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? chris-pReplies: 2456Topics: 153 June 9, 2018 at 1:20 am #77688 Check for bearing wear. Try to move your flywheel fore and aft. Perhaps top bearing is shot, causing seal failure, and rubbing of the recoil. Hopefully not.