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11
TENSION OF THE REDUCTION BELT DRIVE - USE CAUTION
Attention: a belt which is “over tensioned” can do permanent damage to the
bearings inside of the pulley hubs and drive shaft.
Therefore we strongly suggest for you to follow carefully these instructions.
Correct belt tensionin is from 380 to 400 Hz.
Before adjusting the belt take a felt pen or marker and make a small sign on the cam shaft and on
the front of the reduction plate.
This is your Zero or start point and from here you will be able to clearly see how much you move
the eccentric tensioning cam in relation to the reduction plate.
Remember “these are Fine adjustments” and we suggest not to rotate the cam any more than 1
mm per adjustment. After each adjustment you can try to start the engine and check the result.
If the engine does not start well then it usually means the belt is still too loose and is slipping - in
this case repeat the operation by tensioning the belt another 1 mm.
Consider that if the belt slips a little, but the engine still starts fine, then the tension is correct.
Belt tension always increases automatically when the engine is running because of thermal
expansion in the pulleys.
Once you have found the correct tension , do not adjust it any more. In case of doubts please
contact your paramotor dealer – or CORS-AIR.
To adjust the belt do the following:
• Loosen the safety bolt located high up behind the reduction mounting plate and the side bolt.
Once these are loosened the you can turn the cam with a n.27 mm size wrench - careful to
observe the 1 mm increments.
• Once you have finished turning the cam remember to re-tighten the safety bolts, first the back
bolt, by keeping firm the cam with the wrench, and then the side bolt.
IGNITION (ONLY FOR ENGINE WITH HAND START)
In case the coil and/or the handwheel must be changed, it is compulsory to turn to your dealer or
to trained personnel, even if this operation can appear simple at the first sight, since the timing
of the engine, if wrong, can change the performance and cause damage to the engine. To check
the timing: the distance between the coil and the flywheel magnet is 0,3/0,5 mm.
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