Engine Troubleshooting - Westerbeke 6.5 MCG Service Manual

ENGINE TROUBLESHOOTING
Problem Possible CaiiSe
No DC charge to starting battery. 1.Circuit fuse faulty/blown (two fuses).
2.Faulty circuit connection.
3.Faulty regulator/battery charger.
4.Bridge rectifier.
5.Charge AC winding.
High DC Charge to batterY.
· 1.Battery chargltt misad]usted.
2.Faulty starter solenoid.
Starter stays energiZed after
sfilit:
1.
Faulty K1 relay.
2.Faulty starter solenoid.
Poor performance at generator speed. 1.Low octane fuel.
2.1ncorrect ignition timing.
3.Fuel supply issue.
4.High engine compartmenttemperature (122" F max}.
Black exhaust smoke.
1. Dirty air screen.
2.Faulty injector.
Blue exhaust smoke.
1.Lube oil is diluted.
2.Crankcase breather tube is clogged.
3.High lube oil level.
White exhaust smoke. (Check engine fault)
1.Faulty oxygen sensor ..
2.Poor connection at sensor.
Check engine LED's are illuminated.
1.Diagnostic software required.
2. . .
( 0 Sensor
I Low Battery )
Speed LED's are illuminated-no flashing.
1. Throttle shaft sticking.
2.lntake manifold vacuum leak.
Pair of Speed LED's are illuminated"flashing.
1
~AC
generator overload.
2.Fuel starvation.
External alarnt LED is illuminated.
1.Loose connection.
2.Faulty fire suppression shutdown devise.
3.1ncorrect setting on shutdown device (contacts should n/c)
Engine runs for 15 +I· seconds, then shuts
1. Oil Pressure Switch (#037323)
down. The SPEED LED illuminates AFfER
2.
T~Relay
(053555)
the engine shuts down.
----··
,
..
Engine
starts,
runs for 20-30 seconds then
1.
Air in Friel System.
Overspeeds. Shuts down with Overspeed
LEOs ON.
Engines
&
Generators
5