The Hull Truth - Boating and Fishing Forum

Go Back   >
Search


Reply
 
Thread Tools Search this Thread
Old 05-08-2007, 08:14 AM   #1
Senior Member
Thread Starter
 
Join Date: Apr 2005
Location: New Jersey
Posts: 158
Default Airmar P66 Transom Mount Transducer - 5200?

I am mounting a P66 on a 2000 Aquasport Explorer 250 with a stepped transom.

The boat has twin outboards, and has a previsouly mounted transducer on the stepped hull (lower portion) between the starboard motor and starboard trim tab. (I'm leaving that one there)

I'm installing the new transducer in the center of the two outboards, just to the starboard of the drain plug. There is only about 5 inches of vertical transom surface, and not enough room to mount the bracket, and then install the transducer on it. Instead, I have to remove the cover and install the transducer to the bracket, and then get the screws in to the assembly.

I've already drilled the holes and had a tough time (thought I was going to break the screws off) and had to keep drilling a bit deeper and 1 drill bit size larger, but I got it done. I am ready to mount the assembly but I am not sure what sealant to use.

Knowing that I am not going to be able to remove the transducer from the boat, or make any adjustments, without pulling the screws out - What adhesive sealant would you use - so that I might be able to remove this from the hull someday? Would you go get special hardware (Maybe alan screws instead of the phillips head screws that came with the ducer)?


RackaRacka is offline   Reply With Quote
Old 05-08-2007, 08:24 AM   #2
Senior Member
 
Join Date: Dec 2006
Location:
Posts: 411
Default Re: Airmar P66 Transom Mount Transducer - 5200?

I would use 4200. Don't use 5200 - it's for items you NEVER want to come apart.
b_arrington is offline   Reply With Quote
Old 05-08-2007, 02:03 PM   #3
Senior Member
Thread Starter
 
Join Date: Apr 2005
Location: New Jersey
Posts: 158
Default Re: Airmar P66 Transom Mount Transducer - 5200?

I was unable to find 4200, so I bought 4000UV. Is this a suitable for this application?
RackaRacka is offline   Reply With Quote
Old 05-08-2007, 03:02 PM   #4
Senior Member
 
Join Date: Dec 2006
Location:
Posts: 411
Default Re: Airmar P66 Transom Mount Transducer - 5200?

Yes, according to the 3M product selector.

"Resistant to weathering, saltwater, and stresses caused by joint movement. Seals between mechanically fastened joints on wood, fiberglass, metal and most plastics above and below the waterline."

4000UV is often used where it will be visible, such as caulking a seam. It won't yellow and discolor from the UV rays in sunlight.
b_arrington is offline   Reply With Quote
Old 05-08-2007, 03:38 PM   #5
Senior MemberCaptains Club Member
 
Join Date: Nov 2001
Location: Niceville,FL
Posts: 587
Default RE: Airmar P66 Transom Mount Transducer - 5200?

Before you do it try this idea. Take a piece of white starboard and cut it down to a square or rectangular size that will just fit the area you have drilled. Take screws and put 4200 on them and screw the starboard into your drilled holes. Mount your Transducer to the starboard. This way you can move the ducer around if you need to or pull it and put a different one on without screwing into the transom. You use the starboard as the mounting point.

Try it. It works well and saves drilling anymore holes into the transom
Fishin Spot is offline   Reply With Quote
Old 05-09-2007, 08:52 PM   #6
Senior Member
 
Join Date: Jan 2006
Location: Tampa Florida
Posts: 129
Default RE: Airmar P66 Transom Mount Transducer - 5200?





I able to mount mine ok on the same boat, It was a little tricky but doable. If I remember right I had to put it together, mount it, then snap it down.

Good Luck,

t_bare
t_bare is offline   Reply With Quote
Old 05-09-2007, 09:37 PM   #7
Senior MemberCaptains Club Member
THT sponsor
 
Schmaltz~Herring's Avatar
 
Join Date: May 2002
Location: Cruising Tequesta On My 18' Skunkiekraft With Twin 75 Optimax's
Posts: 16,503
Default RE: Airmar P66 Transom Mount Transducer - 5200?

Schmaltz~Herring is offline   Reply With Quote
Old 05-16-2007, 07:28 PM   #8
Senior Member
Thread Starter
 
Join Date: Apr 2005
Location: New Jersey
Posts: 158
Default Re: Airmar P66 Transom Mount Transducer - 5200?

Thanks for the replies.

t_bare, that hull looks awesome without bottom paint! I am putting mine to the starboard of the drain plug, but basically an identical setup. I assume that you run twin outboards.

Do you have any cavitation issues due to the placement? Does it track bottom at speed? Were you concerned about trying to protect the transom from water intrusion from the inside where the screws pass thru to the inside?
RackaRacka is offline   Reply With Quote
Old 05-17-2007, 09:20 AM   #9
Senior Member
 
Join Date: Jan 2006
Location: Tampa Florida
Posts: 129
Default RE: Airmar P66 Transom Mount Transducer - 5200?

It does pretty good there, however air travels down the flat keel and foul the reading. You will find you need to trim the bow down to keep the bounce to a minimum. I have recently added a b256 with block about 20 inches in front of that ducer on the center line. It reads well up to about 25 mph then it too gets the air pockets. If I do it again, I will use Airmar's new 1kw tilted element thru-hull. I do have the twin 140 4 stroke John/Zukies and do not experience any problems with that install. I do think the ducer mounted further to the side would work better but this hull with twins will not allow it...


I did use 5200 on the screws going in. I do not remember all that well, but I don not think I was able to get the top center screw installed. Make sure you do not have a thru-hull fitting in front of where you intend to mount it. I have the intake for the live well/wash down pump just starboard of center. I added a scoop on mine you can see it in my first picture. As a result I mounted to the port...

I ran the wire up to the top of the transom, across to the starboard, then in to the hull up high above the water line.




I will warn you to be careful not to break the mounting screws going in I remember that part of drilling and fitting being a little touchy.



Good Luck,

t_bare
t_bare is offline   Reply With Quote
Old 05-17-2007, 09:29 AM   #10
Senior Member
 
Join Date: Jan 2006
Location: Tampa Florida
Posts: 129
Default Re: Airmar P66 Transom Mount Transducer - 5200?

I just reread your original post, Sorry I see you already know about the screw breakage concern... I used 5200 and would do again, when you use just touch like you do on screws it is not difficult to remove. It is when you use a lot on a flat surface that that stuff is so strong.

t_bare
t_bare 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 On
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 05:58 PM.


©2009 TheHullTruth.com

Powered by vBulletin® Version 3.9.3.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.