RDG603A31- Issue 4
Page 21 of 88
SECTION 5
– Installation
NOTICE:
REFER TO THE SHIRE MANUAL PRIOR TO INSTALLING THE ENGINE.
1. Ventilation
All internal combustion engines radiate heat and require cool, clean air to aid complete
combustion.
Please Ensure that adequate engine room ventilation is provided, by fitting at least two
vents of an aperture of not less than 15,000mm
2
each (24in
2
).
An allowance must be made for any grills, louvres or bends placed in the
airflows and generally an increase of 25% in area is sufficient to overcome any
restriction problems.
2. Engine Beds
These should be a minimum of 10mm thick, extended rearward and be welded to the
hull and forward to the bulkhead. Webs or gussets must be welded in place midway
to prevent flexing.
3. Cooling System
Ensure pipe work to and from the skin tanks is of sufficient bore. Ensure tight bends
and elbows are avoided or kept to a minimum (sizes are listed overleaf).
4. Skin Tanks
The ideal skin tank internal thickness is between 50 and 75mm, the table below will indicate
a suitable tank size. However, volume will not compensate for lack of surface area. It should
be recognised that fitting a large calorifier will increase the theoretical cooling capacity only
until it is up to temperature. It is unlikely that a boat on the inland waterways will operate at
full power for long periods of time. The engine cooling water outlets are on the right hand
(starboard) side of the engine. The outside of the skin tank must be completely below the
waterline all of the time for effective cooling.
