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MODELS: M40B M40SPB M46B M46SPB
COBRA LAWN MOWER
OWNERS MANUAL
Cobra Garden Machinery
Henton and Chattell Ltd., London Road, Nottingham NG2 3HW UK
www.cobragarden.co.uk
2
CONTENTS
SECTION 1 SYMBOLS MARKED ON THE PRODUCT...........................................3
SECTION 2 GENERAL SAFETY RULES................................................................3-5
SECTION 3 PARTS DESCRIPTION.......................................................................5-9
SECTION 4 TECHNICAL DATA.............................................................................9-10
SECTION 5 ASSEMBLY........................................................................................10-13
SECTION 6 3 IN 1……..........................................................................................13-14
SECTION 7 OPERATION INSTRUCTIONS ........................................................14-18
SECTION 8 MAINTENANCE INSTRUCTIONS…………………………………..18
SECTION 9 LUBRICATION..................................................................................19
SECTION 10 CLEANING........................................................................................19-20
SECTION 11 STORAGE INSTRUCTIONS (OFF SEASON)……………………...20-21
SECTION 12 TROUBLESHOOTING……………………………………………..….21
SECTION 13 WARRANTY................................................................................ ..22
SECTION 14 ENVIRONMENT..............................................................................22
SECTION 15 EC-DECLARATION OF CONFORMITY..........................................22-23
3
WARNING
For your own safety please read this manual before attempting to operate your new mower. Failure to follow
instructions can result in serious personal injury. Spend a few moments to familiarise yourself with your
mower before each use.
1. SYMBOLS MARKED ON THE PRODUCT
Fig. A
B.1 Read Operator's Manual.
B.2 Keep bystanders away.
B.3 Pay attention to the operator's hands and feet to avoid injury.
B.4 Fuel is flammable, keep fire away. Do not add fuel with running machine.
B.5 Toxic fumes; don’t operate indoors, including your garage or shed.
B.6 When mowing, please wear protective glasses and ear plugs to defend the operator himself.
B.7 When repairing, please remove the spark plug, before undertaking repair work according to the
operational manual.
B.8 Caution: Engine hot.
Figure B: Safety Label Found On Lawn Mower: KEEP HANDS AND FEET AWAY.
2. GENERAL SAFETY RULES
WARNING: When using petrol tools, basic safety precautions, including the following, should always be
followed to reduce the risk of serious personal injury and/or damage to the unit. Read all these instruction
before operating this product and retain these instructions for future reference.
WARNING: This machine produces an electromagnetic field during operation. This field 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 physician and the medical implant manufacturer
before operating this machine.
4
Training
1. Before using the lawnmower read the instructions carefully. Familiarise yourself with the controls and
pay particular attention in learning how to stop the machine in an emergency.
2. Never allow children or people unfamiliar with these instructions to use the lawn mower. Local
regulations can restrict the age of the operator.
3. Never mow while people, especially children or pets are nearby.
4. Never use the mower if the operator is taking medicine or substances that could affect or impair his
ability to react or concentrate.
5. Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people
or their property.
Before you start
1. While mowing, always wear substantial footwear and long trousers. Do not operate the equipment
when barefoot or wearing open toed sandals.
2. Thoroughly inspect the area where the equipment is to be used and remove all objects which can
damage or be thrown by the machine.
3. WARNING - Petrol is highly flammable.
- Store fuel in containers specifically designed for this purpose.
- Refuel outdoors only and do not smoke while refuelling; add fuel before starting the engine.
- Never remove the cap of the fuel tank or add petrol while the engine is running or when the engine is
hot.
- If petrol is spilled, do not attempt to start the engine, but move the machine away from the area of
spillage and avoid creating any source of ignition until petrol vapours have dissipated.
- Replace all fuel tank and container caps securely.
4. Replace faulty silencers.
5. Before using, always visually inspect to see that the blade, blade bolts and cutter assembly are not
worn or damaged. Replace worn or damaged blades and bolts in sets to preserve balance.
Operation and Caution
1. Do not operate the engine in a confined space where dangerous carbon monoxide fumes can collect,
refuel outdoors only.
2. Mow only in daylight or in good artificial light.
3. Avoid operating the equipment in wet grass, where feasible.
4. Always be sure of your footing on slopes.
5. Walk, never run, always be in control of the lawnmower and never allow yourself to be pulled along.
6. For wheeled rotary machines, mow across the face of slopes, never up and down.
7. Exercise extreme caution when changing direction on slopes.
8. Do not mow excessively steep slopes of more 20°
9. Use extreme caution when reversing or pulling the lawn mower towards you.
10. Stop the blade if the lawn mower has to be tilted for transportation when crossing surfaces other than
grass, and when transporting the lawn mower to and from the area to be mowed
11. Never operate the lawn mower with defective guards, or without safety devices, for example
deflectors and/or grass catchers, in place.
12. Do not change the engine governor settings or over speed the engine.
13. Before starting the engine disengage all blades and drive clutches.
14. Keep your feet well away from the blade when starting the engine and in accordance with the
instructions.
15. Do not tilt the lawn mower when starting the engine and always start on a flat surface free from long
grass.
5
16. Do not start the engine when standing in front of the discharge chute.
17. Never put hands or feet near or under rotating parts. Keep clear of the discharge opening at all times.
18. Always ensure the engine is fully switched off before picking up/carrying the Lawnmower.
19. Stop the engine and disconnect the spark plug wire, make sure that all moving parts have come to a
complete stop and, where a key is fitted remove the key, make sure engine has had time to cool.
- Before unclogging chute and clearing blockages.
- Before checking, cleaning or working on the lawn mower.
- After striking a foreign object. Inspect the lawnmower for damage and make repairs before restarting.
- If the lawn mower starts to vibrate abnormally (check immediately).
20. Stop the engine and disconnect the spark plug wire, make sure that all moving parts have come to a
complete stop and, where a key is fitted remove the key, make sure engine is completely cooled.
- Whenever you leave the lawn mower.
- Before refuelling.
21. Reduce the throttle setting during engine shut down and, if the engine is provided with a shut-off valve,
turn the fuel valve off at the conclusion of mowing.
Maintenance and Storage
1. Keep all nuts, bolts and screws tight to be sure the equipment is in safe working condition.
2. Never store the equipment with petrol in the tank inside a building where fuel vapours can reach an
open flame or spark or where the temperature is high.
3. Before storage allow the engine to cool.
4. To reduce the fire hazard, keep the engine, silencer, battery compartment and petrol storage area
free of grass, leaves, or excessive grease.
5. Check the grass catcher and deflector frequently for wear or deterioration.
6. Replace worn or damaged parts for safety. Genuine parts should always be used as parts of
inferior quality can damage the equipment and compromise safety.
7. If the fuel tank has to be drained, this should be done outdoors. Always ensure engine is completely
cooled before starting this task.
8. If the blade needs to be removed, wear strong gloves to prevent injury to hands and fingers. Check the
blades balance after sharpening.
9. When transporting the machine make sure you close the fuel cut off. Be careful to ensure weight is
evenly distributed. Wear strong gloves.
10. When tilting the machine never tilt towards the air filter as this may become damaged with fuel.
11. Never crank the engine when the spark plug is removed.
12. Frequently check the fuel lines and fittings for damage and cracks, replace if necessary
13. Never start the engine with the air filter cover removed.
14. Carefully clean the mower and grass bag after use to remove debris as this can damage and corrode.
Fertilisers and top dressings are particularly corrosive.
15. In time your chassis may peel because of the abrasive action of the debris making contact. This can
be remedied by touching up paintwork where necessary to prevent corrosion.
Warning: Do not touch rotating blade.
Warning: Refuel in a well ventilated area with the engine stopped.
6
3. PARTS DESCRIPTION
Fig.1
1. Upper handle 2. Self-drive Lever (SPB) 3. Starter handle 4. Rope Guide
5. Locking Lever 6. Grass catcher 7. Height adjusting lever 8. Oil cap
9. Deck 10. Spark plug 11. Fuel cap 12. Cable clamp
13. Throttle choke Lever 14. Brake control handle
Including
A: Spark plug wrench
4. TECHNICAL DATA
Model
M40B
M40SPB
M46B
M46SPB
Engine type
Briggs 450E
Briggs 450E
Briggs 450E
Briggs 500E
Self Propelled
No
Yes
No
Yes
Engine Displacement
125 cm
3
125 cm
3
125 cm
3
140 cm
3
Blade Width
400 mm
400 mm
460 mm
460 mm
Rated Speed
2800/min
2800/min
2800/min
2800/min
Fuel Tank Capacity
0.75L
0.75L
0.75L
0.75L
Grass catcher capacity
50 L
50 L
60 L
60 L
Net Weight
24 kg
26 kg
25.6 kg
28.3 kg
Height adjustment :
Guaranteed Sound pressure level at the operator’s position
(According to EN 836 Annex H & EN ISO 4871)
85.1 dB(A)
(K=3dB(A))
Measured sound power level
Guaranteed Sound Power level
(According to 2000/14/EC)
93.5 dB(A)
K=1.91dB(A)
96 dB(A)
Vibration
(According to EN 836 Annex G)
Max.6.38m/s²
K=1.5 m/s²
7
5. ASSEMBLY
5.1 FOLDING HANDLE
1. Fix the lower handlebars into the unit body with a suitable spanner. (Fig.2F)
2. Lift the two locking levers to release the upper handlebars for folding.
3. Push the locking lever closed or tighten the knobs to lock the handlebars in the operating position. (Fig.2G/Fig.2H)
4. Adjust the tension by turning the lock nut with a suitable spanner.
5. Attach the cable-clamp to the position shown and then attach the cable. (Fig.2I)
Fig.2F Fig.2G
Fig.2H Fig.2I
5.2 MOUNTING AND DISMOUNTING THE GRASS CATCHER
a) To fit: Raise the rear cover and hitch the grass catcher on rear of mower. (Fig. 3G/3H)
b) To remove: grasp and lift the rear cover, remove grass catcher. (Fig. 3G/3H)
Fig.3G Fig.3H
Lock nut
8
5.3 STARTER HANDLE
Move the starter handle from the engine to the rope guide.
Fig.4
5.4 HEIGHT OF CUT
Apply outward pressure to disengage lever from rack. Move lever forward or back to adjust height. (see clause 7.9)
Fig.5C
7. OPERATING INSTRUCTIONS
7.1 BEFORE STARTING
Service the engine with petrol and oil as instructed in the separate engine manual packed with your mower. Read instructions
carefully.
WARNING! Petrol is highly flammable.
Store fuel in containers specifically designed for this purpose. Refuel outdoors only, do not smoke while refueling or handling fuel.
Never remove the cap of the fuel tank or add petrol while the engine is running or when the engine is hot. If petrol is spilled, do
not attempt to start the engine but move the machine away from the area of spillage and avoid creating any source of ignition until
petrol vapours have dissipated. Replace all fuel tanks and container caps securely.
Before tipping the lawn mower to maintain the blade or drain oil, remove fuel from tank.
WARNING: never fill fuel tank indoors, with engine running or until the engine has been allowed to cool for at least 15
minutes after running.
9
7.2 TO START ENGINE AND ENGAGE BLADE
-Always check the engine oil level before starting. Refer to the engine manual.
1. The unit is equipped with a rubber boot over the end of the spark plug, make certain the metal loop on the end of the spark plug
wire (inside the rubber boot) is fastened securely over the metal tip on the spark plug.
2. When starting cool, press the primer bulb 3-5 times before starting the engine. (Fig.8A)
3. Cold engine starting: Turn the throttle choke lever to “ ” position, full speed. When starting a warm engine, turn the throttle
choke lever to the middle position. (Fig.8B)
4. Standing behind the mower, grasp the brake control handle and hold it against the upper handle as shown in Fig.8C.
5. Hold the starter handle as shown Fig.8C and pull up rapidly. Return it slowly to the rope guide bolt after engine starts.
Release the brake control handle to stop the engine and blade.
Fig.8A Fig.8B Fig. 8C
Start the engine carefully according to instructions and with feet well away from the blade.
Do not tilt the lawn mower when starting the engine. Start the mower on a level surface, free of high grass or obstacles.
Keep hands and feet away from the rotating parts. Do not start the engine when standing in front of the discharge opening.
7.3 OPERATION PROCEDURES
During operation, tightly hold the stop control handle with both hands.
Note: During operation, when the brake control handle is released, the engine will stop and thus stopping the lawnmower
from operating.
7.4 TO STOP ENGINE
CAUTION: The blade continues to rotate for a few seconds after the engine is shut off.
1. Release the brake control handle to stop the engine and blade.
2. Disconnect and ground the spark plug wire as instructed in the separate engine manual to prevent accidental starting while
equipment is unattended.
Fig.9
14
12. TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Engine does not
start.
Throttle choke not in the correct position
for the prevailing conditions.
Move throttle choke to the correct position
Fuel tank is empty.
Fill the tank with fuel: refer to the ENGINE MANUAL.
Air filter element is dirty.
Clean air filter element: refer to the ENGINE MANUAL
Spark plug loose.
Tighten spark plug to 25-30Nm.
Spark plug wire loose or
disconnected from plug.
Install spark plug wire on spark plug.
Spark plug gap is incorrect.
Set gap between electrodes at 0.7 to 0.8mm
Spark plug is defective
Install new, correctly gapped plug: refer to the ENGINE
OWNERS MANUAL
Carburetor is flooded with fuel
Remove air filter element and pull starter rope
continuously until the carburetor clears itself and then
install the air filter element.
Faulty ignition module
Contact the service agent.
Engine difficult to
start or loses
power.
Dirt, water, or stale fuel tank.
Drain fuel and clean tank. Fill tank with clean, fresh fuel
Vent hole in fuel tank cap is plugged.
Clean or replace fuel tank cap.
Air filter element is dirty.
Clean air filter element.
Engine operates
erratically.
Spark plug is defective.
Install new, correctly gapped plug: refer to the ENGINE
OWNERS MANUAL
Spark plug gap is incorrect.
Set gap between electrodes at 0.7 to 0.8mm
Air filter element is dirty.
Clean air filter element: refer to the ENGINE OWNERS
MANUAL
Engine idles
poorly.
Air fliter element is dirty.
Clean air filter element: refer to the ENGINE OWNERS
MANUAL
Air slots in engine shroud are blocked.
Remove debris from slots.
Cooling fins and air passages under
engine blower housing are blocked.
Remove debris from cooling fins and air passages.
Engine skips at
high speed.
Gap between electrodes of spark plug are
too close.
Set gap between electrodes at 0.7 to 0.8mm
Engine overheats
Cooling air flow is restricted.
Remove any debris from slots in shroud, blower housing,
and air passages
Incorrect spark plug.
Install QC12YC spark plug and cooling fins on engine
Mower vibrates
abnormally
Cutting assembly is loose.
Tighten blade
Cutting assembly is unbalanced
Balance or replace the blade
14


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cobra-m40spb
  • The clutch cable on my Cobra is either broken or stretched - how can I check it? I've taken 9 or 10 screws froma cover but cover won't move! Many thanks Gordon.

    gordon@ukinfoweb.com Submitted on 28-3-2022 at 17:40

    Reply Report abuse


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