Propeller Installation on ShortWingPipers

Remove #1 spark plug. Rotate crankshaft till pressure begins to build 
(place thumb in spark plug hole to feel/hear pressure building).  
You are coming up on TDC for #1 cylinder.  Continue rotating crankshaft 
until #1 piston is TDC (use timing mark on back of ring gear aligned 
with crankcase split or use markings on front of ring gear aligned 
with punched hole in starter housing).

With #1 cylinder on TDC, the prop should be installed such that it is 
Horizontal, ie level to the ground.

There should be a small "no 1" stamped near the hub on one prop blade. 
That blade goes "over"/"toward" the No. 1 cylinder. It is permissible 
to install the prop "180° out", but only as a "fix" for a SLIGHT vibration 
at cruise. Nine times out of ten, it will NOT be an issue. Torque prop 
correctly (visit Sensenich's website for detailed instructions or see pdf 
file on this site) and safetie prop bolts, reinstall spinner and spark plug. 
Button up airplane. Your prop will now be in the PROPER position not only 
for handpropping, but more importantly will also be "timed" to best act as 
a "flywheel" with the crankshaft.
 
Don't forget that this is not Preventative Maintenance, and requires 
a Logbook entry by an appropriately rated Mechanic.