fitting transducer
Submitted by black gen on Wed, 2012-04-04 07:58
i am just about to fit my new transducer for my furuno and i was wondering what screws i should be using..
it is going to be transom mounted on an aluminium boat....
do i use s/s 316 self tappers? i was under the impression that you need to put sikaflex in between the screws and the ally??
any help would be great as im not overly excited about electrolysis
thanks guys
Jess
wangler
Posts: 459
Date Joined: 26/04/08
Just make sure you
pre-drill the ali for the stainless self tappers, otherwise the heads will snap off, and yes use some sika behind the plate.
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Dougie
scottnofish
Posts: 964
Date Joined: 28/08/07
get some
duralac joint compound ,stops the corrosion between the ali and the stainless screws
strike_zone
Posts: 369
Date Joined: 09/09/10
tef gel
get some tef gel to put on the screws to help inhibit corrosion duralac is another one but tef gel seems to last a lot longer just remember this stuff only inhibits and will not work forever so you may want to reaply sometime down the track and a bit of sika around the head of the screw and she will be good
sea-kem
Posts: 3491
Date Joined: 30/11/09
Something else you need to
Something else you need to consider is the thickness of ali you are going through anything 5mm or more you would use fine thread self tappers less you use coarse thread.
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Georgejungle
Posts: 316
Date Joined: 25/03/09
Big arse ali pop rivets/. We
Big arse ali pop rivets/. We use them all the time you need lazy tongs to pop them though they are strong as and a sikiflex band in between. No corrosion probs then
till
Posts: 9326
Date Joined: 21/02/08
Most ali rivets still have
Most ali rivets still have either steel, or stainless steel heads inside, so you still have corrosion problems.
Just use duralac in any case.
Faulkner Family
Posts: 11816
Date Joined: 11/03/08
wouldnt you be better off
wouldnt you be better off fixing a piece of sealed marine ply to the hull so if you dont get it right the first time your hull wont look like a siev. just a thought.i know on my glass boat there were several holes drilled into the transom over the time and it does look messy with all the patches
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