Engine Alignment - Drives, Flanges, Flexible Couplings - Beta Marine Beta 43 Operator's Maintenance Manual

Engine Installation at an Angle
Beta Marine propulsion engines can be installed at angles up
to a maximum of 15° flywheel up or flywheel down when
static, or can be run at up to 25° when heeling. When our
engines are installed at varying angles of inclination the
normal markings on the dipstick should be disregarded.
Alignment
To obtain accurate alignment the flexible mountings must be
adjusted until alignment is attained, and the mountings must
be locked in position.
Angular Alignment
Engine / gearbox
flange
4 Angular Mis-alignment
Parallel Alignment
Engine / gearbox
flange
5 Parallel Mis-alignment
The engine mountings and the couplings must now be tightened in position and the alignment re-checked.
It is probably better to totally drain the lubricating oil from the
sump, replacing the oil filter with a new one; then add the
recommended amount of lubricating oil – noting its position
on the dipstick – and then marking the dipstick. If in doubt
ask Beta Marine.
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) mounted on a magnetic foot so that they are
aligned within 0.125mm (0.005").
Propeller
shaft
Propeller
shaft
6
Angular Mis-alignment
Parallel Mis-alignment