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582L Ducer Delima-Need 2nd opinions

Old 01-08-2003, 06:36 PM
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Default 582L Ducer Delima-Need 2nd opinions

Last year I bought a new cat hulled boat and had the builder install the transducer- thru hull. When the boat was delivered the ducer was installed in the 9 degree deadrise section of the starboard sponson. I was dissapointed that they didn't install a fairing block but the installation was within the 10 degree Furuno spec on vertical angle. The unit worked properly when I sea tested the boat so I accepted the installation(old enough to know better). Last weekend I had problems with the unit loosing the bottom, had to stop the boat for it to regain bottom. The display also fogged in the center, so I pulled the unit to send to Furuno for repair. Here's my delima. How much of the bottom loss problem is as result of the unit vs. the ducer angle. Initial sea trials were in 80 degree water and water temp now is 50s. I'm thinking of adding a ducer fairing block but I don't want to remove the cable since the conduit to the CC is quite full and I don't think I can pull the coupling back thru. HERE'S WHAT I'M THINKING(that may be nuts). I'm thinking about preparing the fairing block and then cutting the thin side to allow it to slide on the ducer shaft (with nut loosened). Then placing a fiberglass/epoxy layer over the block to rejoin the pieces. I would have to trim and sand the rejoined the block before sealing and re installeng the ducer. My option to the above would be to buy another transducer and pull it thru the port sponson conduit, installing the fairing normally. Man, am I tired of boat wiring and rigging.
Sorry for the post length.
Any thoughts?
Joe

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Old 01-08-2003, 07:04 PM
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Default 582L Ducer Delima-Need 2nd opinions

I know you can splice the transducer cable. Just make sure the splice is above the bilge area. Look in the owners manual or go to the Furuno website for more info.
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Old 01-08-2003, 08:17 PM
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Default 582L Ducer Delima-Need 2nd opinions

gottaway,
I thought about that but I'm uncomfortable with splice. I'll read the manual but I think Furuno's advice will be not to splice. It's my nature to make everything black and white, right or wrong, It's that engineering school background I guess.
Thanks
Joe

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Old 01-08-2003, 08:27 PM
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Default 582L Ducer Delima-Need 2nd opinions

Its been butchered once allready,Just pull it and do it right.Its not that much more work,you can attach a cord to the cable lead if its a hard to run cable.JMO

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Old 01-08-2003, 08:32 PM
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Default 582L Ducer Delima-Need 2nd opinions

If you don't want to splice I would suggest you remove the fitting at the end, attach a pull rope to the end of the cable (butt to butt with adhesive tape overlap so the joint is smooth). Pull the cable, cut the rope/cable splice, do the fairing, rejoin the rope/cable, pull back forward, re-install the fitting.

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Old 01-09-2003, 04:59 AM
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Default 582L Ducer Delima-Need 2nd opinions

There is a snag in your current plan anyway, so you're gonna end up removing the transducer no matter what. The hole they drilled into the bottom of your boat is circular, but if you install a fairing block the hole though the hull will have to become an elipse - think about it. You have to remove that transducer to enlarge the hole in a port/starboard direction to accomodate the relative angle of the stem when you put a fairing block in there.

So, with that being the case you have to remove the transducer completely to get to the hole (unless you are willing to take the chance on damaging the cable while enlarging the hole). I'd just tie a length of 400 pound mono to the the existing cable, soap it down real well, and pull it out. Drill the hole quickly and reinstall the transducer, once again with lots of liquid dish washing soap as a lubricant, and pull the cable back through there. After all, someone at the dealership was able to do it, you will be able to as well.

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Old 01-09-2003, 05:36 AM
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Default 582L Ducer Delima-Need 2nd opinions

I agree with the above. I'd say 100% of the bottom loss is due to the angle. Having said that, when the boat is 'rocking' are you gaining and losing bottom?

"Never enough time to do it right; ALWAYS enough time to do it over." Boston Whaler, "MUMBLER", 24' Outrage (1996), twin 175 HP Evinrude Ocean Pros.
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Old 01-09-2003, 08:18 AM
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Default 582L Ducer Delima-Need 2nd opinions

Just looses it while traveling in a straight line. I knew what I really needed to do but I just needed a few swift kicks in the ass to get started. The signal strength does get weaker at high speed. I think some of the problem is due to the angle of attack to oncoming swells on the sponson and the offset angle of course. But some additional weakness came along with the fogging I think. Thom, I think I'll have to cut the cable to get it out. All the controls and wiring were routed mostly thru the starboard conduit and I had a tough time pulling the autopilot sensor wiring thru. Have plenty or room in other conduits though. I'm sending the unit back this week but I think I'll wait for warmer weather to do the transducer job. Even with the high speed signal loss the unit works plenty good for snapper/ grouper fishing.
Thanks for the thoughts.
Joe

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Old 01-09-2003, 04:41 PM
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Default 582L Ducer Delima-Need 2nd opinions

You could try to use the long high speed plastic fairing block made by airmar cut it to fit the angle of your hull,then cut the the piece that attches under the hull again lengthwise ,two side halfs,glue them together and bolt them together with stainless machine screws counter sunk and filled with life caulk for a smooth surface.JMO

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Old 01-09-2003, 05:39 PM
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Default 582L Ducer Delima-Need 2nd opinions

As Thom pointed out, I'll have to check the size and angle of the existing hole thru the hull. If it's too tight, I'm shafted on the retrofit idea. It will all depend on how mich time I have when I break out the tools. If the tuna are hanging around the Navy towers by then, I'll throw a new ducer($100) at it, slap the block on and skip the boat into the water.
Thank for the thought.
Joe

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