The white box
on the photo (right) is the polyester fundation,
wich is standard part of the engine delivery kit.
The saildrive's leg passes into the water via the
circular opening and a hole in the bottom of your
boat . The banana shaped hole is an opening for
the waterlock in the exhaust pipe. A double
membrane between the saildrive and the fundation
is keeping water out. The Membrane is fixed
firmly to the fundation with a steel ring and 12
must match to the shape of the hull very tightly.
Otherwise the forces will be spread
unproportionally over the surfaces. This will
couse too much stress within some areas of the
laminate wich fixes the fundation to the hull. I
advise to measure the dimensions very carefully.
A perfect way is to make a hardboard dummy of the
fundation where on you can fix a large numeber of
measuring points. I noted the distance between
the top side and the bottom of the boat and took
these over on the fundation itselve, which had
measuring points on exactly the same positions.
A piece of carton is used
for copying of the profiles (above). De contoures
of the hull are already shown by the masking tape
on the fundation (right). After
that the sawing can begin !
is fitted in the boat. On some places you need to
remove material, which can be felt by moving a
thin piece of carton between the hull and the
foundantion (a piece af carton of a pizzabox is
perfect!) It is very easy to scrape of excess
polyester by means of some powered tool. Be
careful however that everything fits exactly !!!!
is fixed ("laminated") to the hull with
glasscloth and polyester- or epoxy resin. When
the resin is cured, the fundation and the boat
are fully assembled into one body . Many years
ago i got a training in the usage of these
chemicals and there is some experience too.
However, a real specialist did the job for me.
Reason : when there is something wrong with the
fundation of a saildrive, i would not like to
sail on that boat for any money in the world ! By
the way : this is also the case with any other
constructional part of a polyester boat !
Before laminating, everything needs
to be grinded very carefully. All topcoat has to
be removed (also from the fundation). For this
job i used a electrical drill and an grinding
disk. Do not inhale dust ! Always use a
professional mask with filter !
The hole in
the bottom is made after the laminating is
let's see if
the saildrive leg fits !
installation of the engine can only start after
installation of the systems for cooling, exhaust, control
and the electrical system. Firtst the fuel
Saildrive.info The Netherlands