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Gasket maker on trim motor housing? #14032249 06/15/21 01:29 AM
Joined: May 2021
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TexasTNT Offline OP
Green Horn
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So I got a new motor for my t/t. It's on a 90hp mariner and looks like the pic. When I put it all back together and started running it through to bleed it, it started leaking out one of the corners through the bolt. I tightened it down some more, but it kept coming. I made sure the gasket was in there correctly and didn't move.

Question is, can I use an automotive gasket maker along with the rubber seal to help this? I've done the gasket maker on trucks, but wasn't sure what the expert's opinion was on the t/t motor. [Linked Image]

Last edited by TexasTNT; 06/15/21 03:03 AM.
Re: Gasket maker on trim motor housing? [Re: TexasTNT] #14032544 06/15/21 12:55 PM
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Costa Plente Offline
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Not a expert but that's what I would do. I would not use a lot on it and I think that I would remove the gasket and put some under it, then put it back in and then put a small amount on top of it and tighten it down. Make sure you let the gasket material to set up prior to adding the fluid.

Re: Gasket maker on trim motor housing? [Re: TexasTNT] #14032765 06/15/21 04:26 PM
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boatman025 Offline
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no need oring gasket


Hughes Marine
3855 Osage Lane
Wylie ,Texas
Re: Gasket maker on trim motor housing? [Re: TexasTNT] #14033094 06/15/21 09:15 PM
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TexasTNT Offline OP
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Black RTV worked like a champ. I was a little worried when I heard air coming out going through the bleed cycle, but I didn't have the manual relief all the way in. New motor sounds so much better and I'm not embarrassed trimming it at the docks. LOL

Thanks for the info y'all!

Re: Gasket maker on trim motor housing? [Re: TexasTNT] #14033197 06/15/21 11:21 PM
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daman Offline
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You either going be left stranded with a trim motor that wonโ€™t trim up ..Or a burnt up trim motor from water getting in it ..no need for any kind of sealer

Re: Gasket maker on trim motor housing? [Re: TexasTNT] #14034263 06/16/21 08:16 PM
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rb7764 Offline
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TNT - daman is right. If you had to pookey an o-ring, something is wrong. O-ring is kinked, too small, too big, nicked, poor machining on actual part, etc.

Re: Gasket maker on trim motor housing? [Re: TexasTNT] #14035091 06/17/21 03:20 PM
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Droyhef Offline
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Housing could have small crack, fitting face damaged, bad o ring, could be trash on mating surfaces. Maybe it will work...but its the wrong application for both and it likely wont fail at an opportune time.


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