Gasket Replacement

[JohnRude]

Old, but new to 50’s motors. Find myself having to deal with GASKETS. Two questions. Can one reuse gaskets? And, in my case, I ordered some new gaskets for a 54 Johnson 10 hp. Should I use gasket “goop” on the new gaskets as I install? I assume it’s a no-no for the head gasket…. but on the exhaust side??

[crosbyman]

if you are talking base gasket under the power head…. I never gooped one myself.

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JohnRude

[joecb]

Except for head gaskets, I find that making new gaskets from sheet stock is a rewarding and enjoyable part of the hobby. Thinking back to my childhood, I don’t recall that I had a part in my sister’s paper doll cutting sessions, but maybe so. Like a lot of other aspects of our hobby, there are a few tricks and tools needed to do the job, but nothing magical.

Joe B

[Bob Wight]

If you remove a powerhead or pull a cylinder head or exhaust cover,  I’ve always thought that if you went that far, you might as well install new gaskets.   I always use a gasket sealer on the powerhead base gasket and on exhaust cover gaskets but never use them on intake/reed plate or carburetor base gaskets.    The cylinder head gasket always seems open to discussion – some folks use sealers and others don’t.   Some head gaskets are even marked “use no sealer”.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[JohnRude]

Thanks for the tip. What “sheet stock” do you use? Do you use a gasket compound with your new cutouts?

[JohnRude]

Thanks Bob,
I have been warned off using any sealer on the head gasket And sealer (high temp) can’t hurt on the exhaust parts. Unfortunately I have to reuse the gasket between the reed plate and the power head. I got an new one for the other side but it seems like cheap paper. I thought gaskets were made from cork or rubber.

[JohnRude]

Thanks Mr. Crosby Man. I never sealed that exhaust housing to motor one either. What about the leaf plate? I have to reuse one there.

[crosbyman]

no expert myself…

but I suspect no operational issus would come up if   the gasket is installed   dry   and bolts are torqued to spec. 

On the down strokes the pressure build-up in the crankcase  is mostly, if not 100%, directed out the intake  then to the  outports  to flush burnt  fumes from the cylinders   while the leaf’s would be  pushed against the plates… very little pressure would make it out  the gasket surface.

Conversly,   on the upstrokes  (vacum to draw in fuel)  the leafs will open   and  very little if any air would sneak by the  leaf gasket surface.

 

if not used in excess  enough to block critical  passages  I do not suspect  a touch of sealer  would create problems so … go for it if you feel more confident

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[crosbyman]

uupdate… well I tried to install the PH on my CD  this morning  and got annoyed at lining up  PH on a bunch of holes   on gasket  on the base so….

 

I added a few dabs of  gasket maker siliocone … just a few …….and  having it dry for now….

 

gasket is all lined up 🙂   should be a piece of cake now  to install the PH  🙂

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[JohnRude]

Crosbyman, you mentioned in a post not long ago that you found a supplier for those Dash-107 O rings for the fuel connector in Oakville I believe. Grainger is out of stock in them. Can you help me with a source. I tried to PM you last night. Guess I don’t know how.

[Author]

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