Re: [OMC-Boats] OMC-Boats Digest, Vol 55, Issue 3

Agree with Donahue. A quarter inch length not width crack can easily be
fixed for some time with JB Weld which is marvelous stuff - as long as the
crack is in a low pressure area of the water works. Good point about the
hose and the water pump. Sometimes I just run my boat in the driveway there
just to hear her run! TK

-----Original Message-----
From: omc-boats-request@...
Sent: Tuesday, March 20, 2012 12:00 PM
To: omc-boats@...
Subject: OMC-Boats Digest, Vol 55, Issue 3

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Today's Topics:

   1. Marine tex et al (Micah Donahue)

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Message: 1
Date: Mon, 19 Mar 2012 12:29:12 -0400
From: Micah Donahue <mdonahue@...>
To: omc-boats@...
Subject: [OMC-Boats] Marine tex et al
Message-ID: <D3D33983-0F71-45C5-88BA-B9DBE9BEACB8@...>
Content-Type: text/plain; charset="windows-1252"

I've seen and heard of people using JB Weld for same. Whichever "band aid"
material you try, clearly Tom's is very good advice re: not getting
stranded, and doing it right if the fix is serious.

But OTOH, what's the potential harm of trying a fix and then running it in a
tub of water in your driveway for hours, carefully watching the temps w/
gauges, alarms, non-contact IR guns, etc.? I guess the risk is that it would
get a lot hotter under load than you can test on land, but that's why I say
also run it in gear if you can.

I've found I can't trust hooking up a hose for tests like this because the
water pressure "helps" a bad cooling system work. (I failed to diagnose a
cracked impeller housing using a hose, thought I was okay, then overheated
and had to shut down on the lake.) Now when I test run on dry land, we use a
carefully rigged dumpster that we can fill w/ water and run in with wild
abandon. I think someone ought to make and sell collapsible poly versions of
this tub that are just the right shape to fit around the OD, and have splash
shields, a holder for the garden hose that fills it, a big drain fitting to
recycle the water to your lawn, etc...

YMMV.
-Micah

On Mar 19, 2012, at 12:00 PM, omc-boats-request@... wrote:

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> 1. Re: OMC-Boats Digest, Vol 55, Issue 1 (tklauber@...)
>
> From: <tklauber@...>
> Date: March 18, 2012 9:44:17 PM EDT
> To: <omc-boats@...>
> Subject: Re: [OMC-Boats] OMC-Boats Digest, Vol 55, Issue 1
>
>
> Not sure where the defect is that you want to repair. A water leak is not
> so bad as long as it doesn?t run hot and your bilge pump is working. YOU
> DO NOT WANT ANY WATER REFLUXING INTO THE ENGINE BY WAY OF THE EXHAUST.
> Sounds like you need to replace the exhaust manifolds. They do rust out
> with time. They can be descaled occasionally but will eventually need
> replacement. Replacements are everywhere - but very expensive and heavy
> and shipping adds to the expense. Not a hard repair. You might check the
> nipples on the front caps and replace them if corroded. The back elbows
> might also be toast if all else is shot. Lots of money but good for many
> more years if you take care of it and are in fresh water. Repairing a
> quarter inch crack might get you as far as the middle of the lake before
> all hell breaks loose. That is stretching it in my opinion Tom
>
> -----Original Message----- From: omc-boats-request@...
> Sent: Sunday, March 18, 2012 12:00 PM
> To: omc-boats@...
> Subject: OMC-Boats Digest, Vol 55, Issue 1
>
> Send OMC-Boats mailing list submissions to
> omc-boats@...
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> When replying, please edit your Subject line so it is more specific
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> Today's Topics:
>
> 1. Marine Tex (Dewey Clemmons)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 17 Mar 2012 22:48:38 -0400
> From: "Dewey Clemmons" <dewey410@...>
> To: <omc-boats@...>
> Subject: [OMC-Boats] Marine Tex
> Message-ID: <A499F371C7F242C4BFDEBC61552F606E@...>
> Content-Type: text/plain; charset="iso-8859-1"
>
> My outfit was bought new in 1967. It is a 16' Evinrude I/O outfit.
>
> I need to repair a small leak in the engine cooling manifold between the
> engine gas exhaust duct and the cooling water duct. I have used Marine Tex
> for small repairs in other applications and am aware of its good tensile
> and compression properties and am wondering whether it will stand up in
> the cooling manifold application. The hole areas might vary from narrow
> cracks up to one inch long up to voids in the wall 1/4 inch wide up to one
> inch long. The material could be applied up to about 1/4 inch thick.
>
> Thanks for any suggestions or related experiences.
>
> dewey clemmons
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Received on Tuesday, 20 March 2012