GEM43
Active member
My Airmar through hull depth sounder has died. How best to extract it from the hull? No doubt it is sealed in with Sika or similar. Is there a technique or is it brute force?
Removing a through hull fitting
- Thread starter GEM43
- Start date
Sandy
Well-known member
On mine I just unscrew the top fitting and pull the depth sounder out of the through hull and replace it with a blanking thingi.
GEM43
Active member
Interesting, didn't know that was possible, maybe mine is like that too. Thanks.
lustyd
Well-known member
Usually only the ones combined with speed, the depth only usually just glue in. For these, unscrew the ring inside the hull and stand on it while praying the new fitting is the same diameter.
Depending on age of boat and whether you’re Raymarine it might be challenging to get a direct replacement that works with the kit.
Depending on age of boat and whether you’re Raymarine it might be challenging to get a direct replacement that works with the kit.
vyv_cox
Well-known member
It is not clear exactly what you are asking. A depth sounder is usually sealed into the hull, e.g. with Sikaflex. This can only be removed ashore. A dual Airmar with speed and depth can be withdrawn from its housing afloat, replaced with a blank allowing a change of unit. Some depth sounders may do the same, not sure.
GEM43
Active member
I believe that the depth sounder in my boat is sealed in to the hull, I intend replacing it when next ashore. I am asking specifically as to how the currently installed unit is removed.
Porthandbuoy
Well-known member
I have two duff depth transducers glassed into the hull with fairing blocks. I plan to remove them by means of a multi-tool cutter and hole saw. Using a file make the holes into diablos and fill them inside and out with increasing diameters of chopped strand mat and epoxy. Done the job before on a previous yacht no problem. Helps to have a '70s hull circa 1" thick.