Removed from Freshwater boat with Mercruiser Kiekahafer Marine Engine with Serial Number 2916033. Has four mounting holes as opposed to 6 for carburetor mounting. There appears to be a small crack that is pictured. I don’t think that it is actually leaking or even cracked on the water jacket. I would still recommend grinding out the crack and filling with JB WELD or similar product. I have seen this done for a lifetime fix. It may not even be cracked, but I am just pointing it out in case it is a crack. The 4th picture that is a close up attempts to show what I am talking about.