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INSTALLATION RECOMMENDATIONS
The installation details contained herewith are basic guidelines to assist installation, due to 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 not combustible.
ENGINE MOUNTING
To ensure vibration free operation, the engine must be installed on substantial
beds, extending as far forward and aft as possible and well braced 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. If necessary, fit
spacer blocks below the mounts.
A flexible coupling should be fitted. Flexible couplings do not accommodate bad
alignment. The mating faces of the gearbox and tailshaft must be checked for
alignment, they must be parallel and concentric to within 0.005" (0.127mm).
ALIGNMENT
Alignment must be checked for parallel (A) and concentric (B) misalignment using
a set of feeler gauges.
To obtain accurate alignment the flexible mountings must be adjusted until
alignment is attained, and the mountings must be locked in position.
Once mounts are tightened, alignment must be re-checked. Coupling can now be
fitted in accordance with instructions supplied with coupling.
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.
(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 mounting bearer. This will cause vibration and knocking noises which are very
hard to find!
Exhausts
(a)
A correctly installed engine as described in this handbook will meet the exhaust emission requirements of
Directive 2003/44/EC amending the Recreational Craft Directive 94/25/EC.
(b)
For compliance with exhaust emissions requirements, engines must have correctly installed exhaust
systems. To ensure exhaust emissions are kept within permissible limits it is most important to reduce
exhaust back pressure to a minimum, whilst ensuring exhaust is adequately muffled. Back pressure
increases as exhaust length increases and from bends in the exhaust system. The exhaust back pressure,
measured with the exhaust system connected and the engine running at full speed, must not exceed
80mmHg (3.1inchesHg / 42 inches WG). The correct measuring point is at the position where the exhaust
connects to the exhaust manifold. That is before the water injection elbow or dry exhaust bellows.
Wet Exhaust hose should be matched to the following injection bend sizes.
Standard
High rise water injection bend SS
SECTION 3
BV1903
50mm
50mm
23
BV2203
50mm
50mm
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