MTD Series 790 User manual
18(4VSHYGXW%OXMIRKIWIPPWGLEJXw7EEVFV²GOIRw+IVQER]
L 09
FORM NO. 769-02686A
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English Operating instruction
4
Contents
Safe operating practices . . . . . . . 4
Getting to know your appliance . . 6
Assembly instructions . . . . . . . . . 7
Oil and fuel recommendations . . . 8
Operating manual . . . . . . . . . . . . 8
Maintenance and repair . . . . . . . . 9
Warranty . . . . . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . 11
Technical specifications . . . . . . 12
Details on the ratings plate
Enter all information on the rating
plate of your unit in the following
field.
You can find the rating plate near
the engine.
These specifications are very
important for subsequent identifi-
cation when ordering spare parts
and for customer service.
These and other details for your
appliance can be found on the
separate CE declaration of con-
formity that forms an integral part
of these operating instructions.
Safe operating practices
Using the unit correctly
This unit is designed
– to be used in accordance with
the descriptions and safety
instructions indicated in this
operating manual
– for private use
– for trimming lawn edges and small
inaccessible areas of grass
(e.g. under bushes),
– and as a leaf blower for smaller
surfaces (e.g. along fences, walls,
and flowerbeds or around trees).
It is not permitted to use this unit
for any other purposes. The user is
liable for all injuries to third parties
and damage to their property.
Operate the unit only in the technical
condition as stipulated and delivered
by the manufacturer.
Arbitrary changes to the unit will
exclude the manufacturer from
any liability for resulting injury and/or
damage.
Read all instructions before
operating
nPlease read these instructions
carefully. Familiarize yourself with
the operation and handling of the
unit.
nDo not use this unit if you are tired
or ill or under the influence of
alcohol, drugs or medication.
nChildren and young people under
16 years of age must not operate
the unit.
nCheck the unit before using it.
Replace damaged parts. Check
whether fuel is leaking out. Ensure
that all connections are attached
and tight. Replace cutting
attachment parts which are
cracked, flawed or damaged in
any other way. Ensure that the
cutting attachment has been
installed correctly and attached
securely. Ensure that the guard for
the cutting attachment has been
attached correctly and is in the
recommended position. If these
instructions are not followed,
the user and bystanders may
be injured or the unit damaged.
nUse only original replacement
lines which have a diameter
of 2.67 mm. Never use a metal-
reinforced string, wire, chain,
rope, etc. These may break off
and become dangerous
projectiles.
nAlways be aware of the risk of
injury to head, hands and feet.
nDepress the throttle. It must
automatically return to the home
position. Perform all settings and/
or repairs before operating the
unit.
nBefore using the unit, always clear
the area which you want to trim.
Remove all objects such as
stones, broken glass, nails, wire
or string which could be ejected
or become entangled in the
cutting attachment. Remove
children, bystanders and animals
from the area. Keep children,
bystanders and animals at a
minimum distance of 15 m; there
is always a risk of bystanders
being hit by ejected objects.
Bystanders should wear eye
protection. If somebody
approaches, immediately switch
off the engine and cutting
attachment.
Safety instructions for petrol-
driven lawn trimmers
Petrol is highly flammable and
the vapours may explode if ignited.
Take the following precautions:
nStore petrol in designated and
permitted containers only.
nKeep ignition sources away
from spilled petrol. Do not start
the engine until the petrol vapours
have evaporated.
nBefore filling the tank, always
switch off the engine and leave
it to cool down. Never remove
the tank cap and never fill the tank
while the engine is hot. Before
using the unit, ensure that the tank
cap is screwed on tightly. Slowly
unscrew the tank cap to reduce
the pressure in the tank gradually.
nMix petrol and fill the tank in a
clean, well ventilated outdoor area
only where there are no sparks
or flames. After switching off the
engine, slowly unscrew the tank
cap. Do not smoke while mixing
petrol or filling the tank.
Immediately wipe any spilled
petrol off the unit.
nBefore switching on the engine,
carry the unit at least 10 m away
from the filling station. While filling
the tank or using the unit, do not
smoke and keep sparks and
naked flames out of the area.
Operating instruction English
5
Operating the unit
nNever start the unit and never
leave it running in a closed room
or building. The inhalation
of exhaust gases may be fatal.
Use the unit outdoors only.
nWear eye and ear protection when
using the unit. If working in a dusty
environment, wear a face or dust
mask. A long-sleeved shirt is
recommended.
nWear thick, long trousers , boots
and gloves. Do not wear loose
clothing, jewellery, short trousers,
sandals and do not walk barefoot.
Pin your hair above your
shoulders.
nThe cutting attachment guard
must always be attached when
the unit is being used as a lawn
trimmer. Both trim lines must
be pulled out and the correct line
must be installed. The trim line
must not be pulled out over
the end of the guard.
nThe unit has a clutch. The cutting
attachment stops when the unit
is running at no load. If it does
not stop, have the unit adjusted
by a mechanic at your authorised
dealer.
nBefore switching on the unit,
ensure that the line spool/cutting
blade cannot strike an object.
nKeep these instructions in a safe
place!
nDo not touch the cutting
attachment on the unit.
nOperate the unit in daylight
or adequate artificial lighting only.
nAvoid starting the unit
unintentionally. Be ready to
operate the unit when you pull the
starter rope. User and unit must
be in a stable position when the
unit is started. Follow the Start/
Stop instructions.
nUse this unit for its designated
purpose only.
nDo not stretch too far over the
unit. Always have a secure footing
and keep your balance.
nWhen operating the unit, always
hold the unit firmly with both
hands.
nKeep your hands, face and feet
away from all moving parts.
Do not touch the cutting
attachment while it is rotating and
do not attempt to stop it.
nIf extremely violent vibrations
occur, switch off the engine
IMMEDIATELY. Vibrations are
a sign of problems. Check
thoroughly for loose bolts, nuts
or other damage before you
continue cutting. If required, repair
or replace the affected parts.
nDo not touch the engine or
muffler. These parts become very
hot while the unit is being used.
They remain hot for a short time
even when the unit is switched off.
nDo not let the engine run quicker
than required for cutting or
trimming of lawn edges. Do not
run the engine at high speed when
it is not cutting.
nAlways switch off the engine
if you cannot start cutting
immediately or if you are moving
from one place to another.
nIf you strike or ensnare a foreign
object, immediately switch off the
engine and check whether the unit
has been damaged. Never use
the unit with loose or damaged
parts.
nStop and switch off the engine
for maintenance, repairs or when
changing the cutting attachment
or other attachments. Also pull out
the spark-plug terminal.
nUse only original spare parts
for repairs. These parts can be
purchased from your authorised
dealer.
nNever use parts, accessories
or attachments which are not
authorised for this unit. Otherwise,
the user may be seriously injured
and the unit damaged. In addition,
your warranty may be deemed
null and void.
nKeep the unit clean and ensure
that there are no plants or other
objects caught between the
cutting attachment and guard.
nTo reduce the risk of fire, please
replace damaged mufflers and
spark extinguishers and remove
grass, leaves, excess lubricants
and layers of soot from the engine
and muffler.
nHave all repairs carried out
by a repair shop only.
Operating times
Observe the national/municipal
regulations concerning times
of use (if required, ask your local
authority).
Other safety instructions
nAs long as the tank still has petrol
in it, never store the unit in a
building where vapours could
come into contact with sparks or
naked flames.
nLeave the engine to cool down
before transporting or conveying
the unit. Attach the unit securely
for transportation.
nStore the unit in a dry condition,
locked away or high up to prevent
unauthorised use and damage.
Keep the unit away from children.
nNever douse or splash the unit
with water or other liquids. Keep
the handle bar dry, clean and
dust-free. Clean the unit after
each use and follow the
instructions for cleaning and
storage.
nDispose of waste petrol/oil or any
packaging remnants in
accordance with local regulations.
nKeep this manual. Read
it frequently and use it to instruct
other users. If you lend this unit
to somebody else, also include
this manual.
Keep this manual in a safe place
English Operating instruction
6
Symbols on the appliance
This operating manual describes
safety and international symbols
and pictograms which may be dis-
played on this unit. Read this user
handbook in order to familiarise
yourself with all safety, installation,
operating and repair instructions.
7EJIX]ERH
[EVRMRKW]QFSP
Indicates danger, warning
or a reason to be cautious.
Can be used together with other
symbols or pictograms.
6IEHSTIVEXMRK
QERYEP
Failing to follow these rules and
precautionary measures may cause
grievous injury. Read the operating
manual before starting or operating
the unit.
;IEVI]IERH
IEV TVSXIGXMSR
Ejected objects may cause serious
eye injuries and excess noise may
cause loss of hearing.
When operating the unit, wear eye
and ear protection.
;IEVLIEH
TVSXIGXMSR
Falling objects may cause serious
head injuries. Wear head protection
when operating the appliance.
/IITF]WXERHIVW
E[E]
All bystanders, especially children
and pets, must be kept at least 15 m
from the working area.
4IXVSP
Always use clean and fresh lead-free
petrol for mixing petrol.
3MP
Use only authorised oil according
to the operating manual for mixing
petrol.
)NIGXIHSFNIGXW
ERHVSXEXMRKTEVXW
QE]GEYWI
WIVMSYWMRNYVMIW
Do not use the unit if the protective
housing has not been correctly posi-
tioned for cutting. Keep away from
the rotating line coil and cutting
blade.
7LEVTFPEHI
Sharp blade on the guard as well
as sharp cutting blade. To prevent
grievous injury do not touch the
blade.
&PS[MRKXYVFMRI
GERGEYWI
KVMIZSYWMRNYVMIW
Before any cleaning, adjusting, and
maintenance work always stop the
engine and wait until all moving parts
have come to a stop.
&I[EVISJLSX
WYVJEGIW
Do not touch hot muffler cover,
gearbox or cylinder. You could burn
yourself. These parts become
extremely hot while the unit is being
used. They remain hot for a short
time even when the unit is switched
off.
;IEVJSSXERH
LERHTVSXIGXMSR
While operating this unit, wear heavy
duty boots and protective gloves.
-KRMXMSRW[MXGL
ON / START / RUN
-KRMXMSRW[MXGL
OFF or STOP
'LSOI
WIXXMRKW
1 Full choke start position
2 Half choke intermediate position
3 Operating position
1E\MQYQVTQ
Do not let the unit run more quickly
than the maximum rpm.
Getting to know your
appliance
'EYXMSR(EQEKIXSXLI
ETTPMERGI
8LMWJMVWXHIWGVMFIWXLIGSRXVSPERH
HMWTPE]JYRGXMSRW(SRSXI\IGYXI
ER]SJXLIWIJYRGXMSRW]IX
Fig. 1
1. Engine
2. Tank cap
3. Starter handle
4. Spark plug
5. Choke lever
( Depending on model)
6. Intake pump/primer
7. Air filter/muffler cover
Operating instruction English
7
8. Shoulder belt holder
9. ON/OFF switch / ignition switch
10. Throttle
11. D-shaped handle
12. EZ-Link™
13. Shaft
14. Cutting attachment cover
15. Toggle
16. Toggle lock
17. Blower
18. Cutting attachment
19. Line cutting blade
20. Spacing collar
Fig. 2–3
1. D-shaped handle
2. Shaft
3. Shaft handle
4. Screw
5. Washer
6. Wingnut
7. Min distance 15.2 cm
8. Shoulder belt holder
9. Spacing collar
Fig. 4–6
(Depending on model)
1. EZ-Link™
2. Release button
3. Button
4. Guide groove
5. Main hole
6. Upper shaft tube
7. Lower shaft tube
Fig.7–8
1. Lock pin
2. Mount
3. Nut
4. Screw
Fig. 9–11
1. Throttle
2. ON/OFF switch / ignition switch
3. Full choke position (1) *
4. Half choke intermediate
position (2) *
5. Operating position (3) *
6. Choke lever *
7. Intake pump/primer
8. Starter rope
* Depending on model
Fig. 13–14
1. Toggle
2. Toggle lock
Fig. 19–20
1. Choke lever
( Depending on model)
2. Screw
3. Air filter
Fig. 24–25
1. Idle speed controller
2. Spark plug
Installation manual
Installing the D-shaped handle
nFor your safety the D-shaped
handle must be installed before
the distance collar. Push down
the handle bar over the shaft
so that the handle is at angle
to the engine (Fig. 2).
'EYXMSR
(SRSXTYWLXLI(WLETIHLERHPI
FEVSZIVXLIHMWXERGIGSPPEV
3XLIV[MWIXLILERHPIFEVSVYRMX
QE]FIHEQEKIH
nAttach and tighten bolt, washer
and wing nut.
Adjusting the D-shaped
handle
nLoosen the wing screw. It is not
required to remove the screws
and the washer.
nRotate the D-shaped handle
until the handle is positioned over
the shaft. Minimum distance
15.2 cm (Fig. 2).
nWhile holding the unit in the
operating position (Fig. 12), move
the D-shaped handle into the
position which ensures the best
possible handling of the unit and
tighten the wing screw (Fig. 2).
Attaching and adjusting
the shoulder belt (Depending
on model)
nPull the belt through the buckle.
nPull the shoulder belt over your
head and place the pad on your
shoulder.
nLatch the hook of the shoulder
belt into the metal holder (Fig. 3).
Adjust the belt to a comfortable
length.
Using the EZ-LINKTM system
Note
To facilitate installation and removal
of attachments, place the unit on the
ground or a workbench.
Removing cutter/blower
and other attachments
nTo loosen the attachment, rotate
the screw handle (3) to the left
(Fig. 6).
nPress and hold down the release
button (2) (Fig. 4).
nHold the upper shaft housing (7)
securely and pull the attachment
directly out of the EZ-LinkTM
coupling (Fig. 5).
Installing the cutter/blower
and other attachments
nTo loosen the attachment, rotate
the screw handle to the left
(Fig. 6).
nHold the attachment securely and
push directly into the EZ-LinkTM
coupling (Fig. 5).
Note
Alignment of the release button (2)
with the guide groove (4) facilitates
installation (Fig. 4).
nSecure the attachment by rotating
the button (3) to the right (Fig. 6).
Before operating the unit, ensure
that the rotary handle is secure.
Installing the cutter
attachment cover
nAttach the cover with the guide
hole over the lock pin (1; Fig 7).
nAlign the cover so that its holes
agree with those in the locking
sleeve.
nAttach the cover to the mount with
the screw (4) on the right and the
nut (3) on the left (Fig 8).
nCheck that the connections
sit tightly and correctly.
Other manuals for Series 790
4
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