Engine Mounting - Beta Marine Beta 43 Operator's Maintenance Manual

Section 1
Installation Recommendations
The installation details are basic guidelines to assist installation, however due to the great diversity of marine craft it is
impossible to give definitive instructions. Therefore Beta Marine can accept no responsibility for any damage or injury incurred
during the installation of a Beta Marine Engine whilst following these guidelines.
• All engines shall be placed within an enclosure separated
from living quarters and installed so as to minimise the
risk of fires or spread of fires as well as hazards from toxic
fumes, heat, noise or vibrations in the living quarters.
• Unless the engine is protected by a cover or its own
enclosure, exposed moving or hot parts of the engine that
could cause personal injury shall be effectively shielded.
• Engine parts and accessories that require frequent
inspection and / or servicing must be readily accessible.
• The insulating materials inside engine spaces shall be
non-combustible.
• Adequate ventilation must be included with every engine
installation. It is very important that the engine

Engine Mounting

To ensure vibration free operation, the engine must be
installed and correctly aligned on substantial beds, extending
as far forward and aft as possible, well braced and securely
fastened to form an integral part of the hull.
The engine must be installed as low as possible on the
flexible mount pillar stud. This will limit vibration and extend
the life of the flexible mount. To assist with engine
replacement we offer 'Special Engine Feet' manufactured to
your dimensions, as an optional extra to suit your existing
engine bearers and shaft alignment/installation.
Warning
(1) Do not set the engine feet high up the flexible mount
pillar stud. This will cause excessive engine movement
and vibration. Pack under the flexible mount with steel
shims securely bolted into the engine bearer.
Flexible Output Couplings
A flexible coupling should be mounted on the gearbox output
flange and is strongly recommended in almost every case.
compartment is ventilated, as the engine will produce
radiated heat - approximately equal to
output power. Also the 65 and/or 100 amp battery
charging alternator/s create lots of heat. In yachts we
recommend forced ventilation using an extraction fan to
draw out the hot air and limit the maximum engine
compartment /room temperature to 60°C. This can be
checked with a thermometer on a hot day - the cooler the
engine compartment the better. A symptom of overheating
problems is black belt dust. It is normally best with two
ventilation holes; an inlet of at least 300 cm
colder air to enter near to the alternator and drive belts
and a second outlet (a third bigger than the inlet) for the
hot air to rise and ventilate out from the top of the engine
compartment using the cooling fan.
3
(2) The pillar stud on the flexible mount is secured into
position by the lower locknut, do not forget to tighten
this. Also ensure that the stud is not screwed too far
through the mounting body so that it can touch the
bearer. This will cause vibration and knocking noises
which are very hard to find!
Flexible couplings do not accommodate bad alignment, they
are designed to absorb torsional vibrations from the propeller
(transmitted along the propeller shaft).
5
1
/ of the engine
3
2 allowing