1957 fd-11 johnson lower keeps leaking from center screw hole

[stwaller]

I have a 1957 fd-11 johnson lower keeps leaking from center screw hole. It looks as if the screw hole area isn't flat and I can't get anything small enough in there to try and flatten it. Has anyone ever used an o ring around the screw?

 

[Crosbyman]

may as well be more specific... any pictures. ?? tried a few layers of teflon tape or gasket sealer ??

 

[stwaller]

may as well be more specific... any pictures. ?? tried a few layers of teflon tape or gasket sealer ??

I tried gasket sealer on the screw treads and a good amount on the under side of the crew head. Let it sit over night and when I did a pressure test, it was leaking from the middle screw.

 

[Crosbyman]

strange problem.... try some gasket goo then place a flat washer over the goo then install the bolt and nylon washer over the flat washer which will provide a flat surface easier to seal.

hopefully you did try the standard marine gradenylon washer under the bolt head.

 

[racerone]

The surface needs to be clean and true to seal.----Visit your local machine shop and have them use an end mill to fix this.

 

[ebarnes169]

The surface needs to be clean and true to seal.----Visit your local machine shop and have them use an end mill to fix this.

I’m new to this forum and I had a question for you. I’ve seen in past threads you have a lot of knowledge on the electramatic shift motors. I am working on one for a friend and it will shift into forward only once. It will shift to reverse every time but only forward one time then tries to blow a fuse. Is there a way to contact you directly as to not steal this thread ?

 

[Crosbyman]

as you indicated best to start your own topic... the small envleoppe on top right allows personnal messages to be exchanged between users