There is no search function in the ask a member forum, but if you are a member (not sure if “offline” means a member or not), then you can go to the “active member forum” bar when you hover over “members only” on the top of the screen. There is a search bar there, but not under the plain “ask a member” forum page, which can also be accessed via the members only forum page. I could not find the piston ring set you speak of, but all of those motors are a similar size to my knowledge, and possibly have the same bore. Don’t bother replacing the piston rings unless they are bad enough that the motor cannot function. If you do replace them, this forum may be helpful. I also linked piston rings from a site that is named “oldmercs”, which I assume is owned or operated by one of the members here, and probably has enough knowledge about these things in addition to the fact that the part numbers match up.
https://www.aomci.org/forums/topic/mercury-ke4-piston-ring/
https://jetes-wgurh.volusion.store/product_p/39-21665.htm
"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."
