McCulloch Trimmer MB 305 CBS User Manual

WWW.McCULLOCH.COM  
Original instructions  
GB Operator’s manual  
Husqvarna AB  
SE-561 82 Huskvarna  
Sweden  
MT 305 CPS  
MB 305 CBS  
WARNING: For your own safety please read  
this manual before attempting to operate your new  
unit.Failure to follow instructions can result in  
serious personal injury.Spend a few moments to  
familiarize yourself with your trimmer before each  
use.  
Rev. 1 2012-12-07  
576191713  
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SPECIFICATIONS  
GENERAL IDENTIFICATION  
Model No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MT 305 CPS . . . . . . . . . . . . . . . . . . . . . . .MB 305 CBS  
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air-cooled, 2-Cycle, . . . . . . . . . . . . . . . . . . . . . Air-cooled, 2-Cycle,  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Chrome Cylinder . . . . . . . . . . . . . . . . . . . . . . . Chrome Cylinder  
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 cm3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30cm3  
Dry Weight (without fuel, cutting attachment and guard) . . . . . . . . . .5.7 Kg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.35Kg  
MT 305 CPS  
8
MB 305 CBS  
10  
3
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .550cm3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .550cm  
9
9
Bump Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Twin Line Bump Feed . . . . . . . . . . . . . . . . . . .Twin Line Bump Feed  
Blade4 Teeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Teeth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Teeth  
Drive Shaft Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66cm + 66cm . . . . . . . . . . . . . . . . . . . . . . . . . 66cm + 66cm  
Cutting Width (Twin Line Head) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43cm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43cm  
(Blade) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23cm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23cm  
Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .“P” Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bike Handle  
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic  
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Centrifugal Clutch . . . . . . . . . . . . . . . . . . . . . . Centrifugal Clutch  
Sound pressure level (EN ISO 11806)(K=2.5). . . . . . . . . . . . . . . . . . . . 96.59 dB(A) . . . . . . . . . . . . . . . . . . . . . . . . . . .96.59 dB(A)  
Sound power level (EN ISO 11806)(K=2.5) . . . . . . . . . . . . . . . . . . . . . 109.43 dB(A). . . . . . . . . . . . . . . . . . . . . . . . . . .109.43 dB(A)  
Guarantee sound power level (2000/14/EC+2005/88/EC) . . . . . . . . . . . . . . .112 dB(A) . . . . . . . . . . . . . . . . . . . . . . . . . . . .112 dB(A)  
Vibration (K=1.5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.463 m/s2. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.987 m/s2  
Maximum Engine Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.89 kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.89 kW  
Engine Speed (rotational frequency) at recommended  
11  
20  
7
7
8
6B  
6A  
5
max. spindle rotational frequency  
(Bump Feed Head) . . . . . . . . . . . . . . . . . . . . . . . . . . . .9000 min-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .9000 min-1  
(Blade) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11000 min-1 . . . . . . . . . . . . . . . . . . . . . . . . . . .11000 min-1  
Maximum rotational frequency of the spindle  
19  
15  
(Bump Feed Head) . . . . . . . . . . . . . . . . . . . . . . . . . . . .6700 min-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6700 min-1  
(Blade) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8200 min-1 . . . . . . . . . . . . . . . . . . . . . . . . . . .8200 min-1  
Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3000±300 min-1. . . . . . . . . . . . . . . . . . . . . . . . .3000±300 min-1  
Specific fuel consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .415.3 g/kWh . . . . . . . . . . . . . . . . . . . . . . . . . . .415.3g/kWh  
16  
14  
18  
3
4
17  
2
12  
1
13  
6B. “BIKE” HANDLE (MB 305 CBS)  
7. THROTTLE TRIGGER  
8. ON/OFF SWITCH  
1. TRIMMER HEAD  
2. TRIMMER LINE  
3. SHIELD  
13. FUEL TANK  
14. AIR FILTER COVER  
15. STARTER HANDLE  
16. MUFFLER SHIELD  
17. PRIMER BULB  
9. THROTTLE TRIGGER LOCK  
OUT  
4. BLADE  
5. DRIVE SHAFT  
10. THROTTLE LOCK  
18. SHOULDER STRAP (MT 305 CPS)  
6A. “P” HANDLE  
(MT 305 CPS)  
11. CHOKE LEVER  
19. COUPLER  
12. STARTER ROPE HOUSING  
20. HARNESS (MB 305 CBS)  
SAFETY FEATURES  
CUTTING ATTACHMENT SHIELD must be installed to prevent debris from being thrown at the operator and prevent  
the string from extending longer than necessary.  
3
16 MUFFLER SHIELD helps prevent hands, body and/or combustible materials from making contact with a hot muffler.  
3
4
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Remove blade nut by turning clockwise. Remove the  
ATTACHING THE SHIELD  
ASSEMBLY INSTRUCTIONS  
screwdriver. Remove both washers and blade.  
See INSTALLATION OF THE METAL BLADE for  
illustrations. Be sure to store all parts and instructions  
for future use. Never use the trimmer head with the  
metal blade installed.  
D
WARNING: The shield must be properly installed. The  
shield provides partial protection to the operator and others  
from the risk of thrown objects, and is equipped with a line  
limiter blade which cuts excess line to the proper length.  
The line limiter blade (on underside of shield) is sharp and  
can cut you.  
C
WARNING: Please assemble the unit according  
to the assembly instructions. Failure to do  
so may cause injury to the operator.  
B
A
INSTALLATION OF THE TRIMMER HEAD  
“P” ATTACHING THE HANDLE  
(MT 305 CPS)  
E
NOTE: If your unit has a plastic cover over the threads on  
the threaded shaft, remove the covering to expose the  
threads. Before installing the trimmer head, make sure the  
dust cup and retaining washer are positioned on the  
gearbox.  
1. Insert bracket into slot on shield.  
2. Pivot shield to align holes in shield and bracket.  
C
D
DANGER: To avoid serious injury, the barrier portion of  
the handle must be installed as shown to provide a barrier  
between operator and the spinning blade.  
1. Position the loop handle on the shaft. Note that the  
handle must be mounted in front of direction arrow  
on the shaft. (The distance between both handles  
shall be at least 250mm.)  
Fig. 1C  
Bracket  
F
Shield  
ot  
Shield  
90ß  
Bolt  
Handle  
200mm  
(minimum)  
Fig. 1D  
Fig. 1E  
Dust cup  
s  
INSTALLING THE ATTACHMENT  
2. Secure shield to bracket with bolt.  
WARNING: To avoid serious personal injury,  
shut unit off before removing or installing  
attachment.  
Retaining washer  
Nut  
Securing  
plate  
NOTE: To make installing or removing the attachment  
easier, place the unit on the ground or on a work bench.  
NOTE: Make sure all parts are properly installed as  
shown in the illustration before installing the trimmer head.  
Wrench  
1. Turn the knob (A) counterclockwise to loosen (Fig.  
2A).  
2. Install the bolt, securing plate and nut as shown  
in the illustration.  
1. Align hole in the dust cup with the hole in the side of  
the gearbox by rotating the dust cup.  
2. Insert a small screwdriver into aligned holes. This will  
keep the shaft from turning while tightening trimmer  
head.  
3. While holding the screwdriver in position, thread  
trimmer head onto the shaft in the direction shown on  
the decal (counterclockwise). Tighten until secure.  
NOTE: The retaining washer must be positioned with the  
raised section facing toward the gearbox.  
2. While firmly holding the attachment (B), push it  
straight into the Quick-Change coupler (C) until the  
release button (D) appears in the primary hole (E) of  
the Quick-Change coupler. (Fig. 2B)  
Bolt  
3. Turn the knob (A) clockwise to tighten. (Fig. 2C)  
CAUTION: The release button must be in the  
primary hole and the knob securely tightened  
before operating this unit.  
CONFIGURING YOUR UNIT  
You can configure your unit using a cutting head for grass  
and light weeds, or a weed blade for cutting grass, weeds,  
and brush up to 1 cm in diameter. To assemble your unit,  
go to the section for the desired configuration and follow  
the instructions.  
ASSEMBLY INFORMATION - METAL BLADE  
3. Make a fnal adjusment of the hande to a comor-  
table working position. Tighten the nut firmly with  
wrench (provided).  
All attachments are designed to be used in the primary  
hole unless otherwise indicated in the specific attach-  
ments operators manual. If the incorrect hole is used, it  
could result in injury, or damage to the unit.  
METAL  
BLADE  
ASSEMBLY INFORMATION - TRIMMER  
HEAD  
“BIKE¨ HANDLE INSTALLATION  
(MB 305 CBS)  
A
C
C
B
B
1. To install handle onto unit, you will need the following  
components from your user kit: “Bike” handle (A), fix-  
ing holder (B), clamp (C) and screws (D). (Fig. 1C)  
TRIMMER  
HEAD  
Install the fixing holder (B) before the sponge sleeve  
(E), and adjust it to a proper position.  
2.  
E
E
D
D
3. Install the Bike handle (A) on the fixing holder (B), put  
the other clamp (C) over bike-handle, adjut handle to  
appropriate position and tighten the other 2 screws  
(D). The left handle shall be at least 200mm  
horizontally perpendicularly from the shaft tube. The  
handle shaft must be mounted on the right side of  
direction of arrow head on the handle shaft. (Fig.1D)  
4. Install wire tie (F) included in the user kit as shown  
(Fig. 1E).  
NOTE: Remove the trimmer head before installing  
the weed blade. To remove the trimmer head, align hole  
in the dust cup with the hole in the side of the gearbox by  
rotating the dust cup. Insert a small screwdriver into  
aligned holes. This will keep the shaft from turning while  
loosening the trimmer head. Remove the trimmer head by  
turning clockwise. Remove the screwdriver.  
See INSTALLATION OF THE CUTTING HEAD for  
illustrations. Be sure to store all parts and instructions for  
future use.  
Fig. 2A  
Fig. 2B  
NOTE: Remove the blade before attaching the trimmer  
head. To remove blade, align hole in the dust cup with  
the hole in the side of the gearbox by rotating the blade.  
Insert a small screwdriver into aligned holes. This will  
keep the shaft from turning while loosening the blade nut.  
Fig. 2C  
6
5
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INSTALLATION OF THE METAL BLADE  
REMOVE AND INSTALLATION THE BLADE  
COVER  
OPERATING INSTRUCTIONS  
WARNING: Remove fuel cap slowly when  
refueling.  
WARNING: Wear protective gloves when handling or  
performing maintenance on the blade to avoid injury. The  
blade is sharp and can cut you even when it is not  
moving.  
WARNING: Do not use any blades, or fastening  
hardware other than the washers and nuts shown in the  
following illustrations. These parts must be provided by  
McCulloch and installed as shown below. Failure to use  
proper parts can cause the blade to fly off and seriously  
hurt you or others.  
NOTE: The dust cup is located on the gearbox shaft and  
not in the parts bag. All other fasteners mentioned in the  
following assembly steps are in the parts bag.  
1. Install the blade and the retaining washer over the  
threaded shaft.  
2. Make sure the raised part of the retaining washer is  
facing the gearbox and the raised area fits into the  
hole in the center of the blade.  
SHOULDER HARNESS  
CAUTION: Before you take apart the blades,  
wear gloves to prevent any danger.  
WARNING: ALWAYS WEAR SHOULDER  
HARNESS when operating unit with a blade.  
Attach harness to trimmer after starting unit  
and engine is running at IDLE. Turn ENGINE  
OFF before disconnecting shoulder harness.  
This engine is certified to operate on unleaded petrol. Before  
operation, petrol must be mixed with a good quality 2-cycle air-cooled  
engine oil designed to be mixed at a ratio of 40:1. A 40:1 ratio is  
obtained by mixing 5 litres of unleaded petrol with 125ml of oil. DO  
NOT USE automotive oil or marine oil. These oils will cause engine  
damage. When mixing fuel, follow instructions printed on oil  
container. Once oil is added to petrol, shake container momentarily  
to assure that the fuel is thoroughly mixed. Always read and follow  
the safety rules relating to fuel before fueling your unit.  
CAUTION:When the machine is not in use or  
in transportation, make sure blades have  
been covered.  
NOTE: When you install the cutting attachment, please  
follow the below requirements.  
1a. Put the harness on so the shoulder strap is over your  
LEFT shoulder.  
1b. For Model MB 305 CBS , the shoulder straps are on  
your both shoulders. NOTE: Pull the black strip(E) in  
order to quickly release the harness from the  
operator in the event of emergency. (Fig 8C)  
2. Attach the harness clip (C) to the ring (D) mounted on  
the shaft (Fig. 8A and 8B and 8D).  
3. Adjust length of shoulder strap so trimmer head is  
parallel to the ground as it hangs from the strap. A  
few practice swings without starting engine should be  
made to determine correct balance.  
1. Before assembling blades, please remove the blades  
cover first.  
2. Refer figure 6A and Figure 6B, hold the blades cover,  
and pull sligtly the cover outward the cover can be  
taken apart.  
FUEL REQUIREMENTS  
Use good quality unleaded petrol. The lowest recommended octane  
grade is 90 (RON).  
3. Refer to figure 6C and 6D, and assemble in the oppo-  
site way to cover the blades.  
IMPORTANT  
Use of alcohol blended fuels (called gasohol or using ethanol or  
methanol) can cause major enging performance and durability  
problems.  
3. Slide the blade and retaining washer onto the shaft of  
the gearbox.  
4. Place the cupped washer onto the shaft. Make sure  
the cupped side of the washer is toward the blade.  
5. Install the blade nut by threading onto the shaft  
counterclockwise.  
WARNING: Alternative fuels (not petrol) such as  
E-15 (15% alcohol), E-20 (20% alcohol), E-85 (85%  
alcohol) are NOT classified as petrol and are NOT  
approved for use in 2-stroke petrol engines. Use of  
alternative fuels will cause problems such as:  
improper clutch engagements, overheating, vapor  
lock, power loss, lubrication deficiency, deterioration  
of fuel lines, gaskets and internal carburetor  
components, etc. Alternative fuels cause high  
moisture absorption into the fuel/oil mixture leading  
to oil and fuel separation.  
NOTE: Detach the shoulder harness from the unit before  
starting engine.  
Fig. 6A  
Fig. 6B  
MB 305 CBS  
Gearbox  
Shield  
C
C
Dust cup  
Threaded  
shaft  
FUEL AND LUBRICATION  
s  
Fig. 6C  
Fig. 6D  
Fig. 8A  
E
Fig. 8B  
FUEL AND LUBRICATION  
D
Retaining washer  
Fuel & Oil Mix  
40:1 (2.5%)  
PUSH  
Fig. 8C  
Blade  
WARNING: Never use straight petrol in  
your unit. This will cause permanent engine  
damage and void the manufacturer’s warran-  
ty for that product. Never use a fuel mixture  
that has been stored for over 30 days.  
MT 305 CPS  
Cupped washer  
Nut  
MB 305 CBS  
D
Wrench  
NOTE: Make sure all parts are in place as illustrated,  
and the blade is sandwiched between the dust cup and  
the retaining washer. There should be no space between  
the blade and the dust cup or the retaining washer.  
WARNING: If 2-cycle lubricant other than  
FUEL / OIL MIXTURE RATIOS  
McCulloch Custom Lubricant is to be used,it must  
Petrol - Litre  
Two-Stroke Oil - ml  
be a premium grade oil for 2-cycle air  
cooled  
Fig. 8D  
OPERATING POSITION  
engines mixed at a 40:1 ratio. Do not  
use any  
40:1 (2.5%)  
2-cycle oil product with a recommended mi-  
xing ratio of 100:1.If insufficient lubrication is  
the cause of engine damage, it voids the  
manufacturer’s engine warranty.  
6. Align hole in dust cup with hole in side of gearbox by  
rotating the blade.  
7. Insert a small screwdriver into aligned holes. This will  
keep the shaft from turning while tightening the blade  
nut.  
ALWAYS WEAR:  
Safety helmet  
Eye protection  
2
5
10  
50  
125  
250  
Hearing  
protection  
8. Tighten blade nut firmly with wrench (provided) while  
holding screwdriver in position.  
WARNING: Lack of lubrication voids engine war-  
ranty. Fuel and oil must be mixed at 40:1.  
Heavy,  
long pants  
9. Remove the screwdriver.  
10. Turn blade by hand. If the blade binds against the  
shield, or appears to be uneven, the blade is not  
centered, and you must reinstall.  
Boots  
NOTE: To remove blade, insert screwdriver into aligned  
holes. Unthread the nut (clockwise direction) and remove  
parts. Be sure to store parts and instructions for future  
use.  
Cut from your right to your left.  
7
8
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-
-
The line will easily remove grass and weeds from  
When operating unit, clip shoulder strap onto clamp, stand  
as shown and check for the following:  
TRIMMER INSTRUCTIONS  
A
around walls, fences, trees and flower beds, but it  
also can cut the tender bark of trees or shrubs and  
scar fences.  
For trimming or scalping, use less than full throttle to  
increase line life and decrease head wear,  
especially:  
OPERATING INSTRUCTIONS FOR USE  
WITH TRIMMER HEAD  
-
-
Wear eye protection and heavy clothing.  
Extend your left arm and hold loop handle with your  
left hand.  
WARNING: Always wear eye protection. Never lean  
over the trimmer head. Rocks or debris can ricochet or  
be thrown into eyes and face and cause blindness or  
other serious injury.  
Before trimming, bring engine to a speed sufficient to cut  
material to be trimmed.  
When cutting grass, engine RPM should be maintained  
at a level where the trimmer line cuts grass cleanly  
without overloading or slowing the engine.  
Always release the throttle trigger and allow the engine  
to return to idle speed when not cutting.  
To stop engine:  
-
Hold throttle grip with your right hand with finger on  
throttle trigger.  
- During light duty cutting.  
-
-
Keep unit below waist level.  
Keep shoulder strap pad centered on your left  
shoulder.  
Fig. 9C  
Fig. 9D  
Fig. 9F  
Fig. 9H  
- Near objects around which the line can  
wrap such as small posts, trees or fence  
wire.  
For mowing or sweeping, use full throttle for a good  
clean job.  
A
MT 305 CPS  
-
-
Maintain full weight of tool on your left shoulder.  
Without bending over, keep the blade or trimmer  
head near and parallel to the ground and not  
crowded into material being cut.  
C
-
B
A
TRIMMING - Hold the bottom of the trimmer head about  
8 cm above the ground and at an angle. Allow only the  
tip of the line to make contact. Do not force trimmer line  
into work area.  
MB 305 CBS  
STARTING A COLD ENGINE  
B
NOTE: To minimize load on engine during starting and  
warm-up, trim excess cutter line to 13cm (Fig. 9A).  
1. Press ON/OFF switch to the “RUN (I)” position  
(Fig.9B).  
-
-
Release the throttle trigger.  
Push and hold the ON/STOP switch in the STOP  
position until the engine stops.  
Fig. 9E  
Trimming  
TRIMMER LINE ADVANCE  
2. Your unit is designed with a 3 position choke: FULL  
CHOKE “ ”, HALF CHOKE “ ”, and RUN “ ”.  
Move choke lever to FULL CHOKE “ ” position  
(Fig. 9C).  
Advance line by tapping the bottom of the cutting head  
lightly on the ground while engine is running at full  
speed. The metal line limiter blade attached to the guard  
will cut the line to the proper length.  
WARNING: Use only 2,4 mm diameter line. Other  
sizes of line will not advance properly and will result in  
improper cutting head function or can cause serious  
injury. Do not use other materials such as wire, string,  
rope, etc. Wire can break off during cutting and become  
a dangerous missile that can cause serious injury.  
3a. For “P” handle “  
”, squeeze throttle trigger to full  
position.(MT 305 CPS)  
8 cm above  
ground  
Fig. 9G  
3b. For Bike handle “  
”, set throttle lock (C): Press  
the lockout switch (A) down and then holding trigger  
(B) at partially open position, press down and hold  
throttle lock (C). Release throttle trigger (B). Throttle  
trigger (B) will now remain in the partially depressed  
position (Fig. 9B). (MB 305 CBS)  
SCALPING - The scalping technique removes unwanted  
vegetation down to the ground. Hold the bottom of the  
trimmer head about 8 cm above the ground and at an  
angle. Allow the tip of the line to strike the ground  
around trees, posts, monuments, etc. This technique  
increases line wear.  
WARM ENGINE START  
1. Move switch to the “RUN” position (Fig. 10A).  
2. Place choke in HALF CHOKE “ ” position (Fig. 10B).  
3. Grasp throttle handle firmly, squeeze throttle trigger  
to FULL position.  
4. Pull starter rope briskly until engine starts, but no  
more than 6 times. Keep throttle at FULL position until  
engine runs smoothly.  
5. If engine does not start, place choke in RUN “ ” posi-  
tion and pull starter rope 5 more times. If engine still  
does not start it is probably flooded. Wait 5 minutes  
and repeat procedure with choke in RUN “ ” position  
and throttle full open.  
4.  
5.  
6.  
Press the primer bulb (A) 10 times (Fig. 9D).  
CUTTING METHODS  
Wait 10 sec.  
WARNING: Do not crowd the line when cutting around  
hard objects (rock, gravel, fence posts, etc.), which can  
damage the trimmer head, become entangled in the line,  
or be thrown causing a serious hazard.  
A smooth rapid pull is required for a strong spark. Pull  
Scalping  
starter rope briskly maximum 6 times. (Fig. 9F) As  
soon as the engine sounds as if it is trying to start  
(even if less than 6 pulls) then move the choke lever  
to HALF CHOKE “ ” position.(Fig. 9G)  
Pull starter rope again while trigger is in the full throttle  
position until engine starts. (Fig. 9F)  
Once engine is started, leave the choke lever in the  
HALF CHOKE “ ” position for 20 seconds, then move  
choke lever to RUN “ ”. (Fig. 9H)  
-
The tip of the line does the cutting. You will achieve  
the best performance and minimum line wear by not  
crowding the line into the cutting area. The right and  
wrong ways are shown below.  
7.  
8.  
Tip of line does  
the cutting.  
Line crowded into  
work area.  
MOWING - Your trimmer is ideal for mowing in places  
conventional lawn mowers cannot reach. In the mowing  
position, keep the line parallel to the ground. Avoid  
pressing the head into the ground as this can scalp the  
ground and damage the tool.  
If engine does not start, go back to step 2.  
NOTE: If engine fails to start after repeated attempts, refer  
to Troubleshooting section.  
NOTE: Always pull starter rope straight out. Pulling starter  
at an angle will cause rope to rub against the eyelet. This  
friction will cause the rope to fray and wear more quickly.  
Always hold starter handle when rope retracts. Never  
allow rope to snap back from extended position. This  
could cause rope to snag or fray and also damage the  
starter assembly.  
A
MB 305 CBS  
MT 305 CPS  
Mowing  
Fig. 10A  
Fig. 10B  
TO STOP ENGINE  
Release throttle trigger. Let engine return to idle. Push and  
hold ignition stop switch until engine stops.  
13cm  
MB 305 CBS  
C
A
For blade  
100-400mm  
For String  
Head  
0-300mm  
MT 305 CPS  
B
Fig. 9A  
Fig. 9B  
10  
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unit. The uncontrolled unit can cause serious injury if  
the blade contacts the operator or others.  
SWEEPING - The fanning action of the rotating line can  
be used to blow away loose debris from an area. Keep  
the line parallel to and above the area surface and swing  
the tool from side to side.  
WARNING: The operator or others must not try to  
clear away cut material with the engine running or  
the blade turning to avoid serious injury. Stop  
engine and blade before removing materials  
wrapped around blade or shaft.  
2. Remove any remaining line.  
3. Clean dirt and debris from all parts. Replace spool if it  
is worn or damaged.  
4. Replace with a pre-wound spool, or replace line using  
a 4,5 metres length of 2,4 mm diameter McCulloch  
brand line.  
WARNING: Never use wire, rope, string, etc.,  
which canbreak off and become a dangerous  
missile.  
WHEN BLADE THRUST OCCURS - Blade Thrust  
can occur without warning if the blade snags, stalls, or  
binds. This is more likely to occur in areas where it is  
difficult to see the material being cut. By using the unit  
properly, the occurrence of blade thrust will be  
reduced and the operator will be less likely to lose  
control.  
Sweeping  
MAINTENANCE INSTRUCTIONS  
REPLACING THE LINE  
1. Press the tabs on the side of the trimmer head and  
remove cover and spool.  
5. When installing new line on an existing spool, hold the  
spool as shown.  
6. Bend the line at the midpoint and insert the bend into  
the slot in the center rim of the spool. Ensure line  
snaps into position in the slot.  
TRIMMING PROCEDURES  
When properly equipped with a cutting attachment guard  
and cutting head, your unit will trim unsightly weeds and  
tall grass in those hard-to-reach areas - along fences,  
walls, foundations and around trees. It can also be used for  
scalping to remove vegetation down to the ground for eas-  
ier preparation of a garden or to clean out a particular area.  
NOTE: Even with care, trimming around foundations, brick  
or stone walls, curves, etc., will result in above normal  
string wear.  
Cut only grass, weeds, and woody brush up to 1 cm in  
diameter with the weed blade. Do not let the blade  
contact material it cannot cut such as stumps, rocks,  
fences,metal, etc., or clusters of hard, woody brush  
having a diameter greater than 1 cm.  
Keep the blade sharp. A dull blade is more likely to  
snag and thrust.  
Cut only at full throttle. The blade will have maximum  
cutting power and is less likely to bind or stall.  
“Feed” the blade deliberately and not too rapidly. The  
blade can thrust away if it is fed too rapidly.  
The grass is cut down with a sideways, swinging  
movement, where the movement from right-to-left is  
the cutting stroke and the movement from left-to-right  
is the return stroke. Let the left-hand side of the blade  
do the cutting.  
TRIMMING / MOWING  
Swing trimmer with a sickle-like motion from side to side.  
Do not tilt the cutting head during the procedure.Test area  
to be trimmed for proper cutting height. Keep cutting head  
at same level for even depth of cut (Fig. 12A).  
Tab  
Tab  
7. With your finger between the lines, wrap the lines  
evenly and firmly around the spool in a clockwise  
direction.  
Use the shoulder strap and keep a firm grip on the unit  
with both hands. A properly adjusted shoulder strap  
will support the weight of the unit, freeing your arms  
and hands to control and guide the cutting motion.  
Keep feet comfortably spread apart and braced for a  
possible sudden, rapid thrust of unit. Do not  
overreach. Keep firm footing and balance.  
Keep blade below waist level; it will be easier to  
maintain control of unit.  
Do not raise the engine above your waist as the blade  
can come dangerously close to your body.  
Do not swing unit with such force that you are in  
danger of losing your balance.  
C
Spool  
Fig. 12A  
8. Position the lines in the guide slots.  
Guide slot  
OPERATING INSTRUCTIONS FOR USE WITH  
WEED BLADE  
Bring the engine to cutting speed before entering the  
material to be cut. If the blade does not turn when you  
squeeze the throttle trigger, make sure shaft is fully  
inserted into the engine.  
Always release the throttle trigger and allow engine to  
return to idle speed when not cutting. The blade should  
not turn while the engine is running at idle. If the blade  
turns at idle, do not use your unit. Refer to the  
CARBURETOR ADJUSTMENT section or contact your  
authorized service dealer.  
Blade Thrust is a reaction that only occurs when  
using a bladed unit. This reaction can cause serious  
injury. Carefully study this section. It is important that  
you understand what causes blade thrust, how you  
can reduce the chance of its occurring, and how you  
can remain in control of unit if blade thrust occurs.  
WHAT CAUSES BLADE THRUST - Blade Thrust  
can occur when the spinning blade contacts an object  
that it does not cut. This contact causes the blade to  
stop for an instant and then suddenly move or “thrust”  
away from the object that was hit. The “thrusting”  
reaction can be violent enough to cause the operator  
to be propelled in any direction and lose control of the  
Guide slot  
Maintain good firm footing while using the unit. Do this  
by planting feet firmly in a comfortable apart position.  
Cut while swinging the upper part of your body from  
right to left.  
As you move forward to the next area to cut, be sure  
to maintain your balance and footing.  
11  
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STORING A UNIT  
Fuel Cap / Filter  
9. Place the spool in the cover as shown below.  
BLADE REPLACEMENT  
Refer to the ASSEMBLY section for blade replacement  
instructions and illustrations.  
CAUTION: Remove fuel from unit and store  
WARNING: Failure to follow these steps  
in approved container before starting this  
procedure. Open fuel cap slowly to release  
any pressure which may have formed in fuel  
tank.  
may cause varnish to form in the carburetor  
and difficult starting or permanent damage  
following storage.  
CARBURETOR ADJUSTMENT  
WARNING: Keep others away when making idle speed  
adjustments. The trimmer head will be spinning during  
most of this procedure. Wear your protective equipment  
and observe all safety precautions. After making  
adjustments, the trimmer head must not move/spin at idle  
speed. The carburetor has been carefully set at the  
factory. Adjustments may be necessary if you notice any  
of the following conditions:  
1. Perform all the general maintenance recommended  
in the Maintenance Section of your User Manual.  
2. Clean exterior of engine, Output Shaft, cutting attach-  
ment guard and cutting head.  
3. Drain fuel from the fuel tank.  
4. After fuel is drained, start engine.  
5. Run engine at idle until unit stops. This will purge the  
carburetor of fuel.  
6. Allow engine to cool (approx. 5 minutes).  
7. Using a spark plug wrench, remove the spark plug.  
1.  
Completely remove fuel cap (A) from fuel tank (B)  
to be able to remove fuel filter (D) from tank. Use a  
piece of wire (C) with a hook formed at the end to  
pull filter out of tank. (Fig. 17A & Fig. 17B)  
Pull filter (D) off with a twisting motion.  
2.  
3.  
Replace fuel filter (D). (Fig. 17C)  
NOTE: Never operate the trimmer without the fuel filter.  
Internal engine damage could result!  
10. Insert the ends of the lines through exit holes in the  
sides of the cover.  
-
-
Engine will not idle when the throttle is released.  
The trimmer head moves/spins at idle speed.  
Line exit hole  
C
A
Make adjustments with the unit supported so the cutting  
attachment is off the ground and will not make contact  
with any object. Hold the unit by hand while running and  
making adjustments. Keep all parts of your body away  
from the cutting attachment and muffler.  
8. Pour  
1
teaspoon of clean 2-cycle oil into the  
combustion chamber. Pull starter rope slowly several  
times to coat internal components. Replace spark  
plug.  
9. Store unit in a cool, dry place away from any source  
of ignition such as an oil burner, water heater, etc.  
Idle Speed Adjustment  
B
Allow engine to idle. Adjust speed until engine runs  
without trimmer head moving or spinning (idle speed too  
fast) or engine stalling (idle speed too slow).  
REMOVING A UNIT FROM STORAGE  
1. Remove spark plug.  
2. Pull starter rope briskly to clear excess oil from com-  
bustion chamber.  
3. Clean and gap spark plug or install a new spark plug  
with proper gap.  
4. Prepare unit for operation.  
5. Fill fuel tank with new, fresh fuel / oil mixture. See  
Fuel and Lubrication Section.  
ver  
Fig. 17A  
Fig. 17B  
-
Turn idle speed screw clockwise to increase engine  
speed if engine stalls or dies.  
11. Reinstall the spool and cover onto the trimmer head.  
Push until cover snaps into place.  
-
Turn idle speed screw counterclockwise to decrease  
engine speed if trimmer head moves or spins at idle  
speed.  
D
WARNING: Recheck the idle speed after each  
adjustment. The trimmer head must not move or spin at  
idle speed to avoid serious injury to the operator or  
others.  
Fig. 17C  
CARBURETOR ADJUSTMENT  
The carburetor was pre-set at the factory for optimum per-  
formance. If further adjustments are necessary, please  
take your unit to the nearest Authorized Service Center.  
AIR FILTER  
CAUTION: NEVER operate trimmer without  
the air filter. The air filter must be kept clean.  
If it becomes damaged, install a new filter.  
SPARK PLUG  
1. Spark plug gap = .025" (.635mm) (Fig. 18).  
2. Torque to 105 to 130 inch pounds (12 to 15 N•m).  
To Clean Air Filter:  
1. Remove knob (A) holding air filter cover in place,  
remove cover (B) and lift filter (C) from air box (Fig.  
16).  
Connect spark plug boot.  
2. Wash filter in soap and water. DO NOT USE PETROL!  
F
E
3. Air dry filter.  
4. Reinstall filter.  
NOTE: Replace filter if frayed, torn, damaged or unable to  
be cleaned.  
B
A
C
Fig. 18  
Fig. 19  
CUTTING ATTACHMENT GUARD KNIFE  
SHARPENING  
1. Remove cutter knife (A) from cutting attachment guard  
(B) (Fig. 19).  
2. Place knife in a bench vise. Sharpen knife using a flat  
file, being careful to maintain the angle of cutting  
edge. File in one direction only.  
Fig. 16  
13  
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TROUBLE SHOOTING THE ENGINE  
EC DECLARATION OF CONFORMITY  
PROBLEM  
PROBABLE CAUSE  
CORRECTIVE ACTION  
Unit won’t start or starts but will not run.  
Incorrect starting procedures.  
Incorrect carburetor mixture adjustment  
setting.  
Follow instructions in the User Manual.  
Have carburetor adjusted by an Authorized  
Service Center.  
Business name of the manufacturer: Husqvarna AB  
Fouled spark plug  
Clean / gap or replace plug.  
Replace fuel filter.  
Full address of the manufacturer:  
SE-561 82 Huskvarna, Sweden  
Fuel filter blocked.  
We declaring that the machinery  
Product name:  
Commercial name:  
Function:  
Unit starts, but engine has low power.  
Incorrect lever position on choke.  
Dirty spark arrester screen.  
Dirty air filter.  
Move to RUN position.  
Grass trimmer, Petrol  
Gasoline trimmer  
Trimming grass  
Replace spark arrester screen.  
Remove, clean and reinstall filter.  
Have carburetor adjusted by an Authorized  
Service Center.  
Incorrect carburetor mixture adjustment  
setting.  
Model:  
MT 305 CPS/MB 305 CBS  
Type:  
Powered by petrol  
Engine hesitates.  
No power under load.  
Incorrect carburetor mixture adjustment  
setting.  
Have carburetor adjusted by an Authorized  
Service Center.  
Runs erratically.  
Incorrectly gapped spark plug.  
Clean / gap or replace plug.  
Fulfils all the relevant provisions of Directives  
2006/42/EC, 2004/108/EC, 2000/14/EC+2005/88/EC,  
97/68/EC+2004/26/EC, 2011/65/EU  
Smokes excessively.  
Incorrect carburetor mixture adjustment  
setting.  
Have carburetor adjusted by an Authorized  
Service Center.  
Incorrect fuel mixture.  
Use properly mixed fuel (40:1 mixture).  
and tested in accordance with below standards  
EN ISO 11806:2011  
EN ISO 14982:2009  
Person authorised to compile the technical file and making  
this declaration:  
Name,surname  
Position/Title  
: Bo R Jonsson  
: R&D Manager  
Address  
: SE-561 82 Huskvarna, Sweden  
Place and date of the declaration: Shanghai, PRC  
2012/7/30  
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