If electrolyte contacts the eyes, ush thoroughly
and immediately with water. Seek medical
attention.
SAVE THESE INSTRUCTIONS
1
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 directly discharged material toward anyone.
Avoid discharging material against a wall or obstruction.
Material may ricochet back toward the operator. Stop
the blade when crossing gravel surfaces.
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. Always be sure of
your footing; walk; never run.
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.
18. See manufacturer’s instructions for proper operation
and installation of accessories. Only use accessories
approved by the manufacturer.
SLOPE OPERATION
Slopes are a major factor related to slip and fall accidents,
which can 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 slopes; never up and down.
Exercise extreme caution when changing direction on
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 a slip and fall 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.
SERVICE
GENERAL SERVICE
1. Keep all nuts and bolts tight.
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. Check the grass catcher components and the
discharge guard frequently and replace with
manufacturer’s recommended parts, when necessary.
7. Mower blades are sharp. Wrap the blade or wear
gloves, and use extra caution when servicing them.
8. Maintain or replace safety and instruction decals, as
necessary.
2
Know Your Lawn Mower
1. Main Unit
2. Battery Pack
3. Lower Frame
4. Middle Frame x2
5. Upper Frame
6. Short Bolts with Nuts x2
7. Long Bolts with Nuts x4
8. Cable Clips x3
9. Charging Adaptor
10. Keys x2
11. Grass Collector
12. Hex Wrench
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10
2
5
6
4
6
7
7
8
3
11
12
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Technical Data
Unit operating cycle with full battery 25 to 90 minutes*
No load speed 1200 rpm (± 10%)
Cutting width 16 inches / 40 cm
Cutting height 0.75, 1.02, 1.46, 1.69 inches
Battery operating voltage 24V DC
Charging period for fully discharged battery 16 hours
Motor output power 54 W
Battery charger output 28.6V 800mA
Sound Power Level, LWA 94 dB(A)
Sound Pressure Level, LPA 70 dB(A)
Vibration 1.0 m/s
Weight 18.3 Kg (including battery)
* Dependant on grass length and thickness
2
Fig. 1
3
Assembly
1. Fit the Lower Frame onto the two large lugs on the
Main Unit. Fit one side and then ex the other side of
the frame until it ts over the opposite lug. (Fig. 2 and
Fig. 3)
Fig. 2
Fig. 3
Fig. 4
3. Use 4 nuts and 4 long bolts to hold the upper and
middle sections in place on the Lower Frame. Insert
the bolts from the outside and t the nuts on the
inside of the frame. (Fig. 5)
Fig. 5
2. To assemble the Upper Frame to the 2 Middle Frame
parts. Hold the Upper Frame so that the Safety Lever
faces downward, insert the Middle Frame sections so
that they bend outwards and the holes are aligned.
Insert the 2 short bolts from the top so that the nut is
underneath the frame then secure each one. (Fig. 4)
4. Once the frame is assembled, connect the plug on the
handle cable to the socket on the main unit. Tighten
the screw ring to secure the cable. (Fig. 5)
5. Secure the cable to the handle using the 3 cable clips,
leave some slack on the cable to allow free movement.
(See Fig. 1, Pg. 3)
6. To t the Grass Collector position the hooks onto the
rear roller axle of the Main Unit. (Fig. 6)
Fig. 6
Please Note: Open grass collector fully by locking
brackets in a straight position.
4
Safety Key
IMPORTANT!
There is a safety key tted to this device, the product will not
work without it. The key needs to be tted and turned to the
on position for the product to operate. (Fig. 7)
Always remove the key and battery before carrying out any
adjustments or maintenance on the mower, or if the mower is
left unattended.
Fig. 7
NOTE: Before rst use charge the battery for 16 hours. Please
refer to the section on charging and recharging.
Battery
If the battery is damaged in any way do not attempt to
charge it and replace immediately.
1. Remove the battery from the product by rotating and
lifting with the handle. Keep clear of any moisture,
direct sunlight or temperature extremes. Fully unwind
the charger cable, plug into a suitable mains outlet, the
light on the charger will turn green. Fit the plug securely
into the socket on the battery. The light will turn red
while the battery is charging and back to green once
the battery is fully charged. (Fig. 8)
2. To ret the battery, remove the charger lead and lower
it into the cavity on the top of the product in the correct
orientation. If the battery does not t correctly remove
it and check there are no obstructions in the cavity.
Rotate the top handle to the front of the mower to lock
into position. (Fig. 9)
To keep the battery in prime condition it is best to charge
the battery after each use, and every 3 months if stored.
IMPORTANT: Charge the Battery After Each Use.
Fig. 9
Charging Battery
Remove the Battery before charging. Do not attempt to
charge the battery while in the mower.
Never store the mower with a at Battery.
The battery should ideally be stored between 10ºC and
24ºC (50ºF and 75ºF).
Fig. 10
Fig. 8
The battery requires 16 hours to charge fully from at.
Red Light
Unit Charging
The battery will not be damaged if it is charged for longer
than 16 hours, but it is advisable not to leave it on for more
than 48 hours, as this might shorten the battery life. (Fig. 10)
Green Light
Unit Fully Charged
m WARNING
Only use the charger supplied with this product. Do not
attempt to charge this product with any other charger nor
attempt to charge any other product with this charger, as it
5
can cause damage and will invalidate your guarantee.
USE ONLY A REPLACEMENT BATTERY AS SUPPLIED BY
THE MANUFACTURER
Replacement battery can be purchased from: Snow Joe, LLC.
Please call 1-866-766-9563; Email: service@snowjoe.com;
Website: www.snowjoe.com.
Cutting Height
m CAUTION:
For safety ensure that the Safety Key and Battery are
removed from the Mower before adjusting the height.
To ensure that the roller is aligned correctly, it is recommended
that the height is adjusted on a level surface. It is also
recommended that the Grass Collector be removed as this will
allow easier access to the Locking Knobs.
1. Pull out the knobs on both sides of the roller. (Fig 11)
Fig. 11
Battery Level Warning
This mower uses sealed Pb lead acid batteries, which like all
batteries can be damaged if they are over-discharged. The
electronic circuit will warn of low battery level and RED LED
will be on, this indicates that the battery should be recharged
at this point.
GREEN LED ON–Normal operation.
RED LED ON–Battery at, please charge to prevent over
discharge damage.
Blade Adjustment
SHARP BLADES – BE VERY CAREFUL.
m CAUTION:
For safety ensure that the Safety Key and Battery are
removed from the Mower before adjusting the blade.
To adjust the blade turn the 2 bolts on the blade shield. The
cylinder should almost touch the blade, but do not over
tighten it. (Fig.13)
Fig. 13
Locking
Raise
2. Holding both knobs, raise or lower the mower to the
desired height.
3. Allow the knobs to spring into the holes, ensure they sit
fully into the hole, are at the same height and properly
secured.
Fig. 12
Knob Pull Out
Bolt
Cutting Cylinder
If the cylinder hits the blade,
it is too tight and will damage
the cutting edge; loosen
the nuts.
To check for correct
adjustment, insert a piece
of paper between the blade
and the cutting cylinder.
When the cutting cylinder
is turned by hand the paper
should be cut cleanly.
(Fig. 14)
Bolt
Fig. 14
Paper
Blade
Lower
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Electric Lawn Mower
Electric Lawn Mower
Model No. MJ403E
Mowing Tips
Before mowing ensure the area to be cut is clear of stones or
other objects, which may damage the mower or cause injury.
Start by mowing around the edges of your lawn, then cut
the center area in stripes. (Fig. 15) Mow twice a week during
growing season, the grass will be weakened if more than a
third of the length is cut away at one time. The mower should
be parked, the operation lever released and the blades allowed
to stop before the grass collector is removed for emptying.
Do Not Overload the Mower
If you hear the motor in the mower change pitch dramatically
while mowing, it may be overloaded.
If the grass is very thick or long, a rst cut with the cutting
height set higher will help reduce the load on the motor.
(See Cutting Height section on page 6)
Form No. SJ-MJ403E-XXXE
OPERATOR’S MANUAL
Fig. 16
2. Release the operation lever ‘B’ to stop the mower.
(Fig. 17)
Fig. 17
Fig. 15
Emptying the Grass Collector
Before removing the grass box for emptying, release the
operation lever and wait for the blades to stop turning.
1. Lift the basket up and toward the mower to release the
hooks.
2. Lift up and clear of the mower. Always empty clippings
before storage.
3. Replacing the grass collector is the reverse of the
removal process.
Starting & Stopping
The handle is designed with a safety button to prevent
accidental starting.
1. Press and hold the safety button ‘A’ located on the left
of the upper handle, then squeeze the operation lever
‘B’ towards the upper handle. You can now release the
safety button (A) and Start Mowing (Fig. 16)
m IMPORTANT: When releasing the operation lever,
wait for the blades to stop turning before clearing any grass or
putting your hands near the blades!
Over Work Protection
The reset button ‘C’ (Fig.17) on the switch box is to prevent
any damage occurring to the battery or the motor due to a
current overload, such as from the blade jamming. If the load
exceeds its capacity the reset button will pop out and stop the
power supply to protect the mower and blades.
To restart the mower
Ensure the blades are clear of debris, wait for a few seconds,
then press the reset button.
Please Note: Cutting long, thick, or wet grass could overload
the mower or make the blade stall. If the over work protection
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operates then the following actions are recommended:
1. Make a rst higher cut then make a second cut with the
required cutting height.
2. Push the mower more slowly or release the lever and
use the push powered function.
3. Check the blade is correctly adjusted so the grass is
cut cleanly.
Fig. 18
LED lights
FAQ
Why does my mower stop?
Make sure the battery is charged, properly seated and locked
in position. Ensure the key is tted and in the ON position.
The reset button is preventing damage from overload, allow
a few minutes for the mower to cool clear any debris and
resume.
Press the reset button and hold the operation lever up to
restart the mower.
Where should I keep my battery?
The battery should ideally be stored between 10ºC and 24ºC
(50ºF and 75ºF) so the best place would be inside your house
or garage. IMPORTANT: Charge battery after each use.
My lawn is very hard to cut, what can I do?
Cut the grass more often to keep it shorter. Ensure the mower
is maintained correctly. Do a high cut before cutting the grass
short. Ensure blades are adjusted correctly. Charge the battery.
My mower is noisy or won’t cut the grass.
Check the blades are correctly adjusted to give a clean cut.
Environment
When the time comes to dispose of this product please
consider the environment and take it to a recognised recycling
facility instead of disposing with general household waste.
The mower contains a sealed lead acid (Pb) battery which
must be disposed of properly.
Call your local council, civic amenity site, or recycling centre
for information on the recycling and disposal of electrical
products and lead acid (Pb) batteries.
My battery runs out before I nish mowing my lawn.
MJ420C Reel Mower can be used as a push mower if the
battery needs charging or if the grass is very thick.
How can I get my mower repaired if it is damaged?
Please call 1-866-766-9563 for assistance
Where do I nd my serial number?
In front of the main unit and under the battery.
What is your returns policy?
See inside cover of manual.
8
Care and Maintenance
Service and Support
m CAUTION: Remove the key and Battery before
carrying out any maintenance. Do not accidentally turn the
unit on while cleaning it.
• Check for any faults such as loose or damaged blades,
loose ttings and worn or damaged components. Ensure
the mower is in full working order before operating it.
• Check that covers and guards are correctly tted and are
not damaged in any way.
• Carry out any repairs before using the lawn mower again.
• Clean the lawn mower using a soft brush or cloth.
• Do not use abrasive materials to clean the product or
immerse it in water.
• Don’t use on wet ground.
• Don’t allow pieces of string, rope, stones or fabrics to enter
the unit.
• Beware of raised areas such as paving stones or manhole
covers that can damage the blades.
Storage
Before storing, remove the Safety key and Battery. Turn the
machine on its side and clean the blade area. If grass cuttings
are compacted in the blade area, remove with a wooden or
plastic implement. Remove all grass and debris.
• Clean the exterior of the machine thoroughly using a soft
brush or cloth.
• Do not use water, solvents or polish.
• Store the lawn mower in a dry place and oil the blades.
• Do not place other objects on top of the machine.
For storage in conned spaces the handles can be removed
from the mower. Disconnect the power cord and ex the lower
handles to remove from the frame locating lugs.
Never Store the Mower With a Flat Battery. The battery
should ideally be stored between 10ºC and 24ºC (50ºF and
75ºF).
To keep the battery in prime condition it is best to charge
the battery after each use, and every 3 months if stored.
After each use charge for 16 hours to ensure the battery is fully
charged.
If your Lawn Mower requires service or maintenance, please
call 1-866-766-9563 for assistance.
Model and Serial Numbers
When contacting the company or reordering parts, you will
need to provide the model and serial numbers of your product.
These are found on the decal afxed to the housing or handle
of your Cordless Reel Mower. Copy these numbers into the
space provided below.
Record the following numbers from the housing or handle of your
new product:
Model #:
M J 4 2 0 C
Serial #:
IMPORTANT: Charge the battery after each use.
9
A Two-Year Full Warranty
for residential use
in the United States and Canada
General Conditions:
Snow Joe, LLC warrants this product to the original purchaser for two years against defects in material or workmanship when used for
normal residential purposes. Snow Joe, LLC will repair any defect in material or workmanship, and repair or replace any defective part,
subject to the conditions, limitations, and exclusions set forth herein. Such repair or parts replacement will be free from charge to the
original purchaser except noted below.
The duration of the warranty applies only if the product is put to personal use around the household or residence. If the product is put
to any business use, commercial or industrial, then the duration of this warranty is 90 days from the date of original purchase. If any
product is rented or leased, the duration of the warranty is 90 days from the date of original purchase.
It is the owner’s responsibility to perform correctly all maintenance, and minor adjustments explained in the owner’s manual.
Electric Products:
To obtain a replacement electric powered unit or repair the existing electric powered unit, you must return the complete unit and
postage prepaid to: Snow Joe Return Center, 86 Executive Avenue, Edison, NJ 08817.
Gasoline / Battery Products:
Limitations
• Batteries are warranted only for the period of 12 months after the date of purchase on a prorated basis. Rechargeable batteries
will be replaced free from charge during the rst 90 days. After the initial 90 days, batteries will be replaced at prorated cost to
the customer
• Idlers, cables, and electrical components are warranted to the original purchaser for use at household or residence for a period
of two years
Exclusions
• Snow Joe brand engines are covered under this warranty. All other engines and engine accessories are covered only by the
engine manufacturer’s warranty and are not covered by this warranty
• Parts used that are not genuine Snow Joe parts are not covered by this warranty
• Damages resulting from misuse, alteration, improper assembly, improper adjustment, neglect, or accident which requires repair
is not covered under this warranty
• Belts and augers are not covered under warranty – belts and augers wear out and can be purchased at the Snow Joe Center.
Snow Joe, LLC may from time to time change the design of its products. Nothing contained in this warranty shall be construed as
obligating Snow Joe, LLC to incorporate such design changes into previously manufactured products, nor shall such changes be
construed as an admission that previous designs were defective.
This warranty is intended to cover product defects only. Snow Joe, LLC is not liable for indirect, incidental, or consequential damages
in connection with the use of the Snow Joe Products covered by this warranty. This warranty does not cover any cost or expense
incurred by the purchaser in providing substitute equipment or service during reasonable periods of malfunction or non-use of this
product, while waiting for completion of repairs under this warranty. Some states do not allow exclusions of incidental or consequential
damages, so the above exclusions may not apply in all states. This warranty may gives you specic legal rights in your state.
If you wish to contact Snow Joe, please direct inquiries to the:
Customers who have purchased Snow Joe products exported from the United States and Canada should contact their Snow Joe
Distributor (Dealer) to obtain information applicable for your country, province, or state. If for any reason, you are not satised with the
distributor’s service, or if you have difculty obtaining warranty information, contact your Snow Joe seller. If in the event your efforts
are unsatisfactory, please write to the Snow Joe Center at the above address.
If you have any questions about your product warranty, please call 1-866-SNOW-JOE or visit us online at www.snowjoe.com.
Customer Service Department
Snow Joe Center
86 Executive Avenue
Edison, NJ 08817
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