sunjoe AJ798E-RM User manual

© 2021 by Snow Joe®, LLC
All rights reserved. Original instructions. SAVE THESE INSTRUCTIONS
1
A Division of Snow Joe®, LLC Model AJ798E-RM Form No. SJ-AJ798E-RM-880E-M-V1
ELECTRIC LAWN SCARIFIER
+ DETHATCHER
12.6-INCH | 12-AMP
R
OPERATOR’S MANUAL

© 2021 by Snow Joe®, LLC
All rights reserved. Original instructions. SAVE THESE INSTRUCTIONS
2
A Division of Snow Joe®, LLC Model AJ798E-RM Form No. SJ-AJ798E-RM-880E-M-V1
ELECTRIC LAWN SCARIFIER
+ DETHATCHER
12.6-INCH | 12-AMP
R
OPERATOR’S MANUAL
IMPORTANT!
Safety Instructions
All Operators Must Read These
Instructions Before Use
Always follow these safety guidelines. Failure to do so may
result in serious bodily injury or death.
General Safety WARNINGS!
When using this electric scarier + dethatcher, basic safety
precautions should always be followed to reduce the risk of
re, electric shock and personal injury.
Before using the scarier + dethatcher, take the time to
familiarize yourself with the controls, especially how to stop
the machine in an emergency. The only individuals who should
use the scarier + dethatcher are those who have a thorough
understanding of the instructions and who know how to
operate the machine. Children should never be allowed access
to the scarier + dethatcher.
Retain this manual for future reference and reread it at the start
of each dethatching session.
General Safety
1. Keep work area clean and well-lit – Cluttered, dark
areas invite accidents.
2. Replacement parts – When servicing this unit, use only
identical replacement parts. Replace or repair damaged
cords immediately.
3. Keep children, bystanders, and pets away – All
spectators, including pets, should be kept a safe distance
away from the work area.
4. Dress properly – Do not wear loose clothing or jewelry
as such articles can get caught in moving parts. Wear a
protective covering to contain long hair. Wearing rubber
gloves and substantial non-slip footwear is recommended
when working outdoors.
5. Avoid accidental starting – Do not carry the scarier +
dethatcher with your nger on the switch. Make sure the
switch is o before plugging in the unit.
6. Do not force the tool – It will perform better with less
likelihood of personal or mechanical injury if it is used at
the rate for which it is designed.
7. Wear personal protective equipment – When using this
tool, wear safety glasses with side shields or goggles to
provide necessary eye protection. Wear ear defenders to
prevent hearing damage. Use a face or dust mask if the
work environment is dusty.
8. Disconnect the tool – Disconnect the scarier +
dethatcher from the power supply when it is not in use,
before servicing it, when changing accessories, and when
performing any other maintenance task.
9. Store idle tool indoors – When not in use, the scarier +
dethatcher should be stored indoors in a dry and high or
locked-up place out of the reach of children.
10. Maintain the scarier + dethatcher with care – Keep
cutting edges sharp and clean for optimal and safest
performance.
Inspect the scarier + dethatcher cord periodically and
if damage is found have it repaired by an authorized
service facility. Extension cords should also be inspected
periodically and immediately replaced if damaged. Keep
handles dry, clean and free from oil and grease.
11. Use the right tool – Do not use the tool for any job except
that for which it is intended.
12. Avoid dangerous environments – Do not use the
scarier + dethatcher in rain, damp, or wet locations.
13. Stay alert – Watch what you are doing. Use common
sense. Do not operate the scarier + dethatcher when you
are tired or under the inuence of drugs, alcohol, or other
medication.
14. Do not overreach – Keep proper footing and balance at
all times.
15. Check Damaged Parts – Before further use of the
appliance, 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 aect its operation. A guard or other part that
is damaged should be properly repaired or replaced.
Contact the Snow Joe® + Sun Joe®customer service
center at 1-866-SNOWJOE (1-866-766-9563) for
assistance.

3
Double-Insulated Appliances
In a double-insulated appliance, two systems of insulation
are provided instead of grounding. No grounding means
that it is already provided on a double-insulated appliance.
Servicing a double-insulated appliance requires extreme care
and knowledge of the system, and should be performed only
by qualied service personnel at an authorized Snow Joe® +
Sun Joe®dealer. Replacement parts for a double-insulated
appliance must be identical to the parts they replace. A
double-insulated appliance is marked with the words “Double
Insulation” or “Double Insulated.” The symbol (square
within a square) may also be marked on the appliance.
DOUBLE-INSULATED: GROUNDING NOT
REQUIRED. WHEN SERVICING, USE ONLY
IDENTICAL REPLACEMENT PARTS.
This electric scarier + dethatcher is double-insulated,
eliminating the need for a separate grounding system. Use
only identical replacement parts. Read the instructions before
servicing double-insulated appliances. Use this electric
scarier + dethatcher only as described in this manual.
Electric Safety
1. Ground fault circuit interrupter (GFCI) protection should
be provided on the circuit(s) or outlet(s) to be used for the
dethatcher. Receptacles are available having built-in GFCI
protection and may be used for this measure of safety.
2. To prevent electric shock, use only with an extension cord
suitable for outdoor use, such as SW-A, SOW-A, STW-A,
STOW-A, SJW-A, SJOW-A, SJTW-A, or SJTOW-A.
Before use, check that the extension cord is in good
condition. When using an extension cord, make sure to
use one heavy enough to carry the current your product
will draw. An undersized cord will cause a drop in line
voltage resulting in loss of power and overheating.
3. To reduce the risk of electric shock, this appliance has
a polarized plug (i.e. one blade is wider than the other).
Use this appliance only with a polarized, UL-listed (CSA
certied in Canada) extension cord recommended for
outdoor use. The appliance plug will t into a polarized
extension cord only one way.
If the appliance plug does not t fully into the extension
cord, reverse the plug. If the plug still does not t, obtain
a correct polarized extension cord. A polarized extension
cord will require the use of a polarized wall outlet. The
extension cord plug will t into the polarized wall outlet
only one way. If the plug does not t fully into the wall
outlet, reverse the plug. If the plug still does not t,
contact a qualied electrician to install the proper wall
outlet. Do not modify the appliance plug, extension cord
receptacle or extension cord plug in any way.
4. To prevent the appliance cord from disconnecting from the
extension cord during operation, make a knot with the two
cords as shown in Table 1.
Extension Cord
Length
Wire Gauge (A.W.G.):
Up to 50 ft
(15 m)
+50 ft - 100 ft
(+15 m - 30 m)
14 12
mWARNING m
Electric shock may cause SEVERE INJURY or
DEATH. Heed these warnings:
• Do not allow any part of the electric scarier +
dethatcher to make contact with water while it is in
operation. If the appliance becomes wet while turned
o, wipe dry before starting.
• Use only a UL-, CSA-, or ETL-rated extension cord for
outdoor, all-weather use, such as the Snow Joe®+
Sun Joe®SJTW-A 14-gauge 50-foot extension cord
with lighted end (Model PJEXT50-B). Visit sunjoe.com
to purchase this extension cord online or, to order by
phone, call 1-866-SNOWJOE (1-866-766-9563).
• Do not use an extension cord over 100 ft (30 m).
• Do not touch the appliance or its plug with wet hands
or while standing in water. Wearing rubber boots
oers some protection.
EXTENSION CORD CHART

4
5. Do not abuse the cord. Never pull the dethatcher by the
cord or yank the cord to disconnect it from the receptacle.
Keep the cord away from heat, oil and sharp edges,
especially the rotating tines. Position the cord so that it
will not get caught on lumber, tools or other obstructions
while working with the dethatcher. Failure to heed these
warnings can result in serious personal injury.
IMPORTANT!
Safety Instructions for Walk-Behind
Scarier + Dethatchers
General Operation
• Read, understand and follow all instructions on the
machine and in the manual(s) before starting.
• Thoroughly inspect the area where the equipment is to be
used and remove all foreign objects.
mWARNING! Foreign objects in the work area can be
picked up by the scarier + dethatcher and launched into your
eyes, which can result in severe personal injury. In addition
to surveying the area and removing foreign objects before
beginning work, always wear safety goggles or safety glasses
with side shields and, when necessary, a full face shield.
• Use the electric scarier + dethatcher only in daylight or
good articial light.
• Do not operate the equipment without wearing adequate
outer garments. Wear protective footwear that will improve
footing on slippery surfaces.
• Use extension cords and receptacles as specied by the
manufacturer for all units with electric drive motors or
electric starting motors (see extension cord chart
on page 3).
• Never attempt to make any adjustments while the motor is
running.
• Never operate the scarier + dethatcher in wet grass.
Always be sure of your footing; walk, never run, with the
machine.
• Do not put hands or feet near or under rotating parts.
• Exercise extreme caution when operating on or crossing
gravel drives, walks or roads. Stay alert for hidden hazards
or trac.
• Exercise caution to avoid slipping or falling.
• Stop the motor and disconnect the power supply when
leaving the operating position, before unclogging the tines
and when repairing, adjusting, inspecting or performing
any other maintenance on the machine.
• Take all necessary precautions when leaving the machine
unattended. Stop the motor and remove the power cord.
• Before cleaning, repairing or inspecting the unit, shut o
the motor, disconnect the power supply and wait until all
moving parts have come to a complete stop.
• Never operate the machine without proper guards, plates
or other safety protective devices in place and in proper
working order.
• Keep children and pets away.
• Do not overload the machine capacity by attempting to
dethatch too deep at too fast a rate.
• Never operate the machine at high transport speeds on
hard or slippery surfaces.
• Never allow bystanders near the unit when operating.
• Use only attachments and accessories approved by the
manufacturer of the machine.
• Never operate the machine without good visibility or light.
• Be careful when cultivating in hard ground. The tines may
catch in the ground and propel the machine forward. If
this occurs, let go of the handlebars and the starting lever
and do not restrain the machine.
• Use extreme caution when reversing or pulling the
machine towards you.
• Stop the tines if the machine has to be tilted for
transportation. Do not operate the tines when crossing
surfaces other than grass, and when transporting the
product to and from the working area.
• Do not tilt the machine when switching on the motor,
except if the product has to be tilted for starting. In this
case, do not tilt it more than absolutely necessary and lift
only the part which is away from the operator.
• Do not start the motor when standing in front of the
discharge opening.
• Switch on the motor carefully according to the instructions
and keep your feet clear of the rotating tines.
• Never pick up or carry the machine while the motor is
running.
• Stop the motor and disconnect the machine from the
power supply:
– before clearing blockages or unclogging the discharge
opening;
(B) Connect plug and receptacle
Cord set Appliance cord
(A) Tie cord as shown
Table 1. Method of Securing Extension Cord

5
– before checking, cleaning or working on the machine;
– after striking a foreign object. Inspect the machine for
damage and make repairs before restarting and
operating the machine;
– if the machine starts to vibrate abnormally (check
immediately).
– whenever you leave the machine.
• Never use the scarier + dethatcher without the thatch
collection bag securely tted.
• WARNING! Beware of sharp tines. Tines continue to
rotate after the motor is switched o.
Slope Operation
Slopes are major factors 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
dethatch it.
• Dethatch across the face of slopes; never dethatch slopes
following an up and down traverse. Exercise extreme
caution when changing direction on a slope.
• Watch for holes, ruts, bumps, rocks or other hidden
objects. These may cause an unexpected slip or fall.
• Do not dethatch on wet grass or excessively steep slopes.
Poor footing could cause a slip and fall accident.
• Do not dethatch near drop os, ditches or embankments.
You could lose your footing or balance.
Children Safety
Tragic accidents can occur if the operator is not alert to the
presence of children. Children are often attracted to the
machine and the dethatching activity. Never assume that
children will remain where you last saw them.
• Keep children out of the dethatching area and under
the watchful care of a responsible adult other than the
operator.
• Stay alert and turn the dethatcher o if a child enters the
area.
• Never let children operate the machine.
• Use extra care when approaching blind corners, shrubs,
trees or other objects that may block your view of a child.
Vibration + Noise Reduction
To reduce the impact of noise and vibration emission, limit the
time of operation, use low-vibration and low-noise operating
modes as well as wear personal protective equipment. Take
the following points into account to minimize the vibration and
noise exposure risks:
• Only use the product as intended by its design and these
instructions.
• Ensure that the product is in good condition and well
maintained.
• Use correct application tools for the product and ensure
they are in good condition.
• Keep tight grip on the handles/grip surface.
• Maintain this product in accordance with these
instructions and keep it well lubricated (where
appropriate).
• Plan your work schedule to spread any high vibration tool
use across a number of days.
Residual Risks
Even if you are operating this product in accordance with all
the safety requirements, potential risks of injury and damage
remain. The following dangers can arise in connection with the
structure and design of this product:
• Health defects resulting from vibration emission if the
product is being used over long periods of time or not
adequately managed and properly maintained.
• Injuries and damage to property due to broken application
tools or the sudden impact of hidden objects during use.
• Danger of injury and property damage caused by ying
objects.
mWARNING! This product produces an electromagnetic
eld during operation! This eld may under some
circumstances interfere with active or passive medical
implants! To reduce the risk of serious or fatal injury, we
recommend persons with medical implants to consult their
doctor and the medical implant manufacturer before operating
this product!

6
Safety Symbols
The following table depicts and describes safety symbols that may appear on this product. Read, understand and follow all
instructions on the machine before attempting to assemble and operate.
Thrown objects picked up by the
rotating tines can cause severe
injury.
Use extreme CAUTION when
reversing or pulling the machine
towards you.
SAFETY ALERT – Indicates a
precaution, a warning, or a danger.
READ THE OPERATOR'S
MANUAL(S) – Read, understand,
and follow all instructions in the
user manual(s) before attempting to
assemble and operate.
WARNING! Do not expose the unit
to rain or wet conditions.
WEAR EYE AND HEARING
PROTECTION – For protection
against injury, wear ear defenders
and safety goggles.
DANGER! Rotating blades – Keep
hands and feet away from moving
parts.
Wear protective gloves and
non-slip footwear when using
the machine and handling debris.
SWITCH OFF! Remove plug from
outlet before cleaning or conducting
maintenance checks.
Inspect the work area prior to use
and remove all objects that could be
thrown by the appliance. If a hidden
object is discovered while working,
stop the engine and remove the
object.
Keep bystanders a safe
distance away from the work
area.
SWITCH OFF! Remove plug from
outlet immediately if the cord is
damaged or cut.
Do not push down stairs. Keep hands and feet away from the
rotating parts.
Double Insulation.
Symbols SymbolsDescriptions Descriptions

7
Know Your Electric Scarier + Dethatcher
Read the owner’s manual and safety instructions carefully before operating the scarier + dethatcher. Compare the illustration
below to the dethatcher in order to familiarize yourself with the location of the various controls and adjustments. Save this
manual for future reference and reread it prior to each dethatching session.
BOTTOM
1
2
34
5
67
8
9
10
12
13
14
15
16
17
18
19
20
1. Upper handle frame
2. Upper handle knobs + bolts (2)
3. Middle handle bars (2)
4. Lower handle knobs + bolts (2)
5. Lower handle bars (2)
6. Ejector ap
7. Locking bolts (2)
8. Bearing seat
9. Scarifying cylinder
10. Dethatcher cylinder
11. Hex key wrench
12. Front wheel (2)
13. Rear wheel (2)
14. Scarifying/raking depth
adjustment lever
15. Thatch collection bag
16. Cable clips (2)
17. Appliance cord
18. Switch box
19. Safety lock button
20. Switch lever
11

8
Technical Data
Rated Voltage ..................................................... 120 V ~ 60 Hz
Motor ............................................................................. 12 amp
No Load Speed ......................................................... 3000 rpm
Raking Width Max ......................................... 12.6 inch (32 cm)
Scarifying Depth†........................................... -0.4 inch – 0 inch
(-10 mm – 0 mm)
Raking Depth†................................................. 0 inch – 0.2 inch
(0 mm – 5 mm)
Depth Adjustment .................................................... 4-position
Thatch Bag Capacity ............................................... 8 gal (30 L)
Dethatcher Cylinder ........................ 21 spring steel raking tines
1.5 mm thick + 1.2 inch (30 mm) long
Scarier Cylinder ............................................ 22 slicing blades
5.1 inch (130 mm) long
Wheel Size ..................................................... 8 in. (20 cm) front
4 in. (10 cm) rear
Net Weight .......................................................... 21 lbs (9.6 kg)
†The negative scarifying/raking depth indicates that the tines/blades are raking
below the horizon (i.e. penetrating the soil layer).
Unpacking
Carton Contents
• Scarier + dethatcher
• Handle knobs and bolts (4)
• Phillips screws (2)
• Upper handle frame
• Middle handle bars (2)
• Lower handle bars (2)
• Thatch collection bag
• Switch box
• Cable clips (2)
• Hex key wrench
• Scarifying cylinder (Pre-assembled)
• Dethatcher cylinder
• Manual and registration card
1. Carefully remove the electric scarier + dethatcher and
check to see that all of the above items are supplied.
2. Inspect the product carefully to make sure no breakage or
damage occurred during shipping. If you nd damaged or
missing parts, DO NOT return the unit to the store. Please
call the Snow Joe® + Sun Joe®customer service center at
1-866-SNOWJOE (1-866-766-9563).
NOTE: Do not discard the shipping carton and packaging
material until you are ready to use the electric scarier
+ dethatcher. The packaging is made of recyclable
materials. Properly dispose of these materials in
accordance with local regulations or save the packaging
for long-term product storage.
IMPORTANT! The equipment and packaging material are
not toys. Do not let children play with plastic bags, foils,
or small parts. These items can be swallowed and pose a
suocation risk!
Assembly
mWARNING! Do not connect the scarier + dethatcher to
the power supply until assembly is complete. Failure to comply
could result in accidental starting and severe personal injury.
Always wear gloves during assembly.
Connecting the Handle Bars
1. Insert the lower handle bars into the motor housing and
secure it with the two Phillips screws (Figs. 1 & 2).
R
Fig. 1
Lower handle
bars
Motor housing

9
2. Secure the two middle handle bars to the lower handle
bars using the rst set of knobs and bolts. Tighten the
knobs on each side to ensure a secure t (Fig. 3).
3. Slide the switch box on the left side of the upper handle
frame until it clicks and locks in position (Fig. 4).
4. Connect the upper handle frame to the middle handle
bars using the second set of knobs and bolts. Tighten the
knobs on each side to ensure a secure t (Fig. 5).
5. Fix the cord with cord clips to the middle and lower
handle bars (Fig. 6).
Thatch Collection Bag Assembly
mWARNING! Do not attempt to use the product without
the thatch collection bag attached. This could pose a danger
of ying debris.
mWARNING! The product must be switched o and the
cutting device must have stopped rotating before you attach or
empty the thatch collection bag.
mWARNING! Never use the scarier without the thatch
collection bag securely tted.
NOTE: A full thatch collection bag will reduce the performance
of this product.
Fig. 2
Phillips screws
Fig. 3
Lower handle
bars
Middle
handle
bars
Lower handle
knob + bolt
Switch
box
Fig. 4 Upper handle
frame
Fig. 5
Middle handle
bars
Upper handle
knob + bolt
Upper handle
frame
Fig. 6
Cable clips

10
Attach the thatch collection bag to the lawn scarier +
dethatcher before operation.
1. Lift the ejector ap, and hang the thatch collection bag to
the mounting hooks (Fig. 7).
Removing + Emptying the Thatch
Collection Bag
Empty the thatch collection bag frequently during use. Do not
wait until it is completely full. We recommend emptying it when
it is half full.
1. Lift the ejector ap and pull the thatch collection bag o
the mounting hooks to remove it.
2. Empty the bag's contents into a suitable waste receptacle.
Mount the bag back into position before resuming work.
Intended Use
1. This scarier + dethatcher is designated with a 12 amp
motor. Depending on the tted cutting device, this
machine is either intended for scarifying and removing
thatch from lawns or raking in domestic and hobby
gardens.
2. When used as a scarier, this machine works by
scratching through and between the grass with specially
adapted prongs that collect and remove any unwanted
parts from the lawn while leaving the grass blades intact.
At the same time the machine scaries the ground
resulting in a better aeration.
3. When used as a dethatcher the ne needles will scratch the
surface of the lawn while simultaneously picking up light
debris for better oxygen absorption, airing and drainage.
4. This machine is not to be used in wet weather conditions
and may not be used to mow dry, wet or unusually high
grass, e.g., pasture grass or for shredding leaves.
5. This machine is intended for private domestic use only,
not for any commercial trade use. It must not be used for
any purposes other than those described.
Operation
Cutting Depth Adjustment
mWARNING! The unit must be switched o and
disconnected from the power supply before adjusting the
tine settings.
Adjust the depth according to the needs of your lawn. The
most suitable depth depends on the kind of lawn and the
actual height of the grass.
1. Pull the depth adjustment lever away from the wheel, then
move it forward or backward to adjust the cutting depth
(Fig. 8).
2. Adjust the lever to one out of the four stages. Read the
adjusted depth from the scale.
Power Connection
Push a loop of the extension cord through the slot on the
switch box from the opposite side of the switch box (Fig. 9).
Insert the appliance cord into a proper outdoor extension cord
(see Extension Cord Chart on page 3).
R
Mounting hook
Fig. 7
Ejector ap
R
R
Fig. 8
Depth adjustment
lever
Pull out Adjust
Minimal For raking healthy lawn. Do not
use for scarifying.
Middle For transport, storage, scarifying
and raking.
Deep
Deep
Setting Depth Application
5 mm
0 mm
-5 mm
-10 mm
For scarifying, not
recommended for raking.
For scarifying, do not use
for raking.

11
Starting + Stopping
mWARNING! Before switching on the lawn scarier +
dethatcher, make sure that it is not in contact with any foreign
objects. Keep your feet and hands a safe distance away from
the rotating tines and the ejector opening. Failure to comply
with these warnings can result in severe personal injury.
1. To start, press and hold the safety lock button while
pulling the switch lever toward you. Once the machine
powers on, release the safety lock button and proceed
with operation (Fig. 10).
2. To stop the lawn scarier + dethatcher, release the switch
lever.
mWARNING! The tine cylinder continues to run for a
brief period after the unit has been switched o. Do not tilt or
carry the unit while the motor is still running and do not touch
the cylinder while it is still rotating. Failure to comply could
result in severe personal injury.
Overload Protection
The overload protection will be activated in the following
circumstances:
1. A build up of scaried material around the cutting device.
2. If the material scaried is larger than the motor capacity.
3. Where there is too much resistance against the cutting
device.
When the circuit breaker has been activated switch o the
product and disconnect from the power supply.
Let the product cool down and eliminate the cause before
using the product again.
General Operation
mWARNING! If the product strikes a foreign object stop
the motor. Switch the product o, disconnect it from the power
supply and let it cool down. Inspect the product thoroughly for
damage. Have any damage repaired before restarting.
mWARNING! Extensive vibration of the product during
operation is an indication of damage. The product should be
promptly inspected and repaired.
• Check the machine, its power cord and plug as well as
accessories for damage before each use. Do not use the
machine if it is damaged or shows wear.
• Double check that accessories are properly xed.
• Push the machine forward by its handle. Keep the handle
dry to ensure safe support.
• Ensure that the air vents are always unobstructed and
clear. Clean them if necessary with a soft brush. Blocked
air vents may lead to overheating and damage the
product.
• Switch the machine o immediately if you are disturbed
while working by other people entering the working area.
Always let the machine come to complete stop before
putting it down.
• Do not overwork yourself. Take regular breaks to ensure
you can concentrate on the work and have full control
over the machine.
• Mow the lawn before working and fertilize afterwards.
• Make sure that the lawn is clear of stones, sticks, wire, or
other objects that could damage the machine or its motor.
• Select the suitable cutting depth for the actual grass
height.
• Do not work with this machine on a wet lawn because it
tends to stick to the underbody of the machine, preventing
the proper discharge of collected material, and it could
also cause you to slip and fall.
• Slowly push the machine forward. Move the machine at
appropriate speed. Do not move it too fast to prevent the
discharge from getting blocked and engine from useless
overloading.
Fig. 9
Switch box
Extension cord
Fig. 10
Switch lever
Safety lock button

12
• Work in slight overlapping rows. The most eective pattern
for scarifying/raking lawns is straight lines along one of the
sides. This will keep the rows even and ensures that all the
lawn is scaried/raked without missing any spots (Fig. 11).
• Circle around ower beds. When reaching a ower bed
in the middle of the lawn, make a row or two around the
circumference of the bed.
• Pay special attention when changing direction.
Scarifying
Consider the weather when scarifying. Scarify the lawn with an
increased depth setting during spring time between April and
May as the lawn is better able to recover during this season.
During a wet summer scarify again in late summer with a
decreased depth setting. Do not scarify during periods of hot
weather condition. During a dry rainless summer do not scarify
a second time in autumn.
Raking
In order for a healthy lawn to develop in the spring, it is
necessary for greater amounts of air to penetrate the area
around the roots of the grass. We recommend aerating the
lawn every 4 – 6 weeks depending on the state of your lawn.
Maintenance
mWARNING! Before carrying out any repairs or
servicing work, you must ensure that the machine has been
disconnected from the power supply. Repairs and maintenance
work other than described within this instruction manual may
be performed only by qualied specialist!
Service + Storage
To ensure long and reliable service, carry out the following
maintenance regularly. Servicing and cleaning work on the
machine and the removal of the guards may only be carried
out after the motor has been switched o and the plug
disconnected from the power supply.
• Keep all nuts, bolts and screws tight to be sure the
product is in a safe working condition.
• Allow the product to cool before storing in any enclosure.
• Check the thatch collection bag frequently for wear or
deterioration.
• Examine the product regularly and replace worn or
damaged parts for safety.
• Check that covers and guards are undamaged and
correctly tted. Carry out necessary maintenance or
repairs before using the machine.
• If the cutting device should happen to fail despite the
care taken in manufacturing and testing, repair should be
carried out by an authorized repair facility.
• Do not clean the machine while it is running.
• Ensure that all the fastening elements (screws, nuts, etc.)
are tight at all times so that you can safely work with the
machine.
• Check the machine frequently for signs of wear. Replace
worn or damaged parts.
• Store your machine in a dry place. To ensure a long
service life all screws and bolts should be cleaned and
then oiled.
• Clean the machine with a brush or cloth. Do not use any
solvents or water to remove dirt.
• The component that is subject to most wear is the cutting
device. You should therefore check the condition of the
cutting device and its mounting at regular intervals.
– If the cutting device is worn or blunt it must be replaced
immediately.
– If the machine starts to suer from excessive vibrations,
this means that the cutting device has not been
balanced correctly or has suered deformation due to
impacts. In this case it must be repaired or replaced.
Replacing/Changing Cutting Device
mWARNING! Always switch the machine o, disconnect
it from power supply and let it cool down before changing/
replacing the cutting device.
mWARNING! Cutting devices are very sharp and become
hot during use. Handle them carefully.
mWARNING! Wear safety gloves when handling cutting
devices in order to avoid injuries like burns and cuts.
mWARNING! Make sure all bolts are completely
tightened before operating the machine. Don't operate the
machine if any bolts are missing, loose, or damaged.
The product has two functions, scarifying or raking. The
scarifying cylinder is preassembled on the machine. The
dethatcher cylinder is included in the supply box. The cylinder
can be changed according to the application (Fig. 12).
Fig. 11

13
mWARNING! Before performing any maintenance, always
disconnect the power supply to the unit and wait until the tine
cylinder comes to a complete stop. Wear protective gloves
when handling the tines.
1. Remove the thatch collection bag.
2. Place the machine upside down on a at stable surface to
access the underbody.
3. Loosen the two locking bolts with the provided hex key
wrench, remove them together with the attached cutting
device (Fig. 13).
4. To remove the cutting device, rst lift the bearing seat and
then pull it out from the drive shaft.
5. Align and insert the respective cutting device: Slide the
hex nut into the socket of the drive shaft and x the
bearing seat to the support with the locking bolts (Fig. 14).
mWARNING! Make sure the cutting device (dethatcher
cylinder) is inserted properly. Make sure the semi-circle on the
bearing seat of the cylinder goes downward into the unit. If the
semi-circle is face up, it has been inserted incorrectly (Fig. 15).
NOTE: If you have any questions, please call the Snow Joe®
+ Sun Joe®customer service center at 1-866-766-9563
(1-866-SNOWJOE) for assistance.
After Use
1. Switch the machine o, disconnect it from the power
supply and let it cool down.
2. Check, clean and store the machine as described below.
Cleaning and Storage
1. Clean the exterior of the machine thoroughly using a soft
brush and cloth before storing. Do not use water, solvents,
or polishes.
2. Turn the scarier + dethatcher on its side to clean the
cylinder area.
Fig. 12
Scarifying
cylinder with
blades
Dethatcher
cylinder with
spring metal tines
Fig. 13
Locking bolt
Scarifying cylinder
Bearing seat
Fig. 14
Hex nut
Socket
Bearing seat
Fig. 15
Semi-circle

14
NOTE: Due to heavy use or when the grass is wet,
clippings tend to stick to and accumulate around the
cylinder, which will cause overheating. To prevent this,
clean the cylinder of all the grass clippings after every use.
3. Store the scarier + dethatcher in a dry place. Do not
place other objects on top of the scarier + dethatcher
during storage.
Thatch Collection Bag
1. Inspect the thatch collection bag before each use. Do not
use it if you nd any damage.
2. Clean the thatch collection bag after operation. Let the
thatch collection bag dry thoroughly before storing to
avoid mildew.
Transportation
1. Switch the product o and disconnect it from power
supply before transporting it anywhere.
2. Attach transportation guards, if applicable.
3. Adjust the cutting depth to the transportation stage (refer
to “CUTTING DEPTH ADJUSTMENT” on page 10).
4. Always transport the product by its handle.
5. Protect the product from any heavy impact or strong
vibrations which may occur during transportation in
vehicles.
6. Secure the product to prevent it from slipping or falling
over.
Service and Support
If your AJ798E-RM electric scarier + dethatcher requires
service or maintenance, please call 1-866-SNOWJOE
(1-866-766-9563) for assistance.
Model and Serial Numbers
When contacting the company, reordering parts or arranging
service from an authorized dealer, you will need to provide the
model and serial numbers, which can be found on the decal
located on the housing of the unit. Copy these numbers into
the space provided below.
Record the following numbers from the housing or handle of your
new product:
Model #:
Serial #:
A J 7 9 8 E - R M

15
Troubleshooting
mWARNING! Only perform the steps described within these instructions!
All further inspection, maintenance and repair work must be performed by an authorized service center or a similarly qualied
specialist if you cannot solve the problem yourself!
Suspected malfunctions, disturbances or damages are often due to causes that the user can x themselves. Follow the below
troubleshooting guidelines when checking the unit. In most cases, the problem can be resolved quickly and the dethatcher can
be restored to proper working order.
Motor does not start
Product does not reach
full power
Unsatisfying result
a) Not connected to power supply
b) Power cord or plug is defective
c) Other electrical defect to the product
d) Safety lock button not pressed
e) The machine is overheated.
a) Connect to power supply.
b) Contact an authorized service agent.
c) Contact an authorized service agent.
d) Press Safety lock button rst, then the
switch lever.
e) Clean the grass clippings around the
cylinder. Wait a while for the machine
to cool down, then restart again.
a) Extension cord not suitable for
operation with this product
b) Air vents are blocked
a) Use a proper extension cord
b) Clean the air vents
a) Cutting device worn
b) Scaried material exceeds capacity
c) Scarifying depth is incorrect
a) Replace the tine cylinder (see page 12)
b) Only scarify materials according to
capacity of the product
c) Adjust depth
Problem Possible Cause Solution

16
Optional Accessories
mWARNING! ALWAYS use only authorized Snow Joe® + Sun Joe® replacement parts and accessories. NEVER use
replacement parts or accessories that are not intended for use with this electric scarier + dethatcher. Contact Snow Joe® +
Sun Joe®if you are unsure whether it is safe to use a particular replacement part or accessory with your electric scarier +
dethatcher. The use of any other attachment or accessory can be dangerous and could cause injury or mechanical damage.
NOTE: Accessories are subject to change without any obligation on the part of Snow Joe® + Sun Joe®to provide notice of such
changes. Accessories can be ordered online at sunjoe.com or via phone by contacting the Snow Joe® + Sun Joe®customer
service center at 1-866-SNOWJOE (1-866-766-9563).
Replacement Dethatcher Tines AJ798E-DTNS
AJ798E-SCRF
ModelAccessories Item
1
2
Replacement Scarier Blade
Snow Joe® + Sun Joe®SJTW-A 14-gauge
50-foot extension cord with lighted end PJEXT50-B
3

17
NOTES

18
NOTES

19
SNOW JOE®+ SUN JOE®REFURBISHED GOODS WARRANTY
GENERAL CONDITIONS:
Snow Joe®+ Sun Joe®operating under Snow Joe®, LLC warrants
this refurbished product to the original purchaser for 90 days
against defects in material or workmanship when used for normal
residential purposes. If a replacement part or product is needed,
it will be sent free of charge to the original purchaser except as
noted below.
The duration of this warranty applies only if the product is put to
personal use around the household. It is the owner’s responsibility
to correctly perform all maintenance and minor adjustments
explained in the owner’s manual.
HOW TO OBTAIN YOUR REPLACEMENT PART OR PRODUCT:
To obtain a replacement part or product, please visit
snowjoe.com/help or email us at [email protected] for
instructions. Please be sure to register your unit beforehand
to speed up this process. Certain products may require a serial
number, typically found on the decal afxed to the housing
or guard of your product. All products require a valid proof
of purchase.
EXCLUSIONS:
• Wearing parts like belts, augers, chains and tines are
not covered under this warranty. Wearing parts can be
purchased at snowjoe.com or by calling 1-866-SNOWJOE
(1-866-766-9563).
• Batteries are covered in full for 90-days from the date of
purchase.
Snow Joe®+ Sun Joe®may from time to time change the design of
its products. Nothing contained in this warranty shall be construed
as obligating Snow Joe®+ Sun Joe®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 or misuse of
the Snow Joe®+ Sun 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 a replacement part or unit 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 give you specic legal rights in your state.
HOW TO REACH US:
We’re here to help Monday through Friday from 9AM to 7PM EST
and Saturday and Sunday 9AM to 4PM. You can reach us at
1-866-SNOWJOE (1 866-766-9563), online at snowjoe/com, via
email at [email protected] or tweet us @snowjoe.
EXPORTS:
Customers who have purchased Snow Joe®+ Sun Joe®
products exported from the United States and Canada should
contact their Snow Joe®+ Sun Joe® distributor (dealer) to obtain
information applicable to your country, province or state. If for
any reason, you are not satised with the distributor’s service,
or if you have difculty obtaining warranty information, contact
your Snow Joe®+ Sun Joe®seller. If in the event your efforts are
unsatisfactory, please reach out to us directly.

20
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