Look Carefully.  That pulley will only go on one way.  The holes are

not

exactly symetrical.  At least this is the case on my 20B and every

13B ever

made.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

Also, the stamped steel pulleys are not always interchangeable on the

keyed hubs. The timing of the pulley bolt pattern is not always the same
with respect to the keyway from hub to hub, and pulley to pulley. Therefore,
the pulley and hub should be considered a matched assembly.

Jon Lauter
Rotary Power Marine Corporation
www.rotarypowermarine.com
516-656-5685

Tracy and Jon are correct of course!  Time to eat (some more) crow.  Checked
again.  The pulley that fits on the 20B E-shaft is a single belt pulley with
only 4 bolt holes, and it fits on "backwards" (i.e. the belt centerline is
over the shaft, not extended out past it).  When assembled correctly, there
are two distinct timing notches on the outer pulley rim, although the paint
used seems to be a dark/dull red.  Kind of hard to see on the black paint.

Tom Kendall

 
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