Re: 1952 Johnson 25HP (RD-13) crank seal? Home › Forum › Ask A Member › 1952 Johnson 25HP (RD-13) crank seal? › Re: 1952 Johnson 25HP (RD-13) crank seal? david-bartlettReplies: 1204Topics: 97 June 9, 2018 at 3:15 am #77699 302540 is the correct part #. If you want, I have some Quad rings for these I can give you. I have several. PM me with your address and I will send them to you.