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Compass location on 72' San Lorenzo MY 2012???

Discussion in 'Electronics' started by Capt J, Sep 10, 2020.

  1. Donzi 54

    Donzi 54 Member

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    Get a hold of a wire tracer and you can follow the wire in the bundles to where the wire is going.
  2. Capt J

    Capt J Senior Member

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    So I tore more of the boat apart today. Master stateroom floors, nothing. Both midship twin staterooms.......found raymarine autopilot compass under starboard twin, mounted 5" above a 1" stainless hard pipe.......BRILLIANT and no wonder why it has so much deviation from actual. When they could've mounted it a few feet forward without any metal next to it. Port midships twin, nothing.....tore apart lower helm overhead like San Lorenzo said and nothing......I can't even find the wire for this compass from where it exits the engine room. It's over 1/2" thick and distinct dark grey color. I'm wondering if they mounted the **** thing under the fuel tanks. In the past tore every bilge access open, master ceiling, pilothouse ceiling, galley ceiling.

    Cannot find ZF JMS (joystick compass) anywhere. More emails to Italy. Next step is to run another wiring harness and mount it in the master floor forward of the bed........then have to calibrate the joystick all over again.....I've done that on another new boat and it took a lot of time.
  3. Metatron

    Metatron New Member

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    As Donzi says, get a wire tracer. Essentially, they inject an RF signal into a wire in the cable and use a RF receiver to trace the wire. You should be able to inject a signal at the AP and easily trace it through the vessel. You would have to unplug the cable from the AP and select a signal wire to trace. It shouldn't be a ground or power wire.

    https://www.thedrive.com/reviews/30535/best-wire-tracers

    This is a result of a quick search for wire tracers. They seem to be less than $100. I haven't used one for a while but when I did need one, it worked.
  4. Capt J

    Capt J Senior Member

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    The multi conductor cable goes into a chase in the front of the engine room. It is a very distinct dark grey color and over 1/2" thick. All of the other multi conductor cable/wires on the boat are in a very light grey sheething, off white perhaps even. It would stick out like a sore thumb, as all of the other boats wiring is that very light grey (off white color). IF I saw the Maretron compass wire anywhere, you can't miss it. So no need for a wire tracer. I looked through the bundle coming through the master head in the same location, but it is not there. The boats fuel tank is in between that, so it must split off prior to entering the interior at that level, but we can't find it ANYWHERE.
  5. mapism

    mapism Senior Member

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    Nice to see that some of my memories are still correct: that's as per my suggestion in post #6.
    I'm afraid I never came across a SL equipped with a ZF joystick, though.
    So, if you are sure that there's nothing else in the area where you found the a/p compass, I have no other ideas to offer.

    Except one, actually: remove the joystick, chunk it overboard, and call it a day.
    Nothing like getting rid of useless bits to improve the overall reliability of any boat!
    Last edited: Sep 18, 2020
  6. Liam

    Liam Senior Member

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    Okay taking away Westport from the equation comparing a SL to any of the above is really fuckin nuts. I mean they are more or less custom builds, and most medium sized SL where actually build more for the Euro market. You go in a marina visit 5 SL's and would find out that five of them are actually different.
  7. olderboater

    olderboater Senior Member

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    I would agree to a point. The factory should still be able to tell you where they installed the Compass. They should have some drawings with it planned and completed. They should also have norms.

    Now, there is the possibility this wasn't done by the factory and some part of it was done aftermarket.
  8. Pascal

    Pascal Senior Member

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    The 2009 lazzara 84 i run has two binders, about 2” thick. One of them includes not only all the blueprints, diagrams and schematics needed but also actual pictures of every component, system, hatch, etc. someone at the factory spent hours taking pictures of the actual systems on each boat built.

    pretty handy... and every page is laminated!
  9. Capt J

    Capt J Senior Member

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    Yeah, they're all different because San Lorenzo used 5 different sub contractors on all 5 boats, and none of them followed whatever plans there are, and nobody cares they're not. The ZF JMS joystick compass should be in the exact same location on every boat because San Lorenzo has to tune the joystick to the boat and then that program is programmed into each subsequent boat, but compass has to be in same location on each boat.

    Bottom line, nobody paid attention to the build or supervised it. Boat has hard piping throughout. Most bilge accesses have hard pipes run right through the middle of where the bilge access openings are, but instead of putting the outside hardpipes next to the stringers, they spaced them 5-6" apart, through most of the bilge access openings, so you can't even get your arm between the hard pipes......can't reach the bilge underneath........Same in the engine room. Whereas if they spaced them properly, you could have access to everything. Stands of equipment block access to seacocks. Whale gulper grey water pumps mounted 4" above the bottom of the center bilge in the stern. They used Gate valves for the main engine seacocks and other seacocks and the main engine seacock handles sit in the bilge water and are all rotton......I could go on for pages about this beauty. Even the rear engine room bulkhead isn't square in the boat, the aluminum diamond plates are all cut at a slight angle to make up for it......how do you screw that up??????
  10. Liam

    Liam Senior Member

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    They are different because they are made to order. Sub-contractors for Euro boats are the same for plumbing and electronics with the exception of year changes. Wood working is sub-contracted to different companies depending the style.
    You could also get your stylist and do it as you wish. For electronics I think it depended what you did. If you did Raymarine they get the RM guys, if its Garmin you get the G guys and so on so forth.
    It is possible that the scenario changes for US boats especially for electrics.
    Also remains to be seen that this SL you are working was an original USA or EU boat. They had a long period when SL was represented by Viking if I remember well.

    Lazzara mentioned here was a full on production boat, you could change little things in a Lazzara. What you are saying on Lazzara I have seen in Azimut and Ferretti who are twenty year old or more.
    The manual is full of pictures, so nothing new there I guess. Also a Riva manual from mid eighties was made that way.