Beta Marine Beta 50 Operator's Maintenance Manual page 42

Problem: Hunting at idle
Possible Cause
Idle adjustment screw may need adjusting:
Problem: Hunting at higher speeds
Possible Cause
Fuel supply problem:
Problem: White or blue exhaust gas
Possible Cause
Engine oil level too high:
Blocked injector:
Piston ring and bore worn or con rod bent due to water
ingression, giving a low compression:
Check that the breather pipe is clear and not obstructed:
Problem: Black exhaust gas
Possible Cause
Blocked air filter element:
Over pitched propeller - engine will not reach its full rpm:
Accumulated debris on hull:
Problem: Low oil pressure warning light on when underway
Possible Cause
Oil frothing due to high installation angle or high oil level:
Problem: Low oil pressure warning light when engine speed reduced to tick over
Possible Cause
Faulty switch sender:
Engine running too hot:
Oil relief valve stuck partially open with dirt:
Blocked oil filter:
Wiring fault:
Insufficient oil:
Solution
Always contact Beta Marine for advice
with idle adjustment.
Solution
Change fuel filter and check fuel supply
Solution
Reduce the level.
Service injectors.
Get the compression checked by your dealer or
service agent. They will advise action to be taken.
Remove and clean out.
Solution
Inspect and replace.
Get the propeller re-pitched if necessary.
Inspect and clean if required.
Solution
Always contact Beta Marine for advice.
Solution
Replace.
Check cooling water flow (please refer to 'Cooling').
Remove and clean.
Change.
Check circuit.
Top up and check for leaks.
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