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shaft and
move it
along the
pro-
peller shaft with
the base pressed
firmly against
the keel
until the
shaft is approximately in the center
of the bear ing hole. Screw the strut
to the keel at this point but do not
tighten
down.
Using small
wooden
wedges, center the
propeller shaft
in the
shaft hole.
Make final ad-
justment of the
strut and
tighten
its hold-down
screws and angle ad-
justing nuts securely.
3.
INSTALLING ENGINE STRINGERS AND
BEDS
Engine stringers
should now be in-
stalled (See Fig.6).
These
longi-
tudinal members should run at least
two-thirds the
length of the hull,
and to them the
engine bed will be
fastened.
In most
modern
hulls,
these
members will be
included in
the hull plans and usually
will be
placed to take an
engine with
22~"
mount ing centers. If these str ingers
Fig.6 Photo of Engine Stringers
are not
in place,
they
should be
constructed of 8"
by
2"
oak
or
maple and should run from the tran-
som to at least
three feet forward
of the
engine
location.
The dis-
tance between them should
be
the
distance
between mounting
centers
of the
engine plus
one
thickness
of the material
to be used for en-
-7-
gine beds.
They should rest firmly
on the hull ribs and be cross-braced
at intervals by notching into 2" by
8-" members .Lunning at right
angles
to them.
:~d
braces and
stringers
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Fig.7
Engine Bed vonstruction
should
be
drift-bolted
together.
These cross-braces should
conform
to the shape of the hull and
those
that will be
under the engine must
be cut
to fit
the contour
of the
underside of the engine.
The next step
is the
construction
of
the
engine bed.
(See Fig. 7).
These are pieces
of 2" hardwood 8
n
to 10"
longer than
the length
of
the engine.
The width of the mate-
rial needed will depend on the angle
at which the engine is to be mounted,
the depth of the
engine below the
shaft line,
and the type of engine
hanger - that is,
whether the han-
gers are parallel to the shaft line
or offset in height.
The height of
these engine beds
is easily deter-
mined
by
removing
the
propeller
shaft
and
stretching
a
string
through
the strut,
shaft hole and
stuffing box and
fastening it to a
piece of
stock tacked
temporarily
in place
somewhat
forward of
the
engine location.
A piece of engine bed
material
is
then placed
on edge
alongside the
string
in the
position
~here
the
engine is to be mounted. It is then
a simple matter
to
measure
down
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