Evinrude with two head gaskets

[Beno]

I picked up this little two horsepower Evinrude it’s a beautiful shape the guy said he couldn’t get it to run but he didn’t really know much about evinrudes and he told me the strangest thing…

He said that he put two head gaskets on to make sure it would really work.

I just looked at him and thought he must be joking no one would do such a thing and in my head I’m calculating the decrease in compression and the increase in the number of points of failure and just the general bad idea that that would be. ..

Then I looked close at the motor.  And sure enough . Two head gaskets (see pics)

But then I started thinking well maybe there’s something to this that I don’t understand?! so I guess I’m asking if anyone who’s ever heard of putting two head gaskets on to make sure a motor would run better.?

 

[billw]

Tell that guy to step AWAY from the wrenches….

Long live American manufacturing!

[Beno]

Ok I got it apart and out..  this is one strange head gasket.  Is it two gaskets packet together? Or is this just how they’re made? See pics

 

[Bob Wight]

Looks like he just stacked on gasket on top of the other and maybe used some sealer between them.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
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."

[Beno]

Solved

[Beno]

Ok. The rabbit hole gets deeper folks..

On the inside metal surface of the head someone roughed it up but roughed it up probably a little too much

I’ve never seen marks like this this deep on the inside of the head is this from the factory or is this just someone who just went crazy with the abrasive wheel???

[frankr]

We already know he was crazy.  But maybe he ground off so much he had to use two gaskets (?)

[Beno]

Okay now I understand why he was using two gaskets there’s a clearance issue between the piston and the head for some reason the Piston is hitting the head with a single gasket and it’s so bad that the fly you can hear it when you try to spin the motor it makes it terrible sound.

Someone has even tried filing the Piston away..

I’ve uploaded pictures where it’s hitting on both the top and bottom circled in red..

 

[Bob Wight]

I think that guy needs to surrender all of his tools.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
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."

[frankr]

I have a NOS head if you are interested.

[Author]

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