westerbeke issues

Discussion in 'General Maintenance/Repair Questions' started by Xplicitlnck, May 27, 2014.

  1. Xplicitlnck

    Xplicitlnck New Member

    Jan 2, 2012
    Long island ny
    330ec
    Twin 7.4 straight drive
    I have a westerbeke 4.5 bcga. I fired it up to cook breakfast and she ran for 15-20 minutes then shut down. I don't have a display so no codes. I tried starting it and it did start but as soon as I let go pf the start switch (not the ignition to spin the starter but the switch u hold b4 pressing the start switch) she shuts down. It acted lile thia for about half a day then I tried again a couple hours later and she runs fine now for hours and houra without a hickup... water flow was perfect. Could it b the oil pressure sensor. I hear they did have issues with them. .. oil levels are good with fresh oil last week. Any ideas
     
  2. Ididntdoit

    Ididntdoit Well-Known Member

    Dec 5, 2007
    East Coast Florida
    300 Sundancer
    5.0MPI Bravo III
    that switch bypasses the shut down sensors so thats why it stopped running when you let it go.....could you have had reduced flow due to a plastic bag or jellyfish (remember those from BI) - if you moved the boat (or it floated away when you shut down) your problem may have disappeared.....if it happens again bypass the sensors one by one to find the culprate....
     
  3. Xplicitlnck

    Xplicitlnck New Member

    Jan 2, 2012
    Long island ny
    330ec
    Twin 7.4 straight drive
    Gotcha thanks . I had good water flow the entire time so yea but It's very possible and yes those jellyfish were nasty lol
     
  4. PlayDate

    PlayDate Well-Known Member SILVER Sponsor

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    It could be a couple of things.....but my bet is a sensor got tripped based on what you described. If it is a sensor, it will happen again.

    If this is the first time you have used it this season.....I would also place a bet on fuel. These are small engines and are very sensitive to water in the fuel.

    -John
     
  5. Xplicitlnck

    Xplicitlnck New Member

    Jan 2, 2012
    Long island ny
    330ec
    Twin 7.4 straight drive
    I don't think it's the fuel because if I hope the button down it runs and when u Let it go she emediatly shuts down. So what sensors do I have? Oil temp and water pressure? Any others? There was a thread up a couple weeks ago about the oil pressure sensor having a none problem I think I'm gunna change that and hope it never happens again. The start button bypasses the oil pressure sensor until u build enough pressure for the sensor to register and when u release the switch it allows the sensor to take over I'm thinking the sensor is bad therefore when u release the switch the sensor turns the engine off? Sounds good? Next question were can I get the sensor other then westerbeke. I could only imagine what they r asking for it
     
  6. Ididntdoit

    Ididntdoit Well-Known Member

    Dec 5, 2007
    East Coast Florida
    300 Sundancer
    5.0MPI Bravo III
    You probably have engine temp, exhaust temp, oil press - I dont know if you have overspeed on that unit or not.....best thing is to bypass one at a time if it ever happens again (as long as your sure all is ok with water flow, oil level, etc) if your hell bent on replacing the sensor, I have the best luck with CARP out of Grant, FL for the best price on westerbeke stuff, I have no idea where they source that sensor...
     
  7. bahamabreisus

    bahamabreisus Well-Known Member

    Oct 25, 2007
    Hampstead NC
    500 dancer, previous 420,390,300 dancers
    detriot 8v92
    Ours will do that, with as little as 1/2 qt low. They don't hold much, so a little low is a large percentage of capacity.
     
  8. dcpringle

    dcpringle Member

    438
    Dec 13, 2012
    CT River
    2000 Sea Ray 480DB "Diamond Girl"
    Cat 3196 660HP
    You can pull the manuals for the generator from Westerbeke, look at the wiring diagram and determine which of the sensors is normally open (NO) vs normally close(NC). You simply then find where they are on your particular engine. Hope that helps..
     
    Gary Todd Knudsen likes this.
  9. Gary Todd Knudsen

    Gary Todd Knudsen New Member

    7
    Aug 9, 2018
    Baltimore
    Sundancer 330
    454 Mercruiser
    I’m having the same trouble but without a manual I’m fumbling through the motor oil pressure sensor jumped., not that one
     
  10. In Two Deep

    In Two Deep Member

    236
    Aug 23, 2007
    Long Island Sound
    2001 340 Sundancer
    8.1 Mercruiser
    If I am understanding this correctly, the engine stops running when you release the "PreHeat" switch? I believe this switch controls the chock. My genny would not run without that switch activated. I actually taped it down to keep things running. It turned out that the carburetor was all gummed up and the chock was not functioning correctly. Perhaps you need to clean the carb and maybe add some fuel treatment and see if the problem resolves itself. An easy first step. Good luck!
     
  11. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    You taped the pre-heat switch down? Yikes. That switch also bypasses all of your safety sensors (heat, water, oil). Most folks would not recommend defeating that safety feature for a substantial period of time unless you were 100% certain there were no actual problems with any of the systems.
     
  12. PlayDate

    PlayDate Well-Known Member SILVER Sponsor

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    One of the more frequent things I have seen lately with new boat owners is that they try to start the generator at the generator and the remote panel switch is in the OFF position. It will start but immediately die once the Pre-Heat switch is released.

    Under no circumstances do you want to tape down the preheat switch. First, that means the control board, choke circuit and fuel pump are energized bypassing the safeties and the stop switch....really bad idea.

    In regards to safeties, if the generator starts and runs for a while then quits after 15-20 minutes it may be one of the safeties:

    First in line and most common is the raw water intake is clogged and water flow is restricted to the point that the exhaust high temperature switch trips and shuts down the generator. Unfortunately, clearing the blockage (at the intake port or strainer) does not solve the problem because the impeller or pump has been damaged by the time it shuts down.

    Second in line is low oil or the wrong oil. Generators have oil pressure safety sensors and will shut down if oil pressure drops below their minimum.

    Last is the generator engine itself is overheating. This can be caused by a bad thermostat, clogged heat exchanger or that raw water flow is insufficient to cool the heat exchanger.

    The easiest way to determine a safety has been tripped on a running generator is to restart it. If it starts and dies immediately (upon releasing the Preheat switch) or shortly after starting....there is a good chance a safety has tripped.
     
    Gary Todd Knudsen and kap2 like this.
  13. Gary Todd Knudsen

    Gary Todd Knudsen New Member

    7
    Aug 9, 2018
    Baltimore
    Sundancer 330
    454 Mercruiser
    I believe I’m trying the safety switches
     

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