Compact Radial Engines MZ201 Instruction And Maintenance Manual page 14

ALIGNING THE PULLEYS
When replacing one of the two pulleys in order to change the reduction ratio and adapt it to the propeller
diameter, always check that the two pulleys are perfectly aligned. A misalignment of over 0.5 mm, could
shorten the life-span of the belt. If the secondary pulley is misaligned, adjust by tightening or loosening the
supporting shaft. The eccentric shaft has a left hand screw thread, thus the propeller axis should be rotated
clock-wise; insert a 12 mm Allen wrench in the hexagonal cavity in front of the driven pulley axis to move
the pulley outwards.
The screw thread has a lead of 1.25 mm; this means it will advance by 1.25 mm at each turn of the wrench.
In the event of any difficulties, contact your distributor.
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