Beta Marine BD722 - Troubleshooting: Warnings and Overheating; Low Oil Pressure Warning and Tacho Issues; Engine Overheating Causes and Solutions

18
PROBLEM: LOW OIL PRESSURE WARNING LIGHT comes on when engine speed reduced to tick over:
Faulty switch sender:
Engine running too hot:
Oil relief valve stuck partially open
with dirt:
Blocked oil filter:
Wiring fault:
Insufficient oil:
Replace.
Check cooling water flow (see section 2 Cooling).
Remove and clean.
Change.
Check circuit.
Top up and check for leaks.
Possible Cause Solution
PROBLEM: ENGINE OVERHEATS
Check coolant level:
Insufficient sea water flow:
Damaged or worn pump impeller
:
Blocked tube stack in heat
exchanger:
Zinc anode flakes blocking tube stack:
Pressure cap loose:
Switch sender faulty
:
Inlet sea cock is too small:
High exhaust back pressure:
Air locks in cooling pipe work to keel
cooler:
Keel cooler of insufficient size:
Possible Cause Solution
No W connection to alternator.
Wiring fault:
Check power output from ‘W’ connection. Should be about 9V AC.
Check circuit.
Possible Cause Solution
PROBLEM: PANEL REV COUNTER NOT WORKING (WHEN FITTED
Top up.
Clear blocked intake or filter.
R
eplace.
Remove tube stack and clean - replace ‘O’ rings.
Remove and clean tube stack as above.
Replace.
R
eplace.
Replace (see heat exchanger cooled seawater inlet system in section 3).
Must not exceed 3.1” of Hg.
Vent the system and top up coolant.
Contact boat builder
.