29
INSTALLATION AND PREDELIVERY
TRANSOM MEASURING AND DRILLING
2
TRANSOM MEASURING
AND DRILLING
Hull Centerline
Locate the centerline of the boat transom as it
relates to the hull (bottom) of the boat.
Use a straightedge to draw a line connecting the
port and starboard chines. The chines should be
used as reference points for determining the cen-
terline of the hull.
Use a framing square to accurately place a line on
the transom. The centerline of the hull should be
in line with the keel of the hull and perpendicular
to the midpoint of the line connecting the port and
starboard chines.
Transom Heights
Make sure the transom height is consistent with
the height of the outboard to be installed.
•
A 19 to 21 in. (48.3 to 53.3 cm) transom height
uses a 20 in. (50.8 cm) shaft outboard.
•
The shaft length of the outboard being installed
should come close to matching the transom
height of the boat.
Determine transom height by measuring from the
top edge of the transom, along the centerline.
Use a straightedge as a reference to extend the
bottom of the boat.
Position the straightedge along centerline. The
distance from the top edge of the straightedge to
the top edge of the transom is the actual transom
height.
1.
Chine
2.
Strake
3.
Keel
4.
Hull centerline
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2
3
4
1.
Top edge of transom
2.
Actual transom height
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