Beta Marine Beta 30, Operator'S Maintenance Manual

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8
Best practice for efficient & effective ventilation is an air
intake that is located in the engine compartment/room
that is as low as possible, allowing cooler air to enter
below the alternator and drive belts, an air outlet with
an electric extraction fan should be located as high as
possible in the engine compartment/room maximising
ventilation and reducing ambient temperatures. The cooler the engine compartment/room can be
maintained the more efficient the engine will perform.
The required air flow volumes in m
3
/min = 0.05 x engine
power in hp (naturally aspirated) or 0.06 x engine power
in hp turbocharged.
.
Typical ventilation sizes
10hp 20hp 30hp 40hp 50hp 75hp 100hp 150hp
Combustion 14 cm
2
28 cm
2
43 cm
2
57 cm
2
71 cm
2
106 cm
2
142 cm
2
213 cm
2
Ventilation 13 cm
2
25 cm
2
37 cm
2
50 cm
2
62 cm
2
92 cm
2
123 cm
2
185 cm
2
Inlet/Outlet dia. 6 cm 9 cm 11 cm 12 cm 13 cm 16 cm 19 cm 22 cm
To ensure vibration free operation, the engine must be
installed and correctly aligned on substantial engine
bearers, 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 Beta Marine can offer
optional ‘Special Engine Feet’ manufactured to your
dimensions to suit your existing engine bearers and shaft
alignment/installation.
WARNING!
• Do not set the engine feet high up the flexible mount
pillar stud. This will cause excessive engine movement
and vibration. Pack steel shims under the flexible
mount and ensure that the flexible mounting is
securely bolted to the engine bearer.
• The pillar stud on the flexible mount is secured into
position by the lower locknut, do not forget to tighten
this.
NB: Please ensure 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/or knocking
noise. If the flexible mounting is too far offset then the
loading on the flexible mounting will cause premature
failure, modifications are needed. Please refer to
image 6.
ENGINE MOUNTING
{
5 Engine Mount