Water jacket core plug installation

B

Bombard Brent

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Joined
Feb 27, 2009
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21
My core plug finally fell out of my 1966 evinrude fastwin. It went from pumping a decent stream with a little water dribbling out from the lower pan, to having no stream and water gushing from under the head. Can anyone tell me how to replace this plug? do you just hammer it in and call it good?

Also, the water jacket has heavy deposits (salt?) and corrosion too. Any good solvents for cleaning this junk out?

Thanks

bb
 
bktheking

bktheking

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Jul 29, 2008
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5,057
Re: Water jacket core plug installation

Did this a month ago, find the same size plug- put in concave side out and hit it with a blunt punch or a smaller size bolt with a hammer. I'm not a salt expert, like in freshwater land, don't know!
 
F

F_R

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Jul 7, 2006
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28,195
Re: Water jacket core plug installation

bktheking said:
Did this a month ago, find the same size plug- put in concave side out and hit it with a blunt punch or a smaller size bolt with a hammer. I'm not a salt expert, like in freshwater land, don't know!
Click to expand...

A little confusion in terminology there--convex side goes out. "Bulge" or "dome" out that is. In other words, when you hammer on it, you flatten it out. It expands when flattened. Do not go beyond flat, or it will get loose again.
 
B

Bombard Brent

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Joined
Feb 27, 2009
Messages
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Re: Water jacket core plug installation

Thanks for the clarification F R. I didn't realize that it needed to be flattened out. :)
 
bktheking

bktheking

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Messages
5,057
Re: Water jacket core plug installation

F_R said:
A little confusion in terminology there--convex side goes out. "Bulge" or "dome" out that is. In other words, when you hammer on it, you flatten it out. It expands when flattened. Do not go beyond flat, or it will get loose again.
Click to expand...

Yup convex, my bad, concave would be the opposite. Thanks fr
 
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