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snivesatgt
08-28-2007, 10:05 AM
Everything has been taken off of the transom of my 88 prostar - originally to do a graphic on it, but we decided to simply recondition/wet sand/buff/wax all the gel coat to get it back to normal.

What do I need to do when replacing all the components on the transom. What type of sealant to put in w/ the threads of the swim platform support bracket?

The exhaust gasket screws?

Concerned since many of these things are under water when not moving.

Thanks,
Ben

TMCNo1
08-28-2007, 10:10 AM
Marine Grade, 3M Clear Silicone. I know someone has a part number?

east tx skier
08-28-2007, 10:13 AM
I think it is 3M Marine Sealant 5200. That's what I used on my pitot pickups.

snivesatgt
08-29-2007, 09:32 PM
Do I need to put anything around the part that slides into the exhaust? There is some overlap between the exhaust in the transom and the adaptor that slides into it. Do I need to coat it w/ the same sealant (assume not?? - but if not - with something??)

Thanks,
Ben

H20skeefreek
08-29-2007, 09:41 PM
You should not use clear silicone. And I wouldn't recommend 3M 5200, but 3M 4200. 5200 is non-removable. And when using 42 or 5200, they are both available in "FAST CURE". Get that, the cure time is 24 hours as opposed to 7 days.

snivesatgt
09-03-2007, 08:01 AM
I'm particularly worried about what to use for the holes that have the speedometer water pickup line. Should I use that same material for that?

Thanks
Ben

TMCNo1
09-03-2007, 08:23 AM
I'm particularly worried about what to use for the holes that have the speedometer water pickup line. Should I use that same material for that?

Thanks
Ben
Yes!................

bigmac
09-03-2007, 08:47 AM
You should not use clear silicone. And I wouldn't recommend 3M 5200, but 3M 4200. 5200 is non-removable. And when using 42 or 5200, they are both available in "FAST CURE". Get that, the cure time is 24 hours as opposed to 7 days.
I agree. That 5200 is a superior adhesive and that stuff is a major bugger to disassemble. 4200 is less so, but still no picnic. The advantage of those polyurethanes is adhesion in addition to sealing. Marine Grade silicone sealant will work well if a water-tight seal is all you're after.

West Marine catalogue.... (http://www.westmarine.com/webapp/wcs/stores/servlet/SiteSearchView?catalogId=10001&Ntx=mode+matchallpartial&keyword=sealant&Ntt=sealant&N=377+710&y=0&x=0&storeId=10001&Ntk=Primary+Search&ddkey=SiteSearch)