Racing RAC5073T-1 Instruction Manual page 17

Spark plug
Check the spark plug initially after the first five hours of mower use. Thereafter, maintenance of the spark
plug should take place every 25 hours.
Remove the spark plug cap using a rotary motion and then remove the spark plug with the wrench
provided.
Clean off any carbon deposits using a copper brush and check the electrode gap with a feeler gauge.
Replace and retighten the serviced spark plug and replace the cap.
If the spark plug is worn or damaged, replace with a new spark plug of the same or suitable type for the
engine.
Air Filter
An air filter in poor condition will reduce the performance and life of the engine while making it harder to
start. Regular checks are therefore essential, especially when using the mower in dusty conditions. Check
and clean the air filter every 25 hours of use or more often if the engine is used in a dusty environment.
Remove the air box lid and carefully remove the foam filter cartridge. Clean the cartridge in a small bowl
of warm water containing a few drops of washing up liquid until it is perfectly clean and free from all traces
of grease and dust. Rinse the filter cartridge in clean water and then squeeze gently to remove most of
the water. Let it air dry until it is completely dry.
WARNING: Never clean the foam cartridge in petrol, white spirit or other solvents. These products will
degrade the filter cartridge.
Clean the cover and inside of the air box with a clean lint‐free cloth. Apply a uniform layer of oil to the
outside of the cartridge filter with a brush (you can use clean engine oil for this). Insert the filter cartridge
into its housing and replace the air box lid, ensuring that each component is in place and properly installed.
If the filter cartridge is damaged or is very dirty, replace it using a genuine part.
WARNING: Do not twist the cartridge to clean foam, as you could damage it. This mower is equipped with
a dual filtration system comprising a foam pre‐filter and a cartridge filter paper.
The maintenance of a foam pre ‐ filter is identical to that of a foam cartridge filter, as described above.
The cartridge filter paper should be cleaned with a vacuum cleaner. If it is dirty or contaminated with oil or
petrol, replace it.
Clean the cover and inside of the air box with a clean cloth. Evenly apply a thin layer of oil to the outside
of the cartridge filter with a brush (you can use clean engine oil for this). Replace the filter cartridge in its
housing and then replace the lid of the air box, ensuring that each component is in place and properly
installed.
Adjusting the transmission cable
In its transmission‐engaged position, the mower's advance lever is pushed fully towards the handlebar.
An incorrectly‐adjusted transmission cable can cause premature wear to the mower's drive system.
If the transmission cable is too tight, it will be difficult to move the advance lever towards the handlebars.
Conversely, if the transmission cable is not tight enough, the transmission will function poorly and will lack
power.
To adjust the tension of the cable transmission, increase or reduce the length of the adjustment device
using the key. Check the effectiveness of the transmission and the resistance of the lever.
Once proper adjustment has been reached, secure the adjustment device by tightening the lock nuts.
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