Goops and sealants…..?

[amuller]

Finally putting my ’62 5.5 Johnson together after dealing with the shock clutch thing.

There always seems to be a lot of contrary opinion about using sealers and gasket cements and anti-seizes. Curious what the experts on this list would say. Between the lower unit and the pump there is a bearing/seal plate part. With the surfaces clean and a new gasket, is there reason to use a sealant? If so what would you use? Likewise, on the faying surface of the pump housing? On the pump screws? On the gearcase to leg screws? Etc.

I tend to not like traditional gasket cements are they are messy and pretty much ensure that a subsequent disassembly will ruin the gasket and scraping it off will be a pain. TRV is not so adherent but is very slippery and can cause gaskets to extrude out of place. Advice?

Per advice here, I ordered some non-metallic "Jet-Lube marine" anti-seize for fasteners. In appearance and consistency it seems similar to some Oatey pipe thread compound I’ve been using for years on gas pipe and suchlike. It’s a pale yellow but the product bulletin (http://www.jetlube.com/pdf/Marine%20Gra … lletin.pdf) for it describes it as black. So slightly puzzled here and sent Jet-Lube a note. Any thoughts on this? Do normal torque values apply?

[frankr]

OK, you asked, so I’ll tell you. For most gaskets, I use OMC/BRP Gasket Sealer for the exact reason you mentioned, It isn’t so nasty to use. The exceptions would be carburetor and reed plate gaskets, and pre-coated head gaskets. For metal to metal such as gearcase skegs and under the pump plate, Scotchgrip 847. For screw threads where water or corrosion may come into effect, the OMC Gasket Sealant.

There, I said it, so now everybody can come up with their substitutes.

BTW, to coat gaskets, I keep an old magazine on hand. Open it up lay the gasket on a page and brush on the OMC Sealer. Flip the gasket over and brush on the other side. Peel it off and use it, and close the magazine and lay it aside till next time.

[gjonz]

I use 847 for almost everything.

Greg

[amuller]

OK, thanks.

Do I get this stuff from an OMC dealer?

Are there generic equivalents?

On the anti seize, company says it was reformulated 2 years ago……

[jerry-ahrens]

I do the same as Frank, use OMC gasket sealer. Or if you happen to have a Mercury marine dealer closer by, then ask for Quicksilver Perfect Seal. I believe it’s about the same. One can of either lasts me a year or two in my outboard repair shop.

[frankr]

Yeah, the Perfect seal is very similar. Probably easier to find, since Mercury dealers are far more plentiful

[chris-p]

What Frank says…..

I keep a can of OMC Gasket Sealing Compound on the bench at all times, beside the tube of 3M 847.

[amuller]

OK, I guess I know what to do. Thanks, all.

[PugetSoundBoater]

quote amuller:

OK, thanks.

Do I get this stuff from an OMC dealer?

Are there generic equivalents?

On the anti seize, company says it was reformulated 2 years ago……

My can of Jet Lube Marine Grade Anti Seize is black.I’m sure your new yellow stuff is just fine. I use it on below the water line lower unit bolts ,trailer wheel bolts ,etc, as i’m frequently boating in salt water.
Got a can of OMC Gasket Sealant Compound as recommended here, use it on gaskets and bolts,buy it at an OMC parts counter.
i use Form A Gasket 2 when i have a pitted gasket surface due to corrosion,or for surface irregularities
Just got Gasoila Thread Sealant with PTFE for threaded fuel connections ,compatible on Polyethylene gas tank threads

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson

[Anonymous]

A guy in to (formerly local) Mercury dealer parts department once said Permetex "High Tack" was as good as the Mercury and OMC gasket sealers

[Author]

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