Re: [OMC-Boats] OMC-Boats Digest, Vol 17, Issue 9

From: JEFF DOOD <jdood@...>
Date: Thu, 11 Sep 2008 22:41:10 -0700

thanks for the reply - now i have my boat and it's up to me. so i am
more than ever desperate for whatever info i can get.

On Sep 11, 2008, at 3:06 PM, Thomas Klauber wrote:

> I see no reason why you can't make your own gasket - all you need is
> the
> proper material and a template such as the old gasket - it is not
> rocket
> science - you can buy sheets or rolls of any kind of gasket material
> at
> NAPA. You will have to determine what material to use and the proper
> thickness - the guys behind the NAPA counter usually can help or any
> oldtime
> mechanic.

ok - i can definitely handle making gaskets - no fears about that.
it's mainly the material and if there's some special marine material
and special marine reasons i need to use it, etc. if typical
automotive type gasket stuff will work (cork or cardboard or
whatever), then i can handle that. but if it needs to be asbestos
or some special super heat resistant material, i might be stuck.
i've just recently dealt with a lot of gasket issues on another
project (also fixing up a '78 van) and have learned that sometimes
they need to be pretty specific thicknesses and materials, as you said.

> I would not try to make a head gasket which is metal etc.

so if remove the heads, will the metal ones already in use likely
survive? everyone always talks about a "blown head gasket" and how
serious it can be. makes me not even want to breath on those
existing gaskets. but maybe i am being to paranoid. (?)

> I have
> made many gaskets. Use an Exacto Knife or other razor sharp knife
> and or
> scissors and I use can lids etc to trace larger holes and have a
> leather
> hole punch set to do the bolt holes.

gotcha. i am dying to tear into this last little problem asap.
just didn't want to get stuck in a corner after disassembling stuff.

> The Seloc manual suggests rodding the
> exhaust water logs as they scale up with rust over the years. Did
> they ever
> check those? Good luck! TK

yep - i rodded one, they rodded one. theirs was really bad -
almost closed. mine not too bad. both all clean now.

took her out for another test drive tonight.....just hoping that
somehow leaving it sitting for 2 weeks miraculous solved the
overheating issue. yeah right. didnt. but what fun it is to
take it out, have it start up, idle smooth, and go full
throttle............albeit for 30 secs at a time. my routine is
go full for about 30 seconds.....then slow way down and rush back to
the engine with my heat sensing gun and point it all over the
engine. take readings for a minute or so. repeat. did that
for about 15-20 minutes out on the river tonight. was being careful
not to go too long at full throttle.

  still the same deal, but more to add. right manifold reads
around 90. left around 150. water pump around 160. therm
housing around 160. but here's where it gets weird.........#1
cylinder about 210. and the #2 cylinder on the other side - GOT UP
TO 250 ON LAST RUN! so not only is it the #1 that appears to have
some blockage issue, it's also the one on the other side too. both
front cylinders. i point my gun at the intake manifold above
each. and then the bolt on the head right at each. that #2 bolt
read 250 more than once. it's actually getting hotter than the
other side. then i point it at the other cylinders and the temp
goes down to the 170 range. That 250 reading made me head back to
the dock. but maybe i am overreacting?

so many questions.

1) this may be stupid, but just to confirm, 250 is dangerously hot
- right? or is that normal for those front cylinders?

2) at what temp does severe damage happen - like a crack? i keep
thinking of all the metal / cast iron stuff that goes in a household
baking oven - griddles, broiler grates, cookie sheets, etc. and
that stuff withstands 500+ degrees. so when does a block reach it's
limit typically?

3) Is there a way to check and see if i have water flowing around
those front cylinders WITHOUT have to disamantle everything? can i
take off the thermostat thing and squirt water through there somehow?


> ----- Original Message -----
> From: <omc-boats-request@...>
> To: <omc-boats@...>
> Sent: Thursday, September 11, 2008 12:00 PM
> Subject: OMC-Boats Digest, Vol 17, Issue 9
>> Send OMC-Boats mailing list submissions to
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>> Today's Topics:
>> 1. intake manifold/head gaskets (JEFF DOOD)
>> 2. paint (000000000 kennedy construction)
>> ----------------------------------------------------------------------
>> Message: 1
>> Date: Wed, 10 Sep 2008 09:10:06 -0700
>> From: JEFF DOOD <jdood@...>
>> Subject: [OMC-Boats] intake manifold/head gaskets
>> To: "Evinrude & Johnson Boats of the 1960's and 70's"
>> <omc-boats@...>
>> Message-ID: <6753E974-6963-42D4-B149-7C4192E233D8@...>
>> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
>> the overheating issue is now narrowed way down. in fact, i have my
>> boat back in my shop now and am going to try and do stuff myself from
>> here on out. it's running pretty good, but still overheating in
>> one
>> little spot on the engine - right at the "1" stamp on the intake
>> manifold over the #1 cylinder. that spot consistantly reads 200-220
>> on the heat gun when testing out on the water. everywhere else
>> seems
>> to read normal temps.
>> so i have to embark on a little exploration surgery here and see if
>> there's some sort of blockage right there in the #1 cylinder
>> area. which means taking off the intake manifold.
>> which means a new gasket, right?
>> same with the cylinder heads?
>> any chance the existing gaskets can survive, if i am really careful?
>> the idea with both those gaskets is complete air and water
>> tightness, right?
>> so even a pin sized leak can be bad, right?
>> i have no problem buying gaskets, but surprise surprise - not seeming
>> to be readlly available. part of the problem is not knowing exactly
>> which year engine i have. boat, '64. engine - who knows. Buick
>> v-6 155 around '70 i'm told.
>> And, unless i am missing something, i can't know that the gaskets
>> i've ordered will fit (providing i can even find them), unless i
>> take
>> the intake manifold off - at which point i will have trashed my
>> existing gasket.
>> i don't want to get into a situation where i have the engine
>> disassembled and can't find gaskets.
>> Can those gaskets be custom made by hand as a backup last resort?
>> cork? ???? i can't find the blockage unless i get in there
>> and look.
>> thanks! jeff
>> ------------------------------
>> Message: 2
>> Date: Wed, 10 Sep 2008 12:48:57 -0700 (PDT)
>> From: 000000000 kennedy construction <halkenbuild@...>
>> Subject: [OMC-Boats] paint
>> To: omc-boats@...
>> Message-ID: <230261.4930.qm@...>
>> Content-Type: text/plain; charset="us-ascii"
>> does anyone have the awlgrip paint code for a blue-green 1965 17'
>> delux
>> omc
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Received on Friday, 12 September 2008

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