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Well, the complaints with 847/1000 sealer are surely valid, pretty tough to work with….The worst part is trying to remove it if the gearcase has to be disassembled again for some reason like failing a pressure test. Just wish the stuff was available in a smaller tube with a smaller opening, which might make controlling it during application a little easier. All that negative stuff being said, the stuff is an excellent sealer that can compensate for minor sealing surface imperfections, and is impervious to gasoline and most chemicals it will come in contact with.
I get frustrated when sealing up OMC clamshell gearcases is passed off as something easy, that most anyone can accomplish. True, most anyone can probably get one the these gearcases back together and somewhat operational, but it is very unlikely to be sealed up properly, and what good is that…. So, being “old school” and set in my ways/aka stubborn, I will continue to wrestle with the 847/1000 sealer. I would strongly caution against using alternative sealers on OMC crankcases that call for use of the 847/1000 sealer in conjunction with spaghetti seal also.