Beta Marine Beta 28 Operator's Maintenance Manual page 48

Problem: Engine overheats - Keel cooling only
Sometimes overheating is caused by:
(a) Not fully venting the engine cooling system of air. It is necessary to remove all air from the cooling system -
including the "skin" tanks and (if fitted) the Calorifier and associated piping.
(b) Incorrectly sized "skin" tanks that have been sized for 'usual' canal use (rather than maximum engine output
that can sometimes be required) on fast flowing rivers. An additional "skin" tank may need to be fitted; please
refer to our website: Inland waterways - Guidelines: keel cooling tank sizes.
Problem: Battery quickly discharges
Possible Cause
High load and insufficient running:
Low electrolyte level:
Fan belt slipping - black dust in engine compartment,
engine compartment temperature too high:
Alternator defective:
Battery defective:
Poor wiring connection:
Problem: Morse control cable will not fit
Possible Cause
Incorrect fitting:
Problem: Panel rev counter not working (when fitted)
Possible Cause
No W connection to alternator:
Wiring fault:
Problem: Transmission noise
Possible Cause
Check gearbox oil level:
"Singing" propeller:
Drive plate rattle at tickover:
Worn drive plate:
Propeller shaft hitting the Gearbox half coupling:
Propeller torsionals causing gears to rattle at low rpm:
Solution
Reduce load or increase charging time. Large
domestic battery banks subject to high electrical
loads will take a considerable time to recharge from
a single alternator.
Top up.
Adjust tension / replace belt with a high temperature
type and / or improve engine compartment ventilation.
Check with Agent.
Replace.
Check wiring system.
Solution
Cables are being fitted the wrong way around,
switch over and fit the opposite way.
Solution
Check output from 'W' connection.
Should be about 9V AC
Check circuit
Solution
Top up.
Check with propeller supplier about 'harmonics'.
Check engine rpm (must be 850rpm min. in gear).
Change.
Move shaft back to give 5mm - 10mm clearance
(Type 12/16 couplings only).
Fit a torsional flexible coupling such as Centa
type 16 or equivalent.
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