OPERATOR / PARTS MANUAL
12 Amp 20” Electric Snow Thrower
8122
2 12 Amp 20” Electric Snow Thrower Operator’s Manual
IMPORTANT MESSAGE
Thank you for purchasing this Mantis product. You have purchased a world class product, one of the best designed and built anywhere.
This machine comes with an Operator / Parts Manual. The useful life and good service you receive from this machine depends to a
large extent on how well you read and understand this manual. Treat your machine properly, lubricate and adjust it as instructed, and
it will give you many years of reliable service.
Your safe use of this Mantis product is one of our prime design objectives. Many safety features are built in, but we also rely on your
good sense and care to achieve accident-free operation. For best protection, study the manuals thoroughly. Learn the proper operation
of all controls. Observe all safety precautions. Follow all instructions and warnings completely. Do not remove or defeat any safety
features. Make sure those who operate this machine are as well informed and careful in its use as you are.
Mantis designs and builds its equipment to serve many years in a safe and productive manner. For longest life, use this machine only
as directed in the manuals, keep it in good repair and follow safety warnings and instructions. You’ll always be glad you did.
SAFETY RULES & WARNINGS ...................................................................................................................4-6
ASSEMBLY .................................................................................................................................................7-10
ELECTRICAL ................................................................................................................................................ 11
OPERATION .............................................................................................................................................12-13
MAINTENANCE ........................................................................................................................................14-15
STORAGE ......................................................................................................................................................16
PARTS SECTION ......................................................................................................................................17-18
TROUBLESHOOTING ...................................................................................................................................19
LIMITED WARRANTY .................................................................................................................................... 20
This Operator / Parts Manual is part of the machine. Suppliers of both new and
second-hand machines must make sure that this manual is provided with the
machine.
TABLE OF CONTENTS
WARNING
You will notice throughout this Owners Manual Safety Rules and Important Notes. Make sure you understand and obey these
warnings for your own protection.
I. SPECIAL SAFETY INFORMATION
An important part of the safety system incorporated in this snow thrower are the warning and information decals found on
various parts of the snow thrower. These decals must be replaced in time due to abrasion, etc. It is your responsibility to
replace these decals when they become hard to read.
IV. SAFETY RULES
This machine is NOT intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction
concerning use of the machine by a person responsible for
their safety.
Children should be supervised to ensure that they do not play
with the machine.
1. Read the operating and service instruction manual
carefully. Be thoroughly familiar with the controls and
the proper use of the equipment. Know to stop the unit
and disengage the controls quickly.
2. Never allow children to operate the equipment. Never
allow adults to operate the equipment without proper
instruction.
3. Keep the area of operation clear of all persons,
particularly small children, and pets.
4. Exercise caution to avoid slipping or falling, especially
during operation.
PREPARATION
1. Thoroughly inspect the area where the equipment is to
be used and remove all doormats, sleds, boards, wires,
and other foreign objects.
2. Do not operate the equipment without wearing
adequate winter garments. Wear footwear, which will
improve footing on slippery surfaces.
OPERATION
1. Do not put hands or feet near or under rotating parts.
Keep clear of the discharge opening at all times.
2. Exercise extreme caution when operating on or
crossing gravel drives, walks, or roads. Stay alert for
hidden hazards or trafc.
3. After striking a foreign object, stop the motor,
disconnect the power supply, thoroughly inspect the
snow thrower for any damage, and repair the damage
before restarting and operating the snow thrower.
4. If the unit should start to vibrate abnormally, stop
the motor, disconnect the power supply and check
immediately for the cause. Vibration is generally a
warning of trouble.
5. Stop the motor and disconnect the power supply,
before unclogging the collector/impeller housing
or discharge guide, and when making any repairs,
adjustments, or inspections.
6. When cleaning, repairing, or inspecting, make certain
the collector/impeller and all moving parts have
stopped.
7. Do not clear snow across the face of slopes. Exercise
extreme caution when changing direction on slopes.
Do not attempt to clear steep slopes.
Safety Rules & Warnings
Safety Rules & Warnings
to wear proper protection can result in serious
8. Never operate the snow thrower without proper guards,
plates or other safety protective devices in place.
9. Never operate the snow thrower near glass enclosures,
automobiles, window wells, etc. without proper
adjustment of the snow discharge angle. Keep children
and pets away.
10. Do not overload the machine capacity by attempting to
clear snow at too fast a rate.
11. Never direct discharge at bystanders or allow anyone
in front of the unit.
12. Disconnect the power supply when the snow thrower is
transported or not in use.
13. Use only attachments and accessories approved by
the manufacturer of the snow thrower.
14. Never operate the snow thrower without good visibility
or light. Always be sure of your footing, and keep a rm
hold on the handles. Walk; never run.
1. Check the unit at frequent intervals to be sure the
equipment is in safe working condition.
2. Always refer to owner’s guide instructions for important
details if the snow thrower is to be stored for an
extended period.
3. Maintain or replace safety and instructions labels, as
necessary.
4. Run the machine a few minutes after throwing snow to
prevent freeze-up of the collector/impeller.
5. General maintenance written instructions shall
be provided with the equipment for maintenance
operations recommended by the manufacturer to
maintain the equipment in safe operating condition.
SERVICE
Servicing requires extreme care and knowledge and should
be performed only by a qualied service technician. For
service please contact Mantis. A Mantis representative
can direct you to an AUTHORIZED SERVICE CENTER for
repair or provide the appropriate direction to best address
your servicing issue. When servicing, use only identical
replacement parts.
If the supply cord is damaged, it must replaced by the
manufacturer, its service agent or similarly qualied
persons in order to avoid a hazard.
WARNING
WARNING
WARNING
Precautions that involve
your safety.
Read Operator/
Parts Manual before
using snow shovel, or
performing any repair
or maintenance. Keep
owner’s manual in a
safe place.
Wear eye protection
when operating this
machine.
Pay attention that
bystanders are not
injured through foreign
objects thrown from
the snow shovel.
Keep hands away
from the collector/
impeller.
Keep all bystanders
(especially children and
pets) at least 100 ft.
away from the work area.
Do not operate on
inclines greater than
15°.
Danger - Keep
feet away from the
collector/impeller.
Keep hands and feet
away from rotating
parts.
Do not expose
to rain or use in
damp locations.
The power supply
must be disconnected
before carrying
out cleaning or
maintenance. Shut
off the motor before
unclogging the
discharge shute.
1. Upper handle
2. Middle handle
3. Lower handle
4. Wheel
5. Cover screws
6. Belt cover
This product requires assembly.
• Carefully remove the product and any accessories from
the box. Make sure that all items listed in the packing list
are included.
• Inspect the product carefully to make sure no breakage or
damage occurred during shipping.
• Do not discard the packing material until you have
carefully inspected and satisfactorily operated the product.
• If any parts are damaged or missing, please contact
Mantis for assistance.
• Snow thrower
• Discharge directional control
Assembly
Safety Rules & Warnings
completely.
serious personal injury.
2
1
8
9
10
11
12
WARNING WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
7. Scraper
8. Impeller
9. Discharge chute
10. Chute deector
11. Discharge directional control
12. Switch box
• Chute deector
• Owner's Manual
• Position the chute deector (1) over the discharge chute
(2), and align the mounting holes.
• Insert a rubber washer (5) between the chute deector (1)
and the discharge chute, maintaining the alignment of the
holes (3).
• Attach the chute deector to the discharge chute using a
carriage bolt (4), 2 washers (5), and a locknut (6).
• Insert a rubber washer (8) between the chute deector (1)
and the discharge chute, maintaining the alignment of the
holes (10).
• Remove any packing material that may have been
inserted between the upper and lower handles for
shipping purposes.
• Align the holes on the upper handle with the holes on the
middle handle. Insert the bolts, and use the wing nuts to
tighten them.
• Align the holes on the middle handle and the lower
handle. Insert the bolts, and tighten them using the wing
nuts provided.
• Attach the outlet end of an extension cord to the plug on
the rear of the snow thrower.
• Make a loop in the extension cord. From the right side,
pass the loop through the hole in the back of cord retainer
and place it around the hook.
Assembly
Assembly
8 12 Amp 20” Electric Snow Thrower Operator’s Manual
WARNING
Bolt
Bolt
1
2
8
9
10
11
• Attach the chute deector to the discharge chute using
2 carriage bolts (7), 4 washers (8), 4 external teeth
serrated lock washers (11) and 2 locknuts (9).
10 12 Amp 20” Electric Snow Thrower Operator’s Manual
Electrical
Assembly
This snow thrower is “DOUBLE INSULATED”
• Ground Fault Circuit Interrupter (GFCI) protection should
be provided on the circuit(s) or outlet(s) that will be used
for this snow thrower. For an extra measure of safety, use
a receptacle that has built-in GFCI protection.
• The nameplate on the snow thrower indicates the voltage
used. Do not connect the snow thrower to an AC circuit
that provides a different voltage from the voltage that is
indicated on the nameplate.
• Inspect the extension cord and the power cord on a
regular basis. Look for deterioration, cuts, or cracks in the
insulation. Inspect the connections for damage. Repair
or replace the extension cord or the power cord if any
damage is found.
• Verify that the rotor and all moving parts have come to
a complete stop, and disconnect the snow thrower from
the power supply in order to prevent accidental start-ups
before cleaning or performing any inspections or repairs.
• Do not abuse the extension cord. Do not carry the snow
thrower by the power cord or pull on the cord in order to
disconnect it from the receptacle.
• Keep the extension cord away from heat, oil, and sharp
edges in order to prevent damage.
• If the extension cord is damaged in any manner while it is
plugged in, disconnect it from the outlet immediately.
• Prevent any possible disconnection of the power cord
from the extension cord while the snow thrower is in use
by using the cord retainer and guide bar. Refer to the
section entitled Using the Cord Retainer.
• Avoid accidental start-ups. Do not carry the snow thrower
with a nger on the switch while it is plugged in. Verify
that the switch is in the "OFF" position before plugging in
the snow thrower.
• Unplug the snow thrower and allow it to cool down before
putting it into storage. Store the snow thrower indoors.
• Unplug the snow thrower when it is not in use and before
performing any maintenance or repairs.
(WHEN USING 120 V ONLY)
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not Recommended
WARNING
WARNING
WARNING
• Align the holes (1) on the directional chute arm (2) with
the holes on the lower directional chute arm (3). Insert the
hitch pin (4).
• Attach the directional chute arm (5) to the center handle (6)
using a washer (7) and a locknut (8).
1
2
8
• Rotate the lever release counterclockwise and hold to
allow access to the switch control lever.
• Pull the switch control lever toward the snow thrower
handle and let go of the lever release. Continue to hold
the switch control lever against the snow thrower handle
in order to keep it running.
• To stop the snow thrower, release the switch control lever.
Snow can be discharged to the left, straight ahead, or to the
right of the operator.
Follow these instructions in order to change the direction:
• Release the safety switch in order to stop the rotor.
• Turn the discharge directional control clockwise 360°. The
vanes will turn approximately 80° to the right.
• Turn the discharge directional control counter-clockwise
360°. The vanes will turn approximately 80° to the left.
Operation
Operation
12 12 Amp 20” Electric Snow Thrower Operator’s Manual
cause serious personal injury.
WARNING
WARNING
WARNING
CAUTION
WARNING
• Keep children and pets away from the operating area.
• Keep area cleared free of stones, toys, or other foreign
objects that the rotor blades can throw. Such items may
be covered by a snowfall and go unnoticed. If the snow
thrower strikes an obstruction or a foreign object during
operation, stop the snow thrower, unplug the extension
cord, remove the obstruction, and inspect the snow
thrower for damage.
• Rotate the chute crank clockwise in order to move the
discharge chute to the left, or rotate it counter-clockwise
in order to move the chute to the right.
• Do not force the chute deector too far forward so that a
gap appears between the discharge chute and the chute
deector.
• Do not overtighten the locknuts that hold the chute
deector in position to the point where it is necessary to
use excessive force in order to adjust the chute deector.
• Begin removing snow near the electrical outlet, and work
outward. Work back and forth, and not away from or
toward the outlet.
• When turning at the end of a swath, step over the cord,
and then turn the snow thrower.
• Overlap each swath, and discharge the snow in the
direction of the wind whenever possible.
• Shave down large banks of snow by placing the snow
thrower on the bank. Allow the weight of the snow thrower
to shave down the bank in a back-and-forth motion.
• Keep the extension cord clear of obstructions, sharp
objects, and all moving parts. Do not pull sharply on the
cord or abuse it in any manner. Inspect the extension
cord for damage that may result in an electric shock on a
regular basis. If the extension cord becomes damaged in
any way, replace it immediately.
• Some controls and moving parts may freeze in certain cold
and snowy weather conditions. If any of the controls become
hard to operate, stop the motor, disconnect the extension
cord, and inspect the snow thrower for frozen parts.
• Do not use excessive force when trying to operate frozen
controls. Free all of the controls and moving parts before
using the snow thrower.
• When operating the snow thrower, keep the wheels 1"
(2.5 cm) off the pavement by tipping the Snow Thrower
forward. This will help to prevent the snow from building
up on the wheels.
• After clearing the snow, allow the motor run for a few
minutes so that the ice doesn’t freeze any moving parts.
Then shut off the motor, wait for all moving parts to come
to a complete stop, and wipe the ice and snow off the
snow thrower. Rotate the chute crank several times in
order to remove the snow from the snow thrower.
• Lock the snow thrower when it is not in use. Disconnect
the extension cord.
Switch
Switch
The scraper is located at the bottom of the rotor housing.
• Remove the 5 screws that secure the scraper to the snow
thrower.
• Install the new scraper, and attach it securely using the 5
screws.
• Remove the 4 screws that secure the left side plate to the
frame of the snow thrower (Fig. 9). Remove the side plate.
• Pull the bearing away from the small pulley. Remove
the belt from the large pulley and the small pulley that is
located inside the housing (Fig. 9).
• Position the new belt over the small pulley (Fig. 10).
• Rotate the rotor with the left hand while positioning the
belt on the large pulley with the right hand (Fig. 10).
• Install the left side cover, and secure it using the 4 screws.
• Remove the 4 screws that secure the right side cover to
the frame of the Snow Thrower (Fig. 11).
• Remove the short shaft (Fig. 12).
• Push the sides of the housing out, as illustrated in Figure
13 and remove the rotor (Fig. 14).
• Install the new rotor, and reinstall the clip.
• Reinstall the right side cover, and secure it using the 4
screws.
Maintenance
Maintenance
Screw
Screw
Small
pulley
BeltScrew
Small
pulley
Belt
Parts section
Storage
• Run the snow thrower for a few minutes in order to melt
any snow that may be left on the snow thrower.
• Disconnect the extension cord from the snow thrower.
• Inspect the extension cord thoroughly for signs of wear or
damage. Replace it if it is worn or damaged.
• Inspect the snow thrower thoroughly for worn, loose, or
damaged parts.
• Store the extension cord with the snow thrower.
• Store the snow thrower in a clean, dry place. Cover it in
order to provide added protection.
Troubleshooting
Parts section
18 12 Amp 20” Electric Snow Thrower Operator’s Manual
PROBLEM POSSIBLE CAUSE SOLUTION
Then handle is not in The carriage bolts are not properly Adjust the height of the handle, and verify that the
position. seated. carriage bolts are properly seated.
Tighten the knobs.
The snow thrower does The power cord is disconnected from Reconnect the cord, and use the cord restraint to
not start. the switch. keep the cord close to the switch.
The switch is defective. Replace the switch.
The extension cord is not connected to Connect the plug on the snow thrower to the
the plug. extension cord.
The extension cord is not connected to Plug the extension cord into a live 120 V AC, 60 Hz
the power source. outlet.
The motor is on, but the The belt is damaged. Replace the belt (see the section entitled
rotor does not turn. Inspecting/Replacing the Drive Belt).
The Snow Thrower The scraper is worn. Replace the scraper (see the section
leaves a thin layer of entitled Replacing the Scraper).
snow behind.
1 33306100 Left side board
2 3290198 Belt
3 34901100 Synchronous belt
4 33212100 Tensioner x shaft
5 32104100 Tensioner bearing
6 33211100 Tensioner shaft
7 33903100 Tensioner spring
8 34165100 Motor vent cover
9 32201100 Locknut
10 33305100 Tensioner bracket
11 3290699 Washer
12 32203100 Cross screw
13 33301100-2 Motor support
14 31120100-1 Motor assembly
15 3220505 Screw
16 34120100-1 Waterproof bracket
17 33378100 Motor clamp
18 32208100 Cross screw
19 32210100 Washer
20 322011213 Nylock nut M3.5
21 3410835-59 Knob
22 32215100 Washer
23 34111100-1 Chute deector
24 32216100 Hex screw
25 34110100-2 Discharge chute
26 32207100 Cross screw
27 34104100-2 Out chute cover
28 34121100A Waterproof support
29 34106100-1 Inlet chute cover
30 33307100 Right side board
31 34102100-9 Rear cover
32 34160100 Pinion bracket
33 34161100 Plate
34 34162100 Square bushing
35 33260100 Pin
36 32288100 Screw
37 32901261 Locknut
38 31107100-1 Pigtail cable
39 311021212 Switch assembly
40 33207100-13 Middle handle
41 3290299 Washer
42 3330499 Screw
QTY
1
1
1
1
1
1
1
2
7
1
7
4
1
1
9
1
1
1
2
1
2
4
1
2
1
20
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
QTY
1
1
1
1
1
1
1
1
1
1
4
4
2
2
2
1
1
2
1
2
1
12
2
1
4
1
1
1
1
2
3
1
1
1
1
1
43 3420199 Rubber
44 3410499A-9 Handle
45 33306699 Washer
46 32901251 Retaining ring
47 33208628-9 Upper handle
48 3490137-1 Soft grip sponge
49 3290599 Nut
50 33214100-3 Rear rocker
51 3320643 Hitch pin
52 33214100-2 Upper rocker
53 3220436 Bolt
54 3410835-4 Knob
55 3290135 Split pin
56 3411799C-12 Wheel cover
57 3220898 Washer
58 3411799-22 6” Wheel (right)
59 33206100-13 Lower handle
60 34250100 Rubber sleeve
61 3411799-12 6” Wheel (left)
62 33304100 Front support
63 33201100A Short shaft
64 32206100 Cross screw
65 32102100 Waterproof bearing
66 33309100 Right support
67 34158100 Inner cord clamp
68 34105100-1 Vane
69 31118100 Impellor assembly
70 34101100-9 Front cover
71 33308100 Left support
72 3220651 Nut
73 32217100 Washer
74 33203100A Pulley wheel support shaft
75 31110100A Pulley wheel assembly
76 34109100-1 Driver wheel
77 33273100 Left barrier chip
78 33274100 Right barrier chip
LIMITED WARRANTY
MANTIS extends this limited warranty against defects in material and workmanship for a period
of two (2) years under normal usage for residential purposes from the date of purchase by the
original purchaser.
MANTIS will repair or replace, at its discretion, any part or parts of the product found to
be defective in material or workmanship during the warranty period. Warranty repairs and
replacements will be made without charge for parts or labor. All parts replaced under warranty
will be considered as part of the original product, and any warranty on the replaced parts will
expire coincident with the original product warranty. If you think your MANTIS ELECTRIC SNOW
THROWER is defective in material or workmanship contact Mantis and you will be instructed to
send it, along with your proof of purchase (sales receipt) to:
Mantis
1028 Street Road
Southampton, PA 18966
You are responsible for pickup and delivery charges; the product must be returned to us postage
paid.
MANTIS assumes no responsibility in the event that the product was not assembled or used in
compliance with any assembly, care, safety, or operating instructions contained in the Owner’s
Manual or accompanying the product. This limited warranty does not cover damages or defects
due to normal wear and tear, lack of reasonable and proper maintenance, failure to follow
operating instructions or owner’s manual, misuse, lack of proper storage or accidents [or routine
maintenance parts and service]. This limited warranty shall not be effective if your Mantis electric
snow thrower has been subjected to negligence or has been repaired or altered by anyone other
than Mantis or Mantis authorized dealer or authorized service center.
You must maintain your MANTIS ELECTRIC SNOW THROWER by following the maintenance
proce-dures described in the owner’s manual. Such routine maintenance, whether performed by
you or a dealer, is at your expense.
MANTIS MAKES NO EXPRESS OR IMPLIED WARRANTIES, REPRESENTATIONS OR
PROMISES EXCEPT THOSE CONTAINED HEREIN. THERE ARE NO OTHER WARRANTIES,
INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. ALL WARRANTIES OTHER THAN THE EXPRESS WARRANTY SET FORTH
ABOVE ARE SPECIFICALLY DISCLAIMED. THE DURATION OF ANY IMPLIED WARRANTY,
INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS
LIMITED TO THE DURATION OF THIS WRITTEN LIMITED WARRANTY. MANTIS DISCLAIMS
ALL LIABILITY FOR INDIRECT, INCIDENTAL AND/OR CONSEQUENTIAL DAMAGES
IN CONNECTION WITH THE USE OF THE MANTIS PRODUCTS COVERED BY THIS
WARRANTY. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS AND/OR DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THAT ABOVE LIMITATIONS AND
EXCLUSIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATES TO
STATE.
MANTIS
1028 Street Road
Southampton, PA 18966
800-366-6268
© 2014 Schiller Grounds Care, Inc. All Rights Reserved, P/N 430102
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