User manual

TEC 29 22
user’s manual
GB
3 Troubleshooting, maintenance, recycling
Spark plug maintenance
Warning
The spark plug must be properly tightened. A loose spark plug can
become very hot and damage the engine.
Important
When fitting a new spark plug, tighten it by half a turn after it has
started compressing the washer. If you are fitting a used spark plug,
tighten it by between 1/8 to 1/4 of a turn after the same has started to
compress the washer.
Never use a spark plug with a different heat rating:
1. Remove the cap of the spark plug and remove it using a wrench.
2. Check the spark plug by eye. Replace the spark plug if it is worn
or the insulation is broken or chipped. If the spark plug is just
dirty, clean it with a wire brush and if is still in a good condition,
use it again.
3. Measure the distance between the electrodes with a feeler gauge.
This distance must be 0.7-0.8 mm. If necessary adjust this
distance by bending the electrode.
4. Check that the washer of the spark plug is in a good condition, if
this is the case screw the spark plug in by hand, to avoid stripping
the thread.
5. Once you have screwed the spark plug in by hand, tighten it with
a plug wrench to compress the washer.
0.7 - 0.8 mm