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Trim the shaft tube so that it is about ½
inch longer than the ski bottom.
Bolt the strut to the transom. You may
have to trim the shaft tube to fit inside
the strut.
The strut needs to be at the very bottom
of the ski for the proper propeller depth.
Slide your drive dog onto your flex shaft,
then your prop. Leave about half of the
threads showing past the prop.
Tighten the drive dog set screw.
Remove the prop and measure the
exact location of the set screw from the
end of the shaft. Remove the drive dog
and file or grind a flat spot on the shaft
about 1/8 inch wide. Put the drive dog
back on the shaft, aligning the set screw
in the flat you made.
Push the flex shaft into the shaft tube,
and into the collet. Make sure that the
shaft goes all the way into the collet.
Measure the distance from the back of
the strut to the front of the drive dog.
Subtract 3/16.
Cut this amount off of the flex shaft. This
allows you to put the shaft all the way
into the collet, and still have a 3/16 gap
between the strut and drive dog. This is
needed because the flex shaft will twist
slightly at high speeds, and actually get
shorter.