Westerbeke ATOMIC 4 User Manual

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Fig.2 :Method of Locating Sbaft Hole
engine must be lined up eitber by
raising or lowering it or changing
the angle. Do not move the engine
fore-or-aft from its previously
determined location.
If full scale drawings of the boat
are not available, another simple
method of locating this spot is to
lay a length of 1 x 4 lumber from
the center of the transom forward to a
spot well beyond the determined en-
gine 10cation.(See Fig.2). Tempora-
r i
ly prop this str ip (A) in place so
it is roughly parallel to the keel.
To this,and at a right angle to it,
nail another strip (B) at the point
where the flywheel of the engine
will be located. Fasten a second
strip (C) so that it passes outside
the stern, follows the angle of the
stern and projects at least three
feet below the bottom of the boat.
Narrow strips are nou fastened to
the top strip, approximately every
foot along its length and at right
angles to it, so that the ends of
the sticks just touch the bottom of
the boat. This jig, which actually
is a full sized pattern of the in-
s ide of the boat, can now be removed
and laid flat on the floor.
A string is then stretched from the
board which represents the transom
to the one represent ing the locat ion
of the fl~1heel. The string is ad-
-5-
justed to obtain proper propeller
clearances and crankcase and fly-
wheel clearance for the engine. When
the position of the string has been
accurately determined, the place it
passes each of the sticks is care-
fully marked and the jig placed back
in the boat. It is then a simple
matter to lay a straightedge along
these marks (1,2,3 on Fig.2) to the
bottom of the boat which will give
the position and angle of the shaft
hole.
2. INSTALLING THE PROPELLER SHAFT
A wedge is now constructed which
will fit between the keel and the
inboard shaft log. This wedge may
be fashioned from any hardwood, but
mabogany is recommended since it is
Fig. 3 Shaft Log
easy to work with and is an excel-
lent marine material. This wedge
should be as wide and as long as the
shaft log to be used and cut at an
angle corresponding with the angle
of the shaft hole minus the angle
of the shaft log. (See Fig.3) The
thickness of the wedge will vary
with the angle but the thin edge
should be approximately 1/2 inch
thick. In some cases, the width of
wedge may exceed the width of the
keel since it must be as wide as the
shaft log.
In this event, the underside of the
wedge should be shaped to fit the
keel and tbeedges shaped to fit
alongside the keel and fit the hull
as snugly as possible. The wedge
should also be notched out to fit

Westerbeke ATOMIC 4 Specifications

General

Brand	Westerbeke
Model	ATOMIC 4
Category	Engine
Language	English