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Performance Catamarans Prindle 19 - Rudder Blades and Helm Adjustment

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Tiller extension should be able to touch tram-
poline easily. If it does not, the tiller crossbar
has been installed backwards.
RUDDER BLADES
To install rudder blades into rudder castings,
untie ends of downhaul and uphaul lines in
castings, but do not unlace. Remove 1/4" bolt
with lock nut. Place rudder blade between
casting with lock pin forward. Reinstate 1/4"
bolt through casting and 1/4" hole in rudder
blade. Replace lock nut and tighten until rud-
der will just fall by itself. Do not over-tighten
as this will restrict rudder movement, too
loose and rudder will be sloppy in casting.
Thread downhaul and uphaul lines into rudder
blade and tie off ends with a figure eight knot.
Make sure the ends do not extend beyond the
edge of blade. Follow same procedure on both
blades.
RUDDER LOCK BOLT
The rudder lock bolt is on the forward edge of
each rudder blade. It is necessary to adjust
this bolt to obtain proper helm. Making the
bolt longer produces more weather helm
( h e avy steering) and shortening the bolt
decreases weather helm (easier steering).
ADJUSTING HELM
We recommend the following method for
adjusting the rudders before the boat is
sailed.
Place boat so there is clearance to lower rud-
ders and lock down. Take a short batten or
yardstick and lay the straight edge flush
against the transom. Adjust the lock bolt so
that the forward button edge of the rudder is
about 1/4" to 3/8" forward of the forward
edge of the batten. (Pull rudder back lightly to
pull out any slop). 1/4" to 3/8" forward is a
good starting point, further adjustment may
be necessary for personal preference.
Note: As the mast is raked aft, the rudders
must be raked forward to balance helm.
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