Beta Marine BV1305 Operation And Maintenance Manual page 17

PROBLEM: ERRATIC RUNNING
Possible Cause
Air in fuel supply:
Fuel lift pump faulty:
Clogged fuel filter:
Fuel return not fed back to the fuel
tank, or blocked pipe:
Air filter blocked:
Worn or blocked injector:
Engine rpm in gear is too low, this
must be 850 min:
Faulty stop solenoid:
Broken fuel injection pump spring:
PROBLEM: WHITE OR BLUE EXHAUST GAS
Possible Cause
Engine oil level too high:
Blocked injector:
Piston ring and bore worn, 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:
Solution
Check supply system for leaks and fix.
Replace.
Replace.
Re-route pipe or clean.
Replace.
Service injectors.
Increase engine tick over speed.
Disconnect wiring to solenoid. If running improves check for a wiring fault.
Replace.
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.