Beta Marine BV1903 Operator's Maintenance Manual page 15

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:
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:
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.
Replace.
Replace.
Check system.
Dealer to adjust.
Disconnect speed control cable and move the lever by hand.
Adjust cable.
Disconnect or reduce the load.
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