Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-01-2014, 18:23   #1
Registered User

Join Date: May 2009
Location: Grenada
Boat: Shorebro,Royal 33 - Aloisius
Posts: 927
Anti fouling paint over a depth gauge transducer

When you paint with anti fowlant, do you cover the depth gauge transducer or leave it uncovered?
__________________

__________________
landonshaw is offline   Reply With Quote
Old 02-01-2014, 18:30   #2
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by landonshaw View Post
When you paint with anti fowlant, do you cover the depth gauge transducer or leave it uncovered?
Nah, I just take the feathers off and grill them crispy
__________________

__________________
s/v Jedi is offline   Reply With Quote
Old 02-01-2014, 18:58   #3
Registered User

Join Date: May 2009
Location: Grenada
Boat: Shorebro,Royal 33 - Aloisius
Posts: 927
Re: Anti fouling paint over a depth gauge transducer

I agree, but what for anti foulant?
__________________
landonshaw is offline   Reply With Quote
Old 02-01-2014, 19:42   #4
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,594
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by landonshaw View Post
When you paint with anti fowlant, do you cover the depth gauge transducer or leave it uncovered?
Do not paint the depth sounder transducer.
__________________
fstbttms is offline   Reply With Quote
Old 02-01-2014, 19:58   #5
Neo
Registered User
 
Neo's Avatar

Join Date: Dec 2009
Location: Salem, MA
Boat: Pearson 31
Posts: 535
Re: Anti fouling paint over a depth gauge transducer

They sell an antifouling paint designed for the plastic transducers. I think West Marine sells it. Comes in a little 4 ounce container with a brush under the cap.
__________________
Neo
Neo is offline   Reply With Quote
Old 03-01-2014, 00:10   #6
Senior Cruiser
 
Jim Cate's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 11,465
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by fstbttms View Post
Do not paint the depth sounder transducer.
I'm curious... why not? I've painted all of my transducers since I first had one in about 1978... didn't seem to hurt them, and did a fair job of keeping them clean. Heavy growth does reduce effectiveness IME, and usually not being where fstbttms works means that I have to clean them myself. OK in the tropics, not so OK here in Tassie!

Cheers,

Jim

PS The so called transducer antifouling is not very effective IME. I just use whatever paint I'm putting on the bottom.
__________________
Jim and Ann s/v Insatiable II , lying Port Cygnet, Tasmania once again
Jim Cate is online now   Reply With Quote
Old 03-01-2014, 02:06   #7
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Re: Anti fouling paint over a depth gauge transducer

The reason for not painting them is that the solvents in the paint may attack the materials that the transducer is made of.

I first paint it with transducer paint, then a second layer of regular anti-fouling paint.

In the tropics you easily get away without paint, as you can take a brush to clean transducers, prop etc. weekly while snorkeling. I also take the transducer out when not sailing, although that takes away the water temperature reading on the network.
__________________
s/v Jedi is offline   Reply With Quote
Old 03-01-2014, 02:43   #8
Senior Cruiser
 
Jim Cate's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 11,465
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by s/v Jedi View Post
The reason for not painting them is that the solvents in the paint may attack the materials that the transducer is made of.

I
Yep, that is what lots of folks keep telling me... but our current pair (Interphase sonar and Standard Horizon depth) have been thus treated for the past 11 years and show no degradation of surfaces or performance.

I guess they could fall apart next week, but I kinda doubt it!

Jim
__________________
Jim and Ann s/v Insatiable II , lying Port Cygnet, Tasmania once again
Jim Cate is online now   Reply With Quote
Old 03-01-2014, 03:28   #9
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by Jim Cate View Post
Yep, that is what lots of folks keep telling me... but our current pair (Interphase sonar and Standard Horizon depth) have been thus treated for the past 11 years and show no degradation of surfaces or performance.

I guess they could fall apart next week, but I kinda doubt it!

Jim
Yes, I imagine that most of not all transducers are resistant now, but I did have an old B&G transducer that developed crazy cracks without anything obvious causing that...
__________________
s/v Jedi is offline   Reply With Quote
Old 03-01-2014, 03:50   #10
Moderator
 
Pete7's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 8,570
Images: 14
Re: Anti fouling paint over a depth gauge transducer

Absolutely, just slap some paint on. If I didn't then in a month I would have an underwater eco system growing on it. Those trasnducers will work through 1/2" of GRP so a little paint isn't going to make much difference. the tricky one is the speed transducer which is easy to clog up with paint, or if you don't tube worms and barnacles grow freely on them. We use the blanking plug when the boat isn't in use to solve this.

Pete

Quote:
Originally Posted by Jim Cate View Post
I'm curious... why not? I've painted all of my transducers since I first had one in about 1978... didn't seem to hurt them, and did a fair job of keeping them clean. Heavy growth does reduce effectiveness IME, and usually not being where fstbttms works means that I have to clean them myself. OK in the tropics, not so OK here in Tassie!

Cheers,

Jim

PS The so called transducer antifouling is not very effective IME. I just use whatever paint I'm putting on the bottom.
__________________
Moody 31 - April Lass
Pete7 is offline   Reply With Quote
Old 03-01-2014, 03:59   #11
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: Anti fouling paint over a depth gauge transducer

It would be nice to find a definitive answer.

People seem convinced that terrible, or not a problem, with no middle ground. The concern is that some solvents may attack the plastic.

Wandering around boatyards most are painted with conventional antifouling paint without any obvious adverse effects.
__________________
noelex 77 is offline   Reply With Quote
Old 03-01-2014, 04:51   #12
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,062
Re: Anti fouling paint over a depth gauge transducer

Stupid question, but why thru hull transducers? Why not use one that shoots through the hull?
__________________
a64pilot is online now   Reply With Quote
Old 03-01-2014, 05:05   #13
Moderator
 
Pete7's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 8,570
Images: 14
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by a64pilot View Post
Stupid question, but why thru hull transducers? Why not use one that shoots through the hull?
Well for depth that is what the boat was built with 25 years ago so I replaced like for like, the best spot has 20mm of solid GRP which might be challenging for a through hull. So the cost effective answer was replace the old Stowe sender with a new Raymarine one.

Same for speed, fitted a new paddle wheel when the old ones became unreliable.
__________________
Moody 31 - April Lass
Pete7 is offline   Reply With Quote
Old 03-01-2014, 05:09   #14
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: Anti fouling paint over a depth gauge transducer

Quote:
Originally Posted by a64pilot View Post
Stupid question, but why thru hull transducers? Why not use one that shoots through the hull?
A transducer firing through the hull is often a good option. It removes the need to drill another hole, but this cannot be used on metal, wood or cored fibreglass.

Even on solid fibreglass it does slightly reduce the sensitivity and quality of the depth reading.
__________________
noelex 77 is offline   Reply With Quote
Old 03-01-2014, 05:23   #15
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,586
Images: 240
Re: Anti fouling paint over a depth gauge transducer

According to Airmar:

“Use water based anti-fouling paint only. Never use ketone-based paint, since ketones can attack many plastics possibly damaging the transducer. We recommend brands such as MDR, Woolsey, Pettit, and Sea Hawk.”

Airmar FAQ - What anti-fouling paint should I use on my transducer?
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Reply

Tags
anti fouling, depth, paint

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:08.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.