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Cobra DG450, Owner'S Manual, Page: 13 / 15

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Cobra DG450 Owner'S Manual Download Page 13

 

 

- 12 - 

 

 

 

 

4. Carburetor 
A: Drain bolt 
B: Washer 

 

 

 

 

                                                                                         

 

Engine Oil 

1. Change the engine oil. 

2. Remove the spark plug. 

3. Pour a tablespoon (5 - 10 cc ) of clean engine oil into the cylinder. 

4. Pull the recoil starter several times to distribute the oil. 

5. Reinstall the spark plug. 

Clean fuel strainer 

 

Petrol is extremely flammable and is explosive under certain conditions Do not smoke or allow flames or sparks 

in the area. 

Remove the fuel strainer from the fuel tank and fuel line Clean the fuel strainer (remove dirt which has 

accumulated on the mesh, and check that the mesh is not broken anywhere). Reinstall the fuel strainer and fuel 

line. 

 

Storage precautions 

 

If you choose to store your engine with petrol in the fuel tank and in the carburetor, it is important to reduce the 

hazard of petrol vapor ignition. Only store your machine in a well ventilated indoor area. Store away from 

appliances that could cause a spark such as electric motors or where power tools are operated. Do not locate 

your machine close to an open flame such as a heater/boiler. Always store your machine with the fuel valve in an 
“off” position. 

Do not store your machine with high humidity as this can cause rust and corrosion.   

 

 

Keep the engine level in storage. Tilting can cause fuel or oil leakage. 

Removal from Storage 

 

Always fully check your machine before use. Check your engine as described in the “BEFORE OPERATION 

CHECKS

” section of this manual. 

If you drained your engine before storage, re-fuel using only fresh petrol. Do not use fuel stored in containers for long 

periods of time as petrol oxidizers and deteriorates which could cause difficulty when trying to start the engine.   

If the cylinder was coated with oil during storage preparation, the engine will smoke briefly at startup. This is normal. 

 

 

 

 

Summary of Contents for DG450

Page 1: ...ENGINES OWNER S MANUAL Model DG450 ...

Page 2: ...f Maintenance 5 Maintenance Safety 5 Safety Precautions 6 Maintenance Schedule 6 Refueling 6 Fuel Recommendations 6 Engine Oil 7 8 Air Filter 9 Spark Plug 9 10 Fly Wheel Brake Inspection 10 Engine Adjustments 11 Adding a Fuel Stabiliser to Extend Fuel Storage Life 11 Draining the Fuel Tank and Carburetor 11 12 Transporting 13 TAKING CARE OF UNEXPECTED PROBLEMS 13 14 TECHNICAL CONSUMER INFORMATION ...

Page 3: ...ncy Before attempting to operate this equipment make sure the user receives adequate instruction and training This engine produces poisonous carbon monoxide from the exhaust Never run the engine indoors and always ensure there is adequate ventilation The engine and exhaust become very hot during operation Keep the engine at least 3 feet 1 meter away from buildings and other equipment during operat...

Page 4: ...this machinery indoors or where there isn t enough ventilation including your shed and garage Carbon Monoxide can build up quickly and cause unconsciousness and death Pay attention to the instructions provided with the equipment powered by this engine for any safety precautions that should be observed with engine startup shutdown or operation STARTING THE ENGINE Turn the fuel valve switch to the O...

Page 5: ...tive clockwise for electronic ignition operation 2 Engage the brake control handle grasp the starter grip handle and pull slowly until resistance is felt then pull cord rapidly to overcome compression prevent kickback and start engine B1 FLYWHEEL BRAKE MODELS Move the throttle to the choke position engage the starter control handle located on the equipment to release the flywheel brake The engine ...

Page 6: ... trouble free there is a maintenance schedule included in these instructions Routine and simple maintenance procedures can be carried out with simple hand tools by you the user if you feel confident to do so There are other service tasks that require specialist tools and are more difficult to carry out These are best handled by a professional and we would recommend that they are performed by a qua...

Page 7: ... to do so MAINTENANCE SHCEDULE 1 Service more frequently when used in dusty environments 2 Change the engine oil every 25 hours when used under heavy load or in high ambient temperatures 3 These items should be serviced by a Cobra authorized servicing dealer unless you have the proper tools and are mechanically proficient If you fail to carry out the above maintenance schedule it could result in n...

Page 8: ...anty Always use the specified fuel Never use stale or contaminated petrol or oil mixture Avoid getting dirt or water in the fuel tank Adding Fuel 1 Carefully remove the fuel tank cap 2 Fill the tank to the bottom of the fuel level limit in the neck of the fuel tank Wipe up spilled fuel before starting the engine Never overfill Fuel tank capacity DG450 0 32gal U S 1 2L DG550 0 53gal U S 2 0L Adding...

Page 9: ...high quality oil SAE30 and API SG SH OR SJ classification Drain the engine oil when the engine is warm warm oil drainsquickly and completely 7 Oil filler cap dipstick A Sealing washer B Drain bolt 1 Turn the fuel valve to the OFF position to reduce the possibility offuel leakage 2 Place a suitable container next to the engine to catch the used oil 3 Remove the drain boltand drain the oil into the ...

Page 10: ...e the air cleaner from the air filter base 3 Inspect the air filter elements Replace any damaged elements Clean or replace dirty elements Cleaning 1 Remove the air filter cover and foam element as described in the INSPECTION procedure 2 Remove the foam element from the air cleaner base 3 Tap the element several times on a hard surface to remove excess dirt Never try to brush off dirt brushing will...

Page 11: ...he spark plug by hand to avoid cross threading 6 Ensure the correct size wrench is used when tightening the washer 7 When installing a new spark plug tighten 1 2 turn after the spark plug seats to compress the washer 8 When reinstalling the original spark plug tighten 1 8 1 4 turn after the spark plug seats to compress the washer FLYWHEEL BRAKE INSPECTION 1 Check to see if the inspection screw is ...

Page 12: ...e you may need to have the carburetor and other fuel system components serviced or replaced The air in a partially filled fuel tank promotes fuel deterioration Very warm storage temperatures accelerate fuel deterioration Fuel problems may occur within a few months or even less if the petrol was not fresh when you filled the fuel tank Fuel system damage or engine performance problems resulting from...

Page 13: ...r ignition Only store your machine in a well ventilated indoor area Store away from appliances that could cause a spark such as electric motors or where power tools are operated Do not locate your machine close to an open flame such as a heater boiler Always store your machine with the fuel valve in an off position Do not store your machine with high humidity as this can cause rust and corrosion K...

Page 14: ...rol 2 Remove and inspect Spark plug Spark plug faulty fouled or Improperly gapped Spark plug wet with fuel flooded engine Replace the spark plug Dry and reinstall spark plug 3 Check choke Choke is opened Shut off choke well 4 Take engine to an authorized our Servicing dealer or refer to shop manual Fuel filter clogged carburetor malfunction ignition malfunction valves stuck etc Replace or repair f...

Page 15: ...r servicing dealer or referto shop manual Fuelfilter clogged carburetor malfunction ignition malfunction valves stuck etc Replace or repair faulty Components as necessary TECHNICAL CONSUMER INFORMATION TECHNICAL INFORMATION Serial Number Location A Serial number location Record the engine serial number in the space below You will need this information when ordering parts and when making technical ...

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