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Old 11-13-2006, 09:31 PM
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Default Plastic or Bronze Thru-Hull

Changing around some electronics on the boat I just purchased and will be putting a new transducer in. Which thru hull is better and why? plastic or bronze?

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Old 11-13-2006, 09:44 PM
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Default RE: Plastic or Bronze Thru-Hull

Plastic thru-hull xducer?
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Old 11-13-2006, 09:51 PM
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Default Re: Plastic or Bronze Thru-Hull

Yeah, it's for a Garmin 2006C. I'd feel better and not even give it any thought if I knew it was Marelon. But I'm not sure what the transducer is made from. Since the boats got outboards, I like the idea of no extra metals underwater. By the way, I'm not asking this question based on the fact the plastic one is cheaper. Let's face it, it's for my boat so money is no object. I'd rather get the best stuff then eat, I mean isn't that how you buy boat stuff.
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Old 11-13-2006, 10:02 PM
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Default Re: Plastic or Bronze Thru-Hull

FWIW, my boat had a plastic thru-hull 'ducer when I bought it and I wasted no time replacing it with a bronze...
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Old 11-13-2006, 10:05 PM
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Default Re: Plastic or Bronze Thru-Hull

Why did you get rid of the plastic? Does the bronze work better? I just don't have a sweet hoist set up for my Grady like you do. Mine has to sit in the water.
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Old 11-16-2006, 05:06 PM
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Default Re: Plastic or Bronze Thru-Hull

I had an Apelco plastic thru hull transducer on one of my previous boats. It was a staright inboard kept in the water 24/7/365 from 1994 to 2003 except for yearly haulouts for bottom cleaning/paint.

No problems at all with the transducer. I do have a bronze Airmar tilted element through hull on my current boat which is kept on a lift.
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Old 11-16-2006, 07:26 PM
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Default Re: Plastic or Bronze Thru-Hull

Bronze are/were made originally for wooden hulls as the expansion of wood in water can crush plastic through hulls. Most airmars can be done in stainless too.
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Old 11-16-2006, 10:10 PM
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Default Re: Plastic or Bronze Thru-Hull

Doesn't matter. The element in both are the same if you look at the specs on Airmars website. I have a plastic LOW PROFILE thru hull, and love it. Nothing sticking out to drag on bottom in shallow water, nothing adding running drag, nothing to worry about when hauling since it doesn't stick out at all.

Lastly, no worries about electrolosis eating it away.... (although that is rare).
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Old 11-17-2006, 06:31 PM
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Default Re: Plastic or Bronze Thru-Hull

Quote:
Birdman - 11/16/2006 10:10 PM

Doesn't matter. The element in both are the same if you look at the specs on Airmars website. I have a plastic LOW PROFILE thru hull, and love it. Nothing sticking out to drag on bottom in shallow water, nothing adding running drag, nothing to worry about when hauling since it doesn't stick out at all.

Lastly, no worries about electrolosis eating it away.... (although that is rare).

How's the pick-up when running?? I thought the flush mount "lost bottom" like most transom mount do.
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Old 11-17-2006, 07:04 PM
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Default Re: Plastic or Bronze Thru-Hull

No. Why woudl that be? It doesn't create any drag or air pockets, just nice clean water under it. I hold bottom in 500' of water doing 50mph with a DS500x and a plastic low profile.

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Old 11-17-2006, 07:40 PM
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Default Re: Plastic or Bronze Thru-Hull

Bronze, nothing under the water line plastic.
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Old 11-17-2006, 08:29 PM
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Default Re: Plastic or Bronze Thru-Hull

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blueh20pc - 11/17/2006 7:40 PM

Bronze, nothing under the water line plastic.
The "nothing under the water line plastic" rule is a good one, but it does not inlude a plastic block that is stronger than any other part of your hull. It refers to hollow plastic thru hull fittings for water intakes and such. Personally, I take that a step further and say "NO PLASTIC thru hulls". But that omits a solid thru hull transducer which has virtually NO risk of failing.
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Old 11-17-2006, 08:42 PM
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Default Re: Plastic or Bronze Thru-Hull

I have never heard of a boat sinking from a plastic ducer. They work fine. At the same time, bronze only costs a little bit more (in boat $) so I would probably choose bronze.
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Old 11-17-2006, 09:19 PM
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Default Re: Plastic or Bronze Thru-Hull

Thanks for all the input. However, if the performance is the same, I would think plastic is the way to go. And that's not based on cost either. Just seems to me that they've gotten plastic to the point where it's probably more durable than most metals.
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Old 11-18-2006, 04:40 PM
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Default Re: Plastic or Bronze Thru-Hull

Bronze is more durable. It will not get brittle and crack like the plastic one might.
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Old 11-18-2006, 04:58 PM
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Default Re: Plastic or Bronze Thru-Hull

I'll take a hacksaw and cut through my bronze one, You take a hack saw and cut through your plastic one, and we'll see which one is more durable.
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