Engine Sync Switch

Discussion in 'Electronics Q&A' 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. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    Engine sync is an option that could have been ordered with your boat when it was new.
    Once you get to about 1000 or so RPM (can’t remember the exact number) you hit the switch and it engages a system that enables you to control the speed of both engines with just one throttle handle.
    Although the panel in your picture says engine sync the switch under it looks like some sort of battery controller so a previous owner may have installed something and placed the switch in an empty spot on the panel that was available because your boat came without that option.
    To see if your boat has the sync option:
    The one on my boat is made by Glendenning. Google Glendenning engine sync and look at any images you can to see if they match up to a box and cable system that is in your bilge.
    If not, yours might be a different brand, Contact Sea Ray customer service to see what the boat came with or ask an owner of the same year and model as your boat and see what that brand might be and look for that.
    If you can’t find a sync system hooked up to your motors then it’s probably the scenario I suspect.
     
    Last edited: Feb 19, 2018
  3. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    Many thanks for the reply, I had wondered what this was for and googled it but came up with what you mentioned initially. The thing that confused me was the battery symbols on the switch.
    I have always had this in the OFF position but my mechanic was on last week and for some reason had turned the switch on. When I turned it off I heard a clunk from the engine bay. I turned it to AUTO and after 30 seconds there was another clunk in the engine bay. It was almost like a relay switch or something electrical turning on.
     
  4. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    Clunk nose from the bilge could be from a relay of some sort but it’s hard to speculate on what it is.
    Judging by the picture of the switch I think it may be some sort of battery relay. But who knows what a previous owner may have done?
    It would be nice if the boat came with a sync system, but there is no guarantee the original owner checked off that option box on the order sheet.
    On the other hand, maybe the boat does have the sync option and the switch needed to be replaced and the previous owner for some strange reason opted to use that one.
    Can you stand in the bilge while someone turns the switch on and off to try to isolate where the clunk noise is coming from?
     
  5. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    The mystery continues, Sea Ray came back to me and don't recognise the switch so it looks like it has nothing to do with engine sync but has just been put where the engine sync switch was by a previous owner. So will have to get down in the engine bay and see where the clunk comes from.
     
  6. atrick

    atrick Member

    86
    Mar 4, 2017
    Penna
    1995 searay 290 Sundancer
    1990 21 maxum
    Twin 4.3 mercrusers with alpha one drives
    305 chevy with a alpha one drive
    emergency start switch to tie batterys together for twins when 1 battery is dead?? Just a guess
     
  7. Al Andalus

    Al Andalus New Member

    26
    Oct 27, 2016
    UK
    360 Sundancer (395 International)
    Yanmar
    Hi atrick, nice guess but there is already an emergency start switch between the two ignition switches.
    It does make sense though as the battery symbols at the top of the switch seem to imply you can join two banks up. However just been given the answer to what this is and it tallies up with the relay type switch in the engine bay. Thanks everyone who has replied and for all your help on this.

    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
     
    Last edited: Feb 20, 2018
  8. Steve S

    Steve S Active Member SILVER Sponsor GOLD Sponsor

    629
    Jun 5, 2007
    Northern IL.
    2000 400 Sedan Bridge with twin CAT 3116's

    2000 340 Sundancer - SOLD!
    210 Monaco 1987 - SOLD!
    Twin Caterpillar 3116's 350 HP straight drives
    Al,

    Glad you figured it out!

    FYI - You do not need to post the same question in multiple forums. Most regulars use the "New Post" function and will review it there and respond.

    Steve
     

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