Hmmmm Some senders can be retracted from a separate fitting, some are integral with the fitting. The retractable ones have a threaded cap at the top that holds the sender into the fitting, (and usually a plug tethererd nearby) then a big nut further down that clamps the fitting to the hull. should be pretty obvious, sounds like yours is not retractable.. Hopefully the cable has a means of disconnect at the sender so you don't have to cut or de-rig the cable. Given that its leaking, I bet that if you can get the nut and plywood off, you will be able to shove or drift the sender out from above. Your process sounds painfully correct... fussy work. I guess its a question of the cost of a sensor vs cost of your time. For surgical work of that sort try an oscillating multi tool with a thin bimetal blade, and a thin sharp and heated putty knife for outside. (The wire sounds like a fantasy, esp. in the cold...) Would suggest something other than plywood as a backing plate, bed it in filled epoxy. The 33-2 is pretty flat where the senders are installed, so its not a tricky install, though the space you work in is really tight. If you use plywood make the hole a bit oversized and saturate the whole thing with unfilled epoxy before installation.
Dave . Message: 2 Date: Wed, 26 Oct 2016 15:24:34 +0000 From: [email protected] To: [email protected] Subject: Re: Stus-List Depthsounder Message-ID: <1357326899-1477495474-cardhu_decombobulator_blackberry.rim.net-1859115520-@b12.c1.bise6.blackberry> Content-Type: text/plain; charset="Windows-1252" Thanks for the tips and info Dave...you clearly know a lot more about this than I do! You are right, everything is plastic. As far as I understand it, no matter what I end up doing, I need to get the backing nut off, get the wet rotten plywood off, and get the sender out. Yes, I concur that I would like to start with clean fresh surfaces. My confusion is when you refer to a through hull fitting and the sender separately. I had thought that the sending unit was essentially the through hull fitting. My understanding of the process is: once I get the backing nut off and all of the plywood backing plate off, I would next need to go under the boat and slide some wire underneath the mushroom head fitting to cut any sealant. Then I need to go back inside and grip the sending unit (where it is not threaded) and try and rotate it to break it free of sealant. Then I would clean everything, make a new backing plate, and remount. Is all of this correct? Of course, if this doesn't work and I can't break things free without destroying them, then I suppose I just need to do whatever it takes to get everything out. Then buy a new sender with hopefully the same diameter. Again, is this correct? Thanks again, Mike Sent wirelessly from my BlackBerry device on the Bell network. Envoy? sans fil par mon terminal mobile BlackBerry sur le r?seau de Bell. _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
