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Randy,
There are only 3 diaphragms used for the different pressure tanks.
Metal plunger, 4 gallon tank uses the rubberish gasket with the extra hole, that is the only gasket inside your tank.
I buy the gaskets without the hole for a $1 less and put the hole in myself
The cork gasket shown above for $5 is that gasket for your 4 and 6 gallon tank.
I see that pic of your tank, but do not see a pic of the gasket you reference.
Can you snap a pic of the part you reference 02572?Assembly can be a pain as the spring is somewhat stiff.. There is a small aluminum disc that you must not lose…lol
Show us the part your talking about.
Richard
http://www.richardsoutboardtools.com
classicomctools@gmail.com1 user thanked author for this post.
This particular 4-gallon pressure tank was made between 1954 and 1956. After looking closely at the pictures, yours is the 1954 model of the Evinrude Cruis-A-Day tank which is distinguished by the bolt on lobes and the threaded connection barbs.
The 1954 model also has a third round hole in the diaphragm that corresponds to a walled off chamber in the upper housing. In subsequent years, the outer wall of that chamber was removed, and the chamber is actually open to the rest of the tank. The third round hole was no longer needed, and probably never was needed.
The newer/old style 1955 and 1956 diaphragm with just two round holes, and nine small holes will work fine for this rebuild.
Here’s a picture of the later model upper housing where the chamber wall is removed. This is a 1957 or later tank with the plastic push button.
Here’s your 1954 upper housing with the closed chamber:
Improvise-Adapt-Overcome
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