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When everything is looking good, drill a
3/32 hole through the brass boom tube
sleeve and the boom tube. Put the supplied
2-56 screw and locknut in place. Do this for
all 4 corners.
Center the sponsons in the tub.
Use boom tube clamps against the tub to
keep the tubes in place.
Mount your engine back into the engine
rails.
Trim the shaft tube so that it is about ½ inch
longer than the ski bottom if using a
conventional strut.
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
