Engine Sync Switch

Discussion in 'Electrical Stuff' started by Al Andalus, Feb 19, 2018.

  1. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    Hi all, Can someone help me please. I have a Sea Ray 360 Sundancer (395 European spec) year 2002. On the main control station, at the helm, there is a red 'Engine Sync Switch' with an off, auto and on position. It has battery symbols at the top and bottom on the switch. It is located near to the engine start switches.

    I have looked in the manual to find out what this switch does but there is nothing I could find. Can anyone help me with what this switch does please. It's probably a stupid question but I can't seem to find the answer in the owners manual.
     

    Attached Files:

  2. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    That's an unusual looking switch. Perhaps more common in the UK? Engine sync, however, is not uncommon. Sync is a system that enables you to run both engine throttles with a single throttle control level.

    If you google "engine sync" you'll get all kinds of info. You'll want to find a manual before you use it. There are some tricks to using it correctly...
     
  3. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    Yes. This is the first time I have come across something like this. I tried googling "engine sync" and all I've managed to find is what you've said about running both engines with one throttle.

    What confuses me is the battery symbols on the switch which is why I thought it may have something to do with batteries rather than engines. Thanks for coming back to me so soon on this.
     
  4. Michael Mirra

    Michael Mirra Member

    99
    Jan 18, 2017
    Rock Hall, Md
    360 Sundancer 2002
    8.1 Horizon X 2
    I have the same boat but with gassers. I don't have the engine sync option just a blank switch cover there. The battery symbols make it look like it could be the solenoid switch (having a brain fart here and can't remember what its actually called) that connects your port and starboard batteries together when one bank is to low to start is't corresponding engine. Mine is just to the left of the engine sync switch. From the pic it kind of looks like you have a different switch in that spot so maybe it is your battery switch.
     
  5. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    Hi Mike
    I have a switch in between the two ignition switches that I think does what you mention in your reply. From what I have read in the manual the one between the two ignition switches connects the port and starboard should one bank of batteries be low. That seems to correspond to what you've mentioned.
    It's this Engine Sync switch that has confused me as it has battery symbols on it.

    I did pop down to the boat earlier to have another look and when I put the switch in the AUTO position there was a clunk from the engine bay after about 30 seconds as if a solenoid or something had kicked in.

    Just had a reply from Sea Ray and the switch is not an Engine Sync Switch and appears to have been put in by a previous owner. The mystery continues as to what it does. Will have to go back and track where the clunk is coming from ????
     
    Last edited: Feb 19, 2018
  6. gdavis67

    gdavis67 Member

    96
    Mar 1, 2017
    Saugatuck, MI
    1990 390ec
    Twin 454 Mercruiser T 340 with Hurth drives
    I believe that this is a battery combiner switch that someone added on to your system. It looks like they used an empty or unused spot on the dash for it. See the picture and take a look at blue sea's link to see what it is and how it works. I had a similar set up on a previous boat that was not factory equipped with a ACR or house battery bank.

    https://www.bluesea.com/products/76...rging_Relay_with_Manual_Control_-_12V_DC_500A
     

    Attached Files:

    The Bill Collector likes this.
  7. The Bill Collector

    The Bill Collector Well-Known Member SILVER Sponsor

    Jun 2, 2008
    Tacoma, WA
    450 Sundancer
    3126 Cat's
    +1
     
  8. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    gdavis 67, You are a star. That explains it. Switch is same and the there is also the same looking relay type thing in the engine bay. Many thanks to everyone that has replied.
     
  9. gdavis67

    gdavis67 Member

    96
    Mar 1, 2017
    Saugatuck, MI
    1990 390ec
    Twin 454 Mercruiser T 340 with Hurth drives
    Glad we could help.
     

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