Maintenance (continued)
Cooling System
To maintain as low of an operating temperature as possible, the engine is equipped with a cooling system. The cooling sys- tem consists of:
1.An air intake on the starter unit.
2.Cooling fins on the flywheel.
3.Cooling fins on the cylinder.
4.A cylinder cover that leads cold air onto the cylinder.
Using a brush, clean the cooling system at least once a week. In difficult conditions, clean it more regularly.
Spark Plug
The condition of the spark plug is affected by:
•An incorrect carburetor setting
•An incorrect fuel mixture (too much faulty oil)
•A dirty air filter
These factors can cause deposits on the spark plug electrode. This may result in a malfunction or starting difficulties.
NOTE: If the unit is low on power, difficult to start, or runs poorly while idling, always check the spark plug first.
If the spark plug is dirty, clean it and check that it has a 0.5 mm electrode gap. Change the spark plug after one month of operation, or earlier.
NOTE: Always use the recommended type of spark plug. An incorrect spark plug can damage the cylinder and piston.
Air Filter
The air filter should be cleaned regularly to remove dust and dirt. This will help avoid:
•Carburetor malfunction
•Problems with starting
•Unnecessary wear to engine parts.
•Abnormal fuel consumption
Clean the filter after every 25 hours of operation, or more regularly if operating conditions are excessively dusty.
Cleaning the Air Filter
Dismantle the air filter cover and remove the air filter. Wash the filter in clean, warm soapy water. Ensure that the filter is dry before you refit it. An air filter that has been used for a long period of time can never become completely clean. From time to time, it is necessary to replace the filter with a new one. You must always replace a damaged air filter.
If you use your unit in dusty places, you should soak the air filter in oil.
Oiling the Air Filter
The air filter contains a solvent that enables the oil to spread evenly through- out the filter. Therefore, avoid skin contact with the filter.
To apply oil, place the fil- ter in a plastic bag and pour the oil over the filter. Knead the plastic bag to distribute the oil. Squeeze any excess oil out of the filter inside the plastic bag. Pour off the excess before you fit the filter into the unit.
Never use common engine oil. This could drain through the filter quickly and collect in the bottom.
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