Westerbeke ATOMIC 4 User Manual

any ribs which might interfere. The
wedge is then screwed into position
over the locat ion of the shaft hole.
Use a good grade bedding compound
between the wedge and the keel and
fasten securely to the keel with
scre'ws, being careful to place these
scre'~Ts 'where they will not interfere
with the shaft log mounting screws.
--:::::- - - - - I<£EL
Fig.4 Method of Drilling Shaft Hole
After the wedge is in place, pre-
pare for the drilling of the shaft
hole. Preparation for this step
consists of the construction of two
hardwood blocks which will act as
guides in getting the shaft hole
started properly and keeping the
angle of drilling fairly accurate.
These blocks should be of straight-
grained hardwood maple or oak
wi 11 do. They should be approximately
2" thick, 5" wide and 10" long.
One of these blocks (See Fig. 4
and 5) is fastened to the inside
of the boat so that the center of
the block lines up approximately
with the position of the shaft
hole and th9 other is fastened to
the bottom of the boat at the ap-
proximate position the hole will
emerge. The face of the block fas-
tened to the inside of the boat is
cut so as to be at right angles to
the drilling angle. In order to
keep the drilling angle accurate,
a guide block can be fastened 3"
to 6" from this starting block. A
notch cut in this block to fit the
shank of the drill will support the
drill at the proper angle. (See
Fig ~ 5)
-6-
A drill 1/8 inch larger than the
shaft diameter should be used to
provide PI' opel' c-learance. Any type
of drill may be used which will
drill a clean hole and has a shank
long enough to pass through the two
blocks and the keel. A standard car-
penter's auger is not recommended
since the "wore" tends to follow
the grain end using it may result in
a wandering hole. If a drill cannot
be found with a sufficiently long
shank,it can be extended by welding
on a stee 1 I' ad. ~;ll.en the dr i 11 has
passed completely through the keel
and the bottom block, it can be re-
moved and the two temporary drilling
blocks unscrewed from the boat.
Now lay the shaft log on the wedge
and over the shaft hole. In some
cases, it will be necessary to chisel
out the wedge to conform to the bot-
tom of the shaft log. Make this
notch slight ly larger than necessary
to allow for later alignment.Fashion
a gasket from 1/16" rubber or 1/32"
gasket mat er ial and place it between
the shaft log and wedge.
Fig.5 Photo of Drilling Operation
Insert the propeller shaft in the
shaft hole and uith the shaft log
over the hole, position the shaft
log so that the propeller shaft is
approximately in the center of the
halo in the shaft log. Coat both
sides of the shaft log gasket with
a good marine sealer and fasten the
shaft log in place with screws long
enough to pass through the 'wedge
and well into the keel.
Next slip the shaft strut over the

Westerbeke ATOMIC 4 Specifications

General

Brand	Westerbeke
Model	ATOMIC 4
Category	Engine
Language	English