Cobra DG350 Original Instructions Manual Download Page 8

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9.5 REFUELLING

Use unleaded gasoline with a pump octane rating of 86 or higher. This engine is certified to operate on

unleaded gasoline. Unleaded gasoline produces fewer engine and spark plug deposits and extends exhaust

system life.

WARNING:

Gasoline is highly flammable and explosive, and you can be burned or seriously injured when

refueling.

Stop engine and keep heat, sparks, and flame away.

Regular service period

Before

each use

First

month

or 5

hrs

Every 3

months

or 25 hrs

Every 6

months

or 50 hrs

Every

year or

100 hrs

Every

two

years

200hrs

Note

Item perform at every in
dictated month or
operating hour interval.
Whichever comes first

Engine oil

Check

√

Replace

necessar

√

Air cleaner

Check

Clean

√

Replace

√

Spark plug

Check-adju

Replace

necessar

√

Flywheel

brake pad

Check

Spark

arrester

Clean

necessar

Fuel tank

and filter

Clean

√

Shop

manual

Fuel tube

Check

Every 2 years

（

replace if necessary

）

Shop

manual

Valve

clearance

Check-adju

Not requires unless engine performance problems are noted

Shop

manual

Combustion

Chamber

Clean

After every 200 hours

Summary of Contents for DG350

Page 1: ...Engines Original Instructions Model DG350 Henton and Chattell Ltd London Road Nottingham NG2 3HW UK ...

Page 2: ...ON 4 SECTION 5 PRE OPERATION CHECKS 4 SECTION 6 OPERATIONS 4 SECTION 7 SPECIFICATIONS 6 SECTION 8 TUNE UP SPECIFICATIONS 7 SECTION 9 SERVICING YOUR ENGINE 7 SECTION 10 ENGINE ADJUSTMENT 14 SECTION 11 HELPFUL TIPS SUGGESTIONS 14 SECTION 12 TAKING CARE OF UNEXPECTED PROBLEMS 17 SECTION 13 TECHNICAL CONSUMER TECHNICAL INFORMATION 17 ...

Page 3: ...afety message is preceded by a safety alert symbol and one of three words DANGER WARNING or CAUTION These signal words mean DANGER You WILL be KILLED or SERIOUSLY HURT if you don t follow instructions WARNING You CAN be KILLED or SERIOUSLY HURT if you don t follow instructions CAUTION You CAN be HURT if you don t follow instructions Each message tells you what the hazard is what can happen and wha...

Page 4: ... problem before operation can cause a malfunction in which you can be seriously hurt or killed Always perform a preparation inspection before each operation and correct any problem Always check the following items before you start the engine 1 Fuel level 2 Oil level 3 Air cleaner 4 General inspection Check for fluid leaks and loose or damaged parts 5 Check the equipment powered by this engine Revi...

Page 5: ...sary when restarting a warm engine b Standing behind the unit grasp the brake control handle and hold it against the upper handle Fig 2B c Pull the starter grip slowly until resistance is felt and then pull rapidly to avoid kickback WARNING If you push the primer bulb too many times excessive fuel will flood the carburetor and the engine will be difficult to start Fig 2A Fig 2B CAUTION Do not allo...

Page 6: ...31 in 0 7 0 8 mm Refer to page 12 Valve clearance cold IN 0 06 0 02mm EX 0 08 0 02mm See your authorized dealer Other specifications No other adjustments needed 9 SERVICING YOUR ENGINE 9 1 THE IMPORTANCE OF MAINTENANCE Good maintenance is essential for safe economical and trouble free operation It will also help reduce pollution WARNING Improper maintenance or failure to correct a problem before o...

Page 7: ... any maintenance or repairs This will eliminate several potential hazards Carbon monoxide poisoning from engine exhaust Be sure there is adequate ventilation whenever you operate the engine Burns from hot parts Let the engine and exhaust system cool before touching Injury from moving parts Do not run the engine unless instructed to do so Read the instructions before you begin and make sure you hav...

Page 8: ...t month or 5 hrs Every 3 months or 25 hrs Every 6 months or 50 hrs Every year or 100 hrs Every two years or 200hrs Note Item perform at every in dictated month or operating hour interval Whichever comes first Engine oil Check Replace If necessar y Air cleaner Check Clean Replace Spark plug Check adju st Replace If necessar y Flywheel brake pad Check Spark arrester Clean If necessar y Fuel tank and...

Page 9: ...the fuel cap 5 Fuel tank capacity 0 8L 0 21US gallon Fig 4 9 6 ENGINE OIL 9 6 1 RECOMMENDED OIL Use 4 stroke motor oil that meets or exceeds the requirements for API service classification SH SJ or equivalent Always check the API service label on the oil container to be sure it includes the letters SH SJ or equivalent See Fig 5 Fig 5 SAE 10W 30 is recommended for general use Other viscosities show...

Page 10: ...er next to the engine to catch the used oil 2 Drain the oil into the container by slightly tipping the engine toward the oil filler cap dipstick after remove the drain bolt and sealing washer NOTE Please dispose of used oil in a manner that is compatible with the environment We suggest you take used oil in a sealed container to your local recycling center or service station for reclamation Do not ...

Page 11: ...the Warranty 9 7 1 INSPECTION See Fig 10 Fig 10 A Air cleaner case B Foam element C Air cleaner cover 1 Remove the air cleaner cover Be careful to prevent dirt and debris from falling into the air cleaner case 2 Remove the foam element from the air cleaner case 3 Inspect the air cleaner elements Replace any damaged elements Clean or replace dirty elements 9 7 2 CLEANING The air cleaner system uses...

Page 12: ...urn 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 WARNING A loose spark plug can become very hot and can damage the engine Over tightening the spark plug can damage the threads in the cylinder head 9 Attach the spark plug cap to the spark plug 9 9 FLYWHEEL BRAKE INSPECTION 1 Check...

Page 13: ...surfaces touch up any damaged paint and coat other areas that may rust with a light film of oil CAUTION Using a garden hose or pressure washing equipment can force water into the air cleaner or muffler opening Water in the air cleaner will soak the air filter and water that passes through the air filter or muffler can enter the cylinder causing damage 11 1 3 FUEL Gasoline will oxidize and deterior...

Page 14: ...ing fuel Stop engine and keep heat sparks and flame away Refuel only outdoors Wipe up spills immediately 1 Place an approved gasoline container below the carburetor and use a funnel to avoid spilling fuel 2 Remove the drain bolt and then move the fuel valve lever to the ON position 3 After all the fuel has drained into the container reinstall the drain bolt and washer Tighten the drain bolt secure...

Page 15: ...engine and exhaust system cool cover the engine to keep out dust A hot engine and exhaust system can ignite or melt some materials Do not use sheet plastic as a dust cover A nonporous cover will trap moisture around the engine promoting rust and corrosion 11 2 REMOVAL FROM STORAGE Check your engine as described in the PRE OPERATION Check section of this manual If the fuel was drained during storag...

Page 16: ...s stuck etc Replace or repair faulty components as necessary ENGINE LACKS POWER possible Cause Correction 1 check air cleaner Air cleaner elements clogged Clean or replace air cleaner elements 2 check fuel Bad fuel engine stored without treating or draining gasoline of refueled with bad gasoline Drain the fuel tank and carburetor refuel with fresh gasoline 3 take engine to an authorized our servic...

Page 17: ...r perform this carburetor modification This engine when operated at high altitudes with the carburetor modifications for high altitude use will meet each emission standard throughout its useful life 4 Even with carburetor modification engine horsepower will decrease about 3 5 for each 1 000 feet 300 meters increase in altitude The effect of altitude on horsepower will be greater than this if no ca...

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