Beta Marine Beta 43 Operator's Maintenance Manual page 27

Problem: Erratic running / hunting
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:
Fuel suction head is too much:
Problem: Hunting at idle
Possible Cause
Knurled leak-off valve may be closed, or
idle adjustment screw may need adjusting:
Problem: Hunting at higher speeds
Possible Cause
Fuel supply problem:
Problem: Water in lubricating oil - general
Possible Cause
Core plug pushed out due to frozen block:
Water pump seal damaged:
Problem: Water in lubricating oil - heat exchanger cooled
Possible Cause
Oil goes "milky" due to seawater entering exhaust manifold:
Problem: Water in lubricating oil - keel cooled
Possible Cause
Oil goes "milky" due to water entering exhaust
manifold and then into the sump:
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, this is usually caused by water in the
engine oil/fuel
Fit electric fuel lift pump.
Solution
Open knurled leak-off valve fully, with idle adjustment -
speak to Beta Marine for advice - discuss problem.
Solution
Change fuel filters and check fuel supply.
Solution
Service Agent to check and replace.
Service Agent to check and replace.
Solution
Check installation - has anti-siphon valve been fitted?
Change engine oil and run engine for 10 minutes each
time to eliminate any water. Get fuel injection pump and
compression checked by Service Agent.
Solution
Check installation - has dry exhaust system been fitted
correctly, and ensuring rain water cannot enter the
exhaust port and run back? (See Dry Exhaust System).
Change engine oil and run engine for 10 minutes each
time to eliminate any water. Get injection pump checked
by Service Agent.
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