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Old 12-15-2020, 01:21 PM   #1
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Westerbeke generator

Iíve got a 5.7 Westerbeke generator that was running fine and then stopped. Now Iíve noticed that when I engage the pre-heat button nothing happens at all. Although it will turn over but will not start. I know I had a problem with the water temperature switch that got shorted out and I just replaced it several months ago. Any idea where I should start checking. I disconnected the remote switch and the same thing from the starter switch on the generator itself
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Old 12-15-2020, 02:29 PM   #2
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Glow plug need replacement?

Note I had similar issue with my NextGen this summer, we tried all sorts of options. Finally got a gen specialist to look at it at the end of the season and he determined it needed to go back to factory for rebuild.
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Old 12-15-2020, 02:57 PM   #3
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When you activate the pre heat, on our Westy, you hear a loud click/clunk which is an electronic solenoid opening the fuel shut off valve. This solenoid stays activated as long as the engine is running.

Head down to the engine room and get someone to activate the pre heat - if it doesn`t move - here is your trouble shoot start point.

Good hunting
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Old 12-15-2020, 03:34 PM   #4
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Do you have the wiring diagram?
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Old 12-15-2020, 04:29 PM   #5
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See the diagram in the enclosed PDF.
Attached Files
File Type: pdf bcda_bcdb_technical_manual.pdf (159.4 KB, 36 views)
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Old 12-15-2020, 05:41 PM   #6
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Check the starter relay in the electrical box.
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Old 12-15-2020, 05:44 PM   #7
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When I hit the pre-heat switch, nothing happens no noise like it normally does it doesn’t do anything.
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Old 12-15-2020, 05:46 PM   #8
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However, with the pre-heat switch selected and the start switch engage the engine will turn over
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Old 12-15-2020, 05:47 PM   #9
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I have read were the pre-heat switch will actually disengage all the temperature switches. So that you can start the engine.
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Old 12-15-2020, 06:18 PM   #10
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If on preheat and you get nothing, look for a bad fuse or crappy connection. In preheat, glow plug solenoid, fuel solenoid and fuel pump should make noise.
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Old 12-15-2020, 06:48 PM   #11
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Checked the fuse and it’s fine I guess I should check the connections in the electrical box on the generator
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Old 12-15-2020, 07:12 PM   #12
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I have been having issues with starting my Westy. We found the starting relay had corrosion on the pins and after replacement of the relay it runs great. The corrosion was caused by a small hole in the exhaust hose. This in turn caused a mist that affected the electrical connections inside the electrical box.
Hope that helps.
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Old 12-15-2020, 07:19 PM   #13
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OK, I will check the relay first thing in the morning. I certainly appreciate all the help from everybody.
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Old 12-15-2020, 07:33 PM   #14
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Westerbeeke

My 8kw has a switch on the genset itself that will let it turn over, but not start....any chance you knocked that?
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Old 12-15-2020, 07:50 PM   #15
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No I saw that switch and it was actually on
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Old 12-15-2020, 07:55 PM   #16
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Also, we have a 20amp 12v circuit breaker that is a red button right behind the starter solenoid. Check that.
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Old 12-15-2020, 07:57 PM   #17
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I checked the circuit breaker, Iím getting voltage to both sides of the breaker so Iím assuming itís working OK
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Old 12-15-2020, 08:37 PM   #18
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Remember to check volts under load. Put meter on terminal of say the 20A breaker and get a reading. Then hit preheat and check reading again. A bad connection or bad breaker can show 12v with no load and go to zero with a load. Alligator clip leads are your friend here, otherwise not enough hands.
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Old 12-15-2020, 09:17 PM   #19
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I have had the same problem with a 8KW WB. I sent you a 2 page wiring diagram.

Did you follow the pressure and temp sensors? They are all in a series and will shut it down even with it cranking.

They are marked up on page two!
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Old 12-16-2020, 11:18 AM   #20
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After a similar experience, and on the advice of my mechanic, I got mine going by pulling the main power cables off the start battery, cleaning and greasing the connections and reconnecting. These red gensets need full power, don't tolerate any reduction in voltage, however caused.
Just somewhere to start.
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