ENG - 30
03917401.ENG rev. 0
(13)
Check condition of sea water pump impeller and its eventual
replacement:
Driving impeller is neoprene and cannot rotate dried. If operated
without water, the impeller can be broken. It is important therefore
that a spare impeller is always available.
To change the impeller, close water inlet cock, remove pump
cover and with two screwdrivers prize it by removing the impeller
from the shaft. Clean housing and replace with a new one. Fit
cover by placing a new seal. Open bottom cock. If the impeller is
broken, when it is changed, be sure all the rubber residues
scattered are removed from the water pipes.
Fig. 7.2.13
(14)
Check alternator and starting motor:
The engine has an alternator of 12V and 70 or 110 Amps, according to the model, with an electric regulator incorporated
and an output for the revolutions counter.
Regularly check the electrical connections, its relevant positioning and the good terminal contact. For the starting motor,
check brush wear and switch sour face roughness. Replace if the service limitation has been reached.
(15)
Cleaning the fuel tank:
Drain out the contains of the fuel tank to remove condensate and any foreign materials. Wash the tank with fuel (dispose
of fuel as described in heading 4.4.
(16)
Replace alternator belt:
Fully detension old belt so that its removal can be made easily.
When the belt is unfitted, check the condition of the pulley
recesses, they shall be dry and clean. Its cleanliness is
performed with soap water (never use petrol, gas oil or similar
products).
Fit the belt taking care the belt insertion is made with the hand
but without damaging it and if required pace it with a tool at least
without any cutting edges since otherwise the belt could be
damaged and its life shortened. The belt shall be tensioned such
as is previously explained.
Fig. 7.2.16
(17)
Check the compression pressure of each cylinder:
Check each cylinder with the glow plug removed using a
compression pressure gauge. If measurement of any cylinder is
below
27 kg/cm
2
(384psi) at 300 rpm
, the cylinder must be
repaired.
Fig. 7.2.16
