I just finished my 87 omc cobra and it was a breeze. Shouldn't take more than an hour, problebly less. I don't know if you have a new impellor but if you order one from anyone of the makers you will not get a gasket or o-ring with it unless you order the complete kit. I made a mistake when I ordered mine from Iboats and when they asked the size I did not know there were two different widths so I'm sending mine back today and getting the right one. By this I mean they ask you if you have the long housing or the short housing. Mine happened to be short.
Allons
It's gravy train.. One of the great things about having a cobra..
More like the ONLY thing great about having a Cobra.....