Boater420
Well-Known Member
- Mar 11, 2015
- 1,259
- Boat Info
- '97 330 Sundancer
V-Drives
Westerbeke 4.5BCG
- Engines
- Twin Merc 454's
Hello,
I have a Westerbeke 4.5 BCG in my 1997 330 DA which was running perfectly all day and night prior to this issue. My generator is shutting down after running for a while. Sometimes an hour, sometimes two hours. Here's what's happening...The generator fires up perfectly. Once warmed up I can apply a load with no problem (AC, hot water, outlets, microwave) and it continues to run perfectly. Right before it stops running, I hear the engine RPMs increase and then it dies like it was shut off at the switch.
Two things I've noticed:
1. As it's dying, I can press the "Stop" switch and it will continue to run for a few seconds and then the same thing happens again...Increased RPM's and then dies.
2. I can press the "Stop" button as it dies and it will continue to run for a few more seconds, however if I also press the preheat button it will stay running for as long as I hold the switch...let go of the Preheat and the engine RPMs increase and then it cuts out.
Generator Condition:
New oil & Westerbeke filter
Coolant just changed
New Spark Plugs
New Impeller and rebuild on sea water pump
I've tested the internal temps with an IR Thermometer and they are all within operating specs. Nothing hot to the touch, so I don't think it's overheating. It stays running for hours so I don't think it's oil pressure. I'm leaning towards the Overspeed Shutdown Board as the culprit. I've heard it can be bypassed by taking the T3 terminal and moving it to T5 terminal? When is this done, before or after the unit dies the first time?
Any advice or ideas appreciated.
I have a Westerbeke 4.5 BCG in my 1997 330 DA which was running perfectly all day and night prior to this issue. My generator is shutting down after running for a while. Sometimes an hour, sometimes two hours. Here's what's happening...The generator fires up perfectly. Once warmed up I can apply a load with no problem (AC, hot water, outlets, microwave) and it continues to run perfectly. Right before it stops running, I hear the engine RPMs increase and then it dies like it was shut off at the switch.
Two things I've noticed:
1. As it's dying, I can press the "Stop" switch and it will continue to run for a few seconds and then the same thing happens again...Increased RPM's and then dies.
2. I can press the "Stop" button as it dies and it will continue to run for a few more seconds, however if I also press the preheat button it will stay running for as long as I hold the switch...let go of the Preheat and the engine RPMs increase and then it cuts out.
Generator Condition:
New oil & Westerbeke filter
Coolant just changed
New Spark Plugs
New Impeller and rebuild on sea water pump
I've tested the internal temps with an IR Thermometer and they are all within operating specs. Nothing hot to the touch, so I don't think it's overheating. It stays running for hours so I don't think it's oil pressure. I'm leaning towards the Overspeed Shutdown Board as the culprit. I've heard it can be bypassed by taking the T3 terminal and moving it to T5 terminal? When is this done, before or after the unit dies the first time?
Any advice or ideas appreciated.