Mercury - Grease, 16 oz. Tub Assembly Lubrication 92-8M0071836. Overview. When you're putting an engine back together-whether it's a small two-stroke or a big four-stroke-you want something on those fresh parts before they ever turn over. This assembly grease is the kind of stuff most mechanics keep nearby because it hangs on metal, doesn't run, and gives the engine a fighting chance on that first startup. It's meant for those moments when everything is clean and dry, and you need a layer of pro