Beta Marine Beta 43 Operator's Maintenance Manual page 28

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 power output
Possible Cause
Propeller is too big:
Check gearbox reduction ratio relative to propeller size:
Blocked fuel filter:
Blocked air filter:
Air in fuel system:
Governor spring incorrectly mounted:
Single lever control not operating correctly:
The electrical load is too large on start up:
Problem: Low oil pressure warning light on when underway
Possible Cause
Oil frothing due to high installation angle or too high oil level:
Problem: Low oil pressure warning light on when engine speed is 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:
Problem:
Solution
Reduce the level.
Service injectors.
Get compression checked by your dealer or
Kubota service agent. He 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
Change or depitch.
Change.
Replace.
Replace.
Check system and bleed
Dealer to adjust.
Disconnect speed control cable and move the lever
by hand. Adjust cable.
Disconnect or reduce the load.
Solution
Refer to Beta Marine for advice
Solution
Replace.
Check cooling water flow (see section 2 Cooling).
Remove and clean.
Change.
Check circuit.
Top up and check for leaks.
Panel rev counter not working (when fitted).
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