Westerbeke problems

[gwido1]

I have a 2000 340 Sundancer with a 4.5 BCGTC . When I hit the start button it blows th 8 amp fuse . This happened last year, I changed a few sensors and it worked. This year it ran for a while, now same thing . Any idea why that fuse blows ? Any trouble shooting ideas?

 

[Boater420]

Welcome to CSR!

Here's your operator manual:
https://www.westerbeke.com/operator's manual/42832_bcgtc_gas_operat_man.pdf

Here's the electrical troubleshooting manual:
https://www.westerbeke.com/troubleshooting guide/bcgt_troubleshooting_manual.pdf

Here's the electrical diagram:
https://www.westerbeke.com/wiring diagram/4.5-9.6_bcgtc-src_(43847).pdf

The 8 amp fuse (in my diagram yellow from switch to 8amp >> red to K1 relay) goes to the K1 relay, its probably bad, or the k2 relay is bad. Take the K1 out of the loop and see if the 8amp blows, if not its the relay.

 

[Stee6043]

My profile pic is my Westerbeke...The bane of my boating existence. Good luck with getting her running! I try to keep in mind that it could be worse, we could own Kohlers. ha

 

[ande1416]

Hello -

I had the same thing on mine just the past two week. See below.

I seemed to have solved this, I was at boat yesterday and had the gen running without any issues. Look at the emergency shut down sensor, there are 3. One near the thermostat, one near the oil filter, and one on the exhaust manifold. Two of mine went bad when the pump bracket broke and when I tried to start if from the panel it blew the fuse. I replace the exhaust and thermostat sensor (one tested bad and the other not to spec). The oil pressure sensor threw me, I tried to jump it but it would not run. Then I noticed conflicting information that it was an open sensor not closed. Without the jump it ran, and then hooked up same.

SO, I would start with testing those three sensor with a meter or jumping the water and exhaust and disconnected the oil. If it starts without blowing a fuse hook up one at a time and to isolate the bad sensor.

BTW - Also check the oil level, your unit's oil pressure sensor may be sensitive.

Hope this helps.

++++++++++++++++++++++++++++

My 4.5 gen was running fine but I noticed it was not pumping water well, figured it was a failing impeller but turned out to be the water pump bracket broke. I replaced it, unfortunately with the same bolts that worked loose and caused an overheat shutdown.

Now I can start the gen from the unit itself, but as soon as I release the switches it shuts down. Replaced the sensor for water temp, and exhaust temp as both seem not to test to spec. Jumped oil pressure without any change.