Boat Construction; Transom Thickness And Surface - Mercury Alpha Installation Manual

GASOLINE STERNDRIVE INSTALLATION MANUAL

Boat Construction

Transom Thickness and Surface

IMPORTANT: Transom thickness and surface plane (flatness) must be controlled
where the sterndrive unit mounts.
Thickness
Parallelism
Flatness
Angle
a
a -
b -
c -
d -
e -
b
a -
b -
c -
Page 10 of 137
Transom Specifications
Between 2 - 2-1/4 in. (51 - 57 mm) for 8 in. (203 mm) to either
side of the vertical centerline
Inner and outer surfaces must be parallel within 1/8 in. (3 mm)
Transom surfaces in area where transom assembly will be
mounted (includes vertical as well as horizontal dimensions):
Inner Surface – Flat within1/8 in. (3 mm)
Outer Surface – Flat within1/16 in. (2 mm)
10 -16 Degrees
e
b
c
Transom Thickness
Inner Surface
Outer Surface
Transom Plate Coverage
Transom Angle
a
Measuring Thickness
Measuring Flatness
Suitable Mandrel To Check For Uniform Transom Thickness
22170
c
70004
d d
72700
75479
90-860172011
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