Beta Marine Beta 14 Installation Manual page 5

ALIGNMENT
To obtain accurate alignment the flexible mountings must
be adjusted until alignment is attained, and the mountings
must be locked in position. The engine / gearbox unit has
to be aligned with the propeller shaft in two ways. The
traditional engine alignment method involves measuring
with either feeler gauges or a DTI (Dial Test Indicator)
ANGULAR ALIGNMENT
Engine / gearbox
flange
PARALLEL ALIGNMENT
Engine / gearbox
flange
The engine mountings and the couplings must now be tightened in position and the alignment re-checked.
mounted on a magnetic foot so that they are aligned
within 0.125mm (0.005"). (Obviously the propeller shaft
must be centered in the stern tube and running true -
through the cutless bearing; if the propeller shaft is not
correctly centered you will experience vibration).
Propeller
shaft
Propeller
shaft
5
Angular Mis-alignment
6 Angular Mis-alignment
Parallel Mis-alignment
7 Parallel Mis-alignment