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115/80 Evinrude

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Re: 115/80 Evinrude

Postby riverbent » Mon Sep 19, 2016 10:45 pm

Looking forward to seeing the results.
Wondering if the primer I used is actually the equivalent to the OEM ones? Had shipping concerns with the rest of the parts so went online and found this primer as the same thing not branded under OMC and grabbed it local.
Attachments
IMG_20160918_145914.jpg
18' Valco- 115/80 Evinrude (in the works)
20' Alicraft- 5.7 with 773 Hami (sold)
245 Sea Ray- 5.7 Bravo 2
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Re: 115/80 Evinrude

Postby handyandy » Wed Sep 21, 2016 9:10 am

Very curious myself as to the results of this sealant test as I plan to rebuild a 3 cyl omc which uses the same sealant for the block halves. This is very useful info to me, I'm great full that all this info is being shared as everything I've heard read about the block halves sealing properly is crucial.
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Re: 115/80 Evinrude

Postby NoProplem » Wed Sep 21, 2016 9:41 am

Just curious why the tape over the Loctite brand on the tube of sealer and can of primer?
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Re: 115/80 Evinrude

Postby riverbent » Wed Sep 21, 2016 8:41 pm

NoProplem wrote:Just curious why the tape over the Loctite brand on the tube of sealer and can of primer?

Picture was taken at disassembly and wasn't sure if the forum aloud possible negative comments on branded names. Had decided not to include it at the previous post but noticed differences from the OEM label. Thought I did my online research and followed the manual. Regardless, made some mistakes and sharing them so others may possibly gain from them.
Again, really appreciating all input.
18' Valco- 115/80 Evinrude (in the works)
20' Alicraft- 5.7 with 773 Hami (sold)
245 Sea Ray- 5.7 Bravo 2
riverbent
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Re: 115/80 Evinrude

Postby NoProplem » Wed Sep 21, 2016 8:52 pm

Fair enough, I was just curious...lol
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Re: 115/80 Evinrude

Postby MT sauger skiff » Wed Sep 21, 2016 9:08 pm

Both methods covered well but the bead seemed to be thicker visually than the dab. The sides sprayed with primed had the best adherence when split.
also of note, both bead and dab spread at least a 1/4"
dab side (with bead run in middle) top, bead side bottom
Attachments
test1dab.jpg
test1bead.jpg
1960 MT Roughneck with 150 hp Johnson jet
1860 CJ Roughneck with 150 hp E-TEC jet
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Re: 115/80 Evinrude

Postby MT sauger skiff » Wed Sep 21, 2016 9:27 pm

So ran second test with primer down middle (1" flat). Tried to keep amount similar then dabbed one plate, primer whole center plate both sides
dab 3rd pic, bead fourth pic
quick conclusions IMO
- coverage using both methods was good but dab seemed better because it wasn't as thick and spread better (more pressure and less hydraulic resistance to clamping pressure???).
- primer helped adhesion but since it's normally applied to only one side it's not much of a factor. Clean working surface just as good and as I said earlier, primarily serves as a curing agent.
- dabbing as effective as bead in sealing but since it appears to spread more, machined surfaces can mate closer which will help maintain the other machined block clearances.
- thought dab was better before, still believe it to be

.... should add that both will spread nearly 1/2". Believe the within 1/4" of bearings and seals is to prevent the sealer from inhibiting the bearings and seals from seating and allowing the crankcase halve to seat against the opposite sides of those items. In other words, even if a bearing is fully seated on the dowel, some sealer will work in below it. At the same time as the crankcase if squeezing the sealant it could work up into the seat and inhibit the crankcase from mating by riding on top of bearing(hope that makes sense). Believe that as long as the bead isn't excessively large, that 1/4" "from" is enough to allow contact of surfaces, excess to dump into crankcase (never cures, gets dissolved in fuel and burnt) and reduce migration into unwanted seating surfaces. Same thing with seal rings, but could lock crank if excessive and cured between ring and crank.
Attachments
test2a (2).jpg
test2a (1).jpg
test2dab.jpg
test2bead.jpg
1960 MT Roughneck with 150 hp Johnson jet
1860 CJ Roughneck with 150 hp E-TEC jet
MT sauger skiff
First Mate
 
Posts: 800
Joined: Thu Aug 23, 2012 7:26 pm
Location: Great Falls, Montana

Re: 115/80 Evinrude

Postby riverbent » Thu Sep 22, 2016 7:46 pm

Thanks for taking the time of doing these tests and posting your results. I somehow missed the part in the manual about only applying the primer to one half. Big oops! Wish they would have called it a cure and not primer. Guessing the sealant never really had a fair chance to spread out correctly. Am going to get it back together this weekend with better results I would think.
Sent you a pm MT.
18' Valco- 115/80 Evinrude (in the works)
20' Alicraft- 5.7 with 773 Hami (sold)
245 Sea Ray- 5.7 Bravo 2
riverbent
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Posts: 146
Joined: Mon Nov 10, 2014 9:41 pm
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Re: 115/80 Evinrude

Postby MT sauger skiff » Wed Aug 09, 2017 12:41 pm

From recent crossflow rebuild. An idea of the amount of sealer needed and the end result. Thought the dab was a little thick but went with it since previous rebuilder decided to clean halves with a disc...wasn't bad in the end.
Attachments
out.jpg
in 2.jpg
dabbed.jpg
1960 MT Roughneck with 150 hp Johnson jet
1860 CJ Roughneck with 150 hp E-TEC jet
MT sauger skiff
First Mate
 
Posts: 800
Joined: Thu Aug 23, 2012 7:26 pm
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