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B256 Placement on unusual hull?

Old 04-15-2007, 01:37 PM
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Default B256 Placement on unusual hull?

I got a great deal on a leftover 1kw b256 transducer w/ hight speed fairing block awhile back but I have been hesitant to mount it. I can not decide if I should place it on the starbird side opposite the throught-hull fitting on the port, or should I mount that sucker right in the middle.



+ The middle would give me way easier access than the starbird side which may be outright impossible.
+ The middle would not be in-line with the prop.
- The middle would be more of grounding risk.



- The starbird side would be more of a forklift, trailer, and rack concern (boat lives in Hi/Dry)
- The starbird side would be more inline with the prop.
+ The starbird side may have less bubbles and turbulance.



Thanks for looking!

t_bare
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Old 04-15-2007, 06:33 PM
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Default Re: B256 Placement on unusual hull?

With twins you will probrally have to place it on the keel. If you place it on one or the other side of the Keel you stand a good chance of starving a motor of water for cooling. What kind of boat is it? What is on the keel now? Is there any way you can flush mount it in the keel of the boat? How good is your bilge access to do the mounting?Is the hull glass or aluminum? My B260 is mounted on the keel and is only exposed about 3/4", My last thruu hull ducer was mounted in the same place........Mark
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Old 04-15-2007, 07:08 PM
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Default Re: B256 Placement on unusual hull?

The boat is a Aquasport 250 Explorer, Fiberglass Hull. I have talked to a couple of good glass guys here in Tampa and no one wants to do a pocket install. There is just not enough access. Currently on the keel you see a p66 transom tri-ducer. Thanks for commenting!

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Old 04-15-2007, 07:50 PM
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Default RE: B256 Placement on unusual hull?

Don't seeany reason not to put it on the keel from a performance standpoinnt and it will make fitting that fairing block much easier.
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Old 04-16-2007, 08:41 AM
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Default Re: B256 Placement on unusual hull?

Anybody have an idea how deep (How Thick) I should make the fairing block if I mount it on keel to avoid bubbles? I was thinking 1 1/2" to 2", unfortunately you only get one try...

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Old 04-18-2007, 08:06 AM
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Default Re: B256 Placement on unusual hull?

I am getting ready to start cutting and drilling, any words of caution?

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Old 04-18-2007, 09:09 AM
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Default RE: B256 Placement on unusual hull?

The transducer mounting instructions should tell you the minimum thickness. I think mine was 1/4" but it wasn't the highspeed. After the drill bit clears the outside of the hull, put some masking tape over where the holesaw will cut and start in a little bit from the outside. The masking tape will keep the gelcoat from chipping. Good luck.
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Old 04-25-2007, 05:09 PM
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Default Re: B256 Placement on unusual hull?

I got it all mounted up and got to test it today. I am somewhat pleased but not blown away by its performance. It painted a great picture up to 27 mph after that I get "chopping" from the air under the hull. I'll see how it works later with a loaded boat, today I was alone with a 1/4 tank of gas and no gear.

If I got it to do again I would have cut the fairing block a little thicker.

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