The Hull Truth - Boating and Fishing Forum

Go Back   The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > The Boating Forum
Search

Notices

Random Quote: If we're going fishing for flying fish, shouldn;t we be in a plane instead of a boat?
Reply
 
Thread Tools Search this Thread
Old 09-22-2006, 11:55 PM
  #1    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Fairing Block installation

Who has installed a fairing block for a thru hull transducer in the past?
What product did you use for bedding the fairing block and transducer?
Any words of advice?
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
Old 09-23-2006, 07:13 AM
  #2    
Senior Member
 
Join Date: Jul 2004
Location: Gulf of Mexico,Louisiana
Posts: 6,271
Default Re: Fairing Block installation

What transducer you have?Most makers have paper work that come with the ducer on how to install them.If yours didn't,check out there web site for the info you need.As for as sealin,anytime you have anything under water,use 3m 5200.Just be careful of not getting it on the face of the ducer,you don't want to clean it with acetone.
prockvoan is offline   Reply With Quote
 
Old 09-23-2006, 09:54 AM
  #3    
Senior MemberCaptains Club Member
 
Join Date: Jun 2002
Location: S. FL
Posts: 292
Default Re: Fairing Block installation

if you need to match a deadrise angle, use a bandsaw with a tilt table. Especially important with the larger, high speed fairings. 5200 or 4200 are fine.
diver dave is offline   Reply With Quote
Old 09-23-2006, 12:47 PM
  #4    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Re: Fairing Block installation

The transducer is from Interphase ( TwinScope ) ~ forward reading sonar.
This ducer is a brute at 4.5" x 6.5" x 2.5". The fairing block is the blue part.





Yes I have the instructions which came with the fairing block and yes these are the instructions I will be using to mount the ducer/ fairing block.

My only concern when I read over the instructions was the part under the heading, "Checking for Leaks". If I use 3M 5200 to bed the ducer/ fairing block and by total bad luck I do have a leak....how the heck do I correct it without destroying a $1200 transducer or the hull????????

Now I do not have a problem in drilling a hole in the bottom of the boat and doing the job right, but that doesn't mean I shouldn't look at the possibilities of things going wrong. If I use 4200 to bed things then I have options, but what options do I have if I use 5200 and I have a leak? Goop the crap out of it?
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
Old 09-23-2006, 03:24 PM
  #5    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Re: Fairing Block installation

Bump - as a good day to do this type of work slips by.
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
Old 09-23-2006, 03:38 PM
  #6    
Senior MemberCaptains Club Member
 
Join Date: Jun 2002
Location: S. FL
Posts: 292
Default Re: Fairing Block installation

do a dry fit first, then slip the cables thru the hole, then 4200 the mating surface of the fairing. let dry for a few days. there will be no leaks.. hey, same old maytag dryer as mine.
diver dave is offline   Reply With Quote
Old 09-23-2006, 04:44 PM
  #7    
Senior MemberCaptains Club Member
 
Join Date: Jul 2005
Location: North Carolina
Posts: 337
Default Re: Fairing Block installation

quick question, does the fairing block have any effect on the performance of your boat (speed or control)??
shrug1013 is offline   Reply With Quote
Old 09-23-2006, 05:06 PM
  #8    
Senior MemberCaptains Club Member
 
Join Date: Jul 2002
Location: Shamong, NJ
Posts: 245
Default RE: Fairing Block installation

5200 fast cure would be ideal. Quicker to cure and not quite as strong. Any of them will work just fine.

Cut the block to match the deadrise AT THE POINT OF INSTALL (not the factory quoted transom number) using a tilting table band saw with a straight edge clamped on as a guide (thats why the block has a square flange). Test fit everything before caulk and leave the cables and blocks run through the hull but resting on the ground and off to the side. Put a heavy continuous bead around the stem of the ducer at the head. Slide the lower block into place and put another heavy bead around the stem at the fairing block. Install the unit into the hull and have a helper hold it in place. Put a heavy bead around the stem inside the hull and install the upper half of the block. Put one last bead around the stem and install the nut. The idea is to use the nut to draw everything together and force the caulk around the stem especially at the hull penetration. It is a good idea to bevel the edges of the hole in the fairing block at the cut to help capture the caulk. It will give kind of an O-ring effect when everything is dry. It will not leak.

Mike.
mpwitte is offline   Reply With Quote
Old 09-23-2006, 05:40 PM
  #9    
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: Redington Beach, FL
Posts: 362
Default RE: Fairing Block installation

I advise against 5200 quick dry (fast cure). Regular 5200 tends to penetrates all the wholes and gaps with a little pressure, and ultimately seals better. You need a band saw and a correct size angle jig to cut the block properly. Then dry test fit it and then apply a generous amount of sealer on both sides. Actually, if you take your time and use common sense this is a simple job. Ask for some ones help so you donít have to climb the boat and jump out two thousands times.
__________________
No advertising unless you are a sponsor
WishFish is offline   Reply With Quote
Old 09-23-2006, 05:44 PM
  #10    
djy
Senior MemberCaptains Club Member
 
Join Date: Dec 2003
Location: Babylon NY
Posts: 577
Send a message via ICQ to djy
Default RE: Fairing Block installation

all good advice but make sure you sand off any bottom paint for the foot print of the transducer and wipe it with acetone so that it's clean. same on the topside.Make sure the area where the transducer is going in the bilge is dry.and like they said do a dry run for fit first. seal it with 5200 or life caulk.
djy is offline   Reply With Quote
Old 09-23-2006, 05:59 PM
  #11    
Senior MemberCaptains Club Member
 
Join Date: Oct 2003
Location: Seattle, Wa
Posts: 1,270
Default Re: Fairing Block installation

Worst case scenario, it leaks, you use anti-bond and pry it off. But it won't leak.
thom
boatommy is offline   Reply With Quote
Old 09-23-2006, 07:28 PM
  #12    
Senior MemberCaptains Club Member
 
Join Date: Jul 2005
Location: Southeast Florida
Posts: 988
Default RE: Fairing Block installation

I would not fully tighten the nut/screws when you do the install with 5200. Tighten it to the point that you have a thin layer of 5200 ... like 1x-2x the thickness of a credit card. Wipe of any excess and let it dry a couple of days. After it is dry you can fully tighten it. The idea is to make a thin "gasket" of 5200, and this ensures you don't squeeze all the adhesive out of the joint.
cowdogs is offline   Reply With Quote
Old 09-23-2006, 08:02 PM
  #13    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Re: Fairing Block installation

Thanks Mike. I've already got a mock up wooden block made just to make sure my cut is spot on.....I've got the band saw. Your tips are pretty much what my instruction have indicated.

5200 it will be ........ thanks guys.

Hey Dave,

Right on man! Yah the old girl (Maytag) I guess would be approx. 16 - 17 yrs old now........still working like the day I bought it for the Misses. Good money well spent.
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
Old 09-23-2006, 08:08 PM
  #14    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Re: Fairing Block installation

Quote:
shrug1013 - 9/23/2006 5:44 PM

quick question, does the fairing block have any effect on the performance of your boat (speed or control)??
To answer your question........I don't know yet. I guess you're on the same page as me, I think I'm going to be mounting an offset keel.



Thanks guys.....all of your advice will be applied.
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
Old 09-23-2006, 08:13 PM
  #15    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Re: Fairing Block installation

What do you think of the idea of mounting this brute right on the keel? Mounting location will put the transducer approx. 4 1/2 - 5 ft forward of the prop......would this distance still give my prop bad water? Given the size of the transducer if I mounted it just off the side of the keel the same distance forward wouldn't I get bad water at the prop? If so, what's the difference between mounting the transducer offset or right on the keel?
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
Old 09-23-2006, 08:40 PM
  #16    
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: Redington Beach, FL
Posts: 362
Default Re: Fairing Block installation

Right on the keel, you take off a good chunk of performance. It will be knocked off the first time you rub your keel against shallows. Approximately one foot to the side you minimize this. Best place for the through hull transducer is midway from the center to the bow, or a place near that spot. You put that toward stern if you have no other choice. However at least four feet from the props.
__________________
No advertising unless you are a sponsor
WishFish is offline   Reply With Quote
Old 09-24-2006, 05:52 AM
  #17    
Senior Member
 
Join Date: Jul 2004
Location: Gulf of Mexico,Louisiana
Posts: 6,271
Default Re: Fairing Block installation

One other thing to do before putting that 5200 is to put duct tape or masking tape over were the transducer head is so not to get any of that 5200 on it.You don't want to put any cleaner or acetone on the ducer head.It eats the bedding plastic or scraches it up and the ducer will not work as good.Just tape over it and remove after installed and the 5200 is cured.
prockvoan is offline   Reply With Quote
Old 09-24-2006, 12:12 PM
  #18    
Senior Member
 
Join Date: Mar 2002
Location: Ocean Pines, MD
Posts: 892
Default Re: Fairing Block installation

My Furuno dealer uses 5200 to bed the fairling block/ducer after dry fitting the fairing block to the hull shape.
__________________
================================================== ==
A bad day fishing is always better than a good day at work.

Jim

23' GW Gulfstream "Get Reel"
WildeOne is offline   Reply With Quote
Old 09-24-2006, 06:22 PM
  #19    
Senior MemberCaptains Club Member
 
Join Date: Jul 2005
Location: North Carolina
Posts: 337
Default Re: Fairing Block installation

So for mounting, one foot off the center and about in the middle of the hull in lenght??? Is that right??
shrug1013 is offline   Reply With Quote
Old 09-24-2006, 07:34 PM
  #20    
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Posts: 22,772
Default Re: Fairing Block installation

Quote:
shrug1013 - 9/24/2006 7:22 PM

So for mounting, one foot off the center and about in the middle of the hull in length??? Is that right??
Yup that would be right. And with you having a center console boat you shouldn't have a problem doing that at all. Personally I'd say, "you luck dog you"..... ....Iíd have to cut open the floor just to explore.

You have to keep in mind, my transducer is HUGE compared to what is out on the market. Will I notice a performance change? Probably, but most likely no more then if the bottom of the boat had slim on it.....at least in my case thatís what I'm hoping.
__________________
<img src=http://www.thehulltruth.com/members/garett-albums-posting-temp-pics-picture69025-reconstruction.jpg border=0 alt= />
Garett is offline   Reply With Quote
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need a fairing block speedyjoe Marine Electronics Forum 2 03-17-2005 02:48 PM
Fairing Block? Snowwolfe Marine Electronics Forum 13 11-30-2004 09:10 PM
transducer/fairing block helpu2c Marine Electronics Forum 8 05-01-2003 06:00 PM
Fairing block Bogii Marine Electronics Forum 5 04-11-2003 07:19 AM
Airmar Fairing Block Roop Marine Electronics Forum 2 03-24-2003 09:08 AM

 



©2009 TheHullTruth.com

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.2.0