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Fishfinder installation ? Scout Dorado

Old 04-13-2003, 01:23 PM
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Default Fishfinder installation ? Scout Dorado

I have the transducer installed for the Garmin 240 and am now working on the other end. I have to work under an angled windshield to drill 4 bracket holes and one 1" hole for the cable. Assuming I get the cable hole drilled [it will be the tightest for the drill to fit] what type of fitting is used to seal the 2 cables around the hole? Also it sounds like my electrical set up is similiar to the Carolin Skiff installation recently discussed. I plan to use one of the accessory switches. It has two connections. One for the red wire from transducer for power and the second is for an existing jump wire that goes just above to a small white rectangular box.[every accessory has one of these] I am guessing it is a circuit breaker. There is a rubber toggle cover on the dash on the other end of this thing that feels empty. Is that because if the breaker trips it throws a switch into this boot for reset?My next question has to do with where to pick up ground. There is no key switch on the panel. Just trim indicator, tach and fuel gauge. Last question has to do with where you coil up the extra transducer cable. In the battery compartment or under the dash?

Followup: I just finished drilling 1/16" pilot holes. [4 for mount and one a slight angle for cables] With a right angle chuck and the drill all the way in the chuck I just barely fit under the windshield. The cable pilot hole is at a slight angle.[I am hoping a 1" hole saw will fit even if at slight angle] What if I used screws instead of bolts for the mount? It may be easier to drill a screw hole than a bolt hole although bolt holes don't need as much accuracy.The larger the drill bit the longer it gets! Put things away for the night and will start tomorrow with fresh mind and hopefully some fresh ideas.

[This message was edited by JackB on 04-13-03 at 05:19 PM.]
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Old 04-14-2003, 04:24 PM
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Default Fishfinder installation ? Scout Dorado

Seems like I am answering my own posts but have to keep the project moving if the boat is to hit the water.
I decided to bolt on unit as it just seems more secure. I realized when using the countersink to prevent fiberglass from chipping that if I just kept right on going it would make a 5/8" hole. Just the size I need for the cables. It is short enough to fit so I will try that tomorrow.
Still would like help in where to get ground. Remember I do not have a breaker panel, just individual switch breakers. It is very hard to see behind the dash due to wires holding instrument panel and the #$@% steering wheel. The tach is probably grounded at engine. Can I tie in to tach ground? Any others idea to seal cables thru dash other than rubber grommet?
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Old 04-14-2003, 04:51 PM
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Default Fishfinder installation ? Scout Dorado

Jack,

I have a (1998)202 and was installing a VHF today and I also have the same switches that you describe. I also would assume that the sm boxes above the switch is some kind of breaker. I had one out looking at it but there are no definitive markings on the switch to identify it as such. Anyway, I was going to use one of the accessory points but after talking to few people they have talked me into wiring the VHF right to the battery. That way if things go south with the wiring the radio will still work.

As far as the ground goes, if I am on my back looking up at the steering wheel, the acc switches are to the right and there are several things to the left one of which is a ground block. Looks like there are a few spots open as well. I would use one of these if you could. Let me know how you make out. I will be in the boat (in the driveway) finishing up my boat tomorrow.
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Old 04-14-2003, 08:40 PM
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Default Fishfinder installation ? Scout Dorado

Jack,
I'll try my best to help ya out, but I'm/were going to need a little more info....! Can you take pretty pictures of the little "white thingys", I just ain't follo'in some a dat??

Anyway, I'll answer what I can for ya:

1. what type of fitting is used to seal the 2 cables around the hole?

You need a grommet to seal the hole or holes around the wires. Get'em at any Marine store, just tell them how thick your wire is, and the diameter of the hole you drilled. West Marine sells a small pack of mixed rubber Gromets for couple potatoes. Pick the proper size out and stick it in.

I plan to use one of the accessory switches. It has two connections.

Thats fine as logn as it is not already used for something else. It's empty, right?

One for the red wire from transducer for power and the second is for an existing jump wire that goes just above to a small white rectangular box.[every accessory has one of these] I am guessing it is a circuit breaker.

The "jump" wire is the power lead. That is where the switch gets it's power from. The small white rectangular box is indeed your circuit breaker. If your device or wire should short out anywhere for some reason, this breaker will "pop" which disconects the switch (and your unit) from the power to protect it.


There is a rubber toggle cover on the dash on the other end of this thing that feels empty. Is that because if the breaker trips it throws a switch into this boot for reset?

You got it!!

My next question has to do with where to pick up ground. There is no key switch on the panel. Just trim indicator, tach and fuel gauge.

You should have a Neg 12vdc grounding terminal block somewhere around there. Has to be. There should be a row of screws all connected. and they either black and/or green wires connected to them. That's your grounding terminal. If you cant find it, I suggest you follow the ground lead from one of your gauges or other instruments, you will find it that way.

Last question has to do with where you coil up the extra transducer cable. In the battery compartment or under the dash?

I'd keep them away from the Battery's. That could produce noise. You want the cables as far away from anything electronic or magnetic. Coil them up in a safe dry spot under the helm. Fasten it down securley, remember the boat will be getting tossed around alot. Even if it is a Scout!!

Still would like help in where to get ground. Remember I do not have a breaker panel, just individual switch breakers. It is very hard to see behind the dash due to wires holding instrument panel and the #$@% steering wheel. The tach is probably grounded at engine. Can I tie in to tach ground? Any others idea to seal cables thru dash other than rubber grommet?

Yes you do have a "Breaker PAnel". That is the thing the "little white boxes" are attached to. Thats your "breaker panel".

Follow Lobsta's lead (no pun inteaded!) on where to find the grounding block, that is it, with extra screws available. You will need either spade or ring terminals connectors for 14-16 gauge wire which is what most radios are.

Good luck!!

Birdman, Capt of

Scout Abaco 280 Click here!
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Old 04-16-2003, 06:56 PM
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Default Fishfinder installation ? Scout Dorado

Just to remind all that things are never as easy as they sound. I drilled the 5/8" hole for the cables with a countersink which is the only thing short enough to fit under windshield in a right angle chuck. Had to finish enlarging hole with file. THEN... after picking up rubber grommet which was suggested, I find that the space around the edge of the grommet is not wide enough to fit around 1/4" fiberglass. I used a razor blade to cut off the bottom ridge of the grommet and will silicone it in the hole.
Is it a good idea to spray wd-40 or something like corrosion block into the transducer plugs prior to connecting?
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Old 04-16-2003, 08:24 PM
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Default Fishfinder installation ? Scout Dorado

WD-40 is good, but better would be electrical conductive grease. A small tube is all you need, and you can use it on ALL electrical contacts.
I had to replace the rear bulbs in my tow vehicle, and guess what was recommended? That grease eliminates oxidation and keeps water and dust out of the works. Boat supply store or Radio Shack has it.
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