HEINKEL Tourist, Owner'S Manual

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Micronic air filter
The micronic air filter needs no servicing. It keeps any dust out of the engine. The life of the paper
filter insert therefore depends on the amount of dirt handled. In town and on tarred roads, it should
last some 5000 miles. On very dusty, country roads, a drop in the engine power might well be
observed, though, after a substantially shorter distance.
Renew filter inserts every 5000 miles (see Fig.7), or correspondingly sooner if the filter gets dirty.
Caution:
Do not let filter inserts come in contact with liquid.
'
Micronic air Filter
1. Filter housing
2. Cover plate
3. Micronic filter