Beta Marine BV1903 Operator's Maintenance Manual page 18

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: 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:
Problem: Vibration
Possible Cause
Poor alignment to shaft:
Flexible mounts not adjusted
correctly to take even weight:
Flexible mount rubber perished: Replace. (Diesel or oil will eventually perish most rubbers.)
Loose securing nut on flexible
mount:
Insufficient clearance between There must be at least 10% tip clearance between propeller and
the propeller tip and the bottom bottom of the boat (ie 10% of the propeller diameter as
of the boat:
Loose zinc anode on the shaft: Tighten or replace.
Worn cutless bearing or shaft:
Weak engine support/bearers: Check for cracked or broken feet.
Problem: Morse control cable will not fit
Possible Cause
Fitting incorrectly
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
Top up.
Check with supplier.
Check engine rpm (must be 850 rpm minimum in gear).
Change.
Move shaft back to give at least 5mm clearance (Type 12/16
couplings only)
Solution
The alignment must be accurate even if a flexible coupling is
used (see section 3 ALIGNMENT).
Check relative compression of each mount.
Check alignment and then tighten the nuts.
clearance). Refer to boatbuilder.
Replace.
Solution
Cables are being fitted the wrong way around, switch over and fit
the opposite way.
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