Well slim to none on the weedeaters. They generally have the fuel pump as part of the carburetor. But some larger lawn mower (such as riders) have fuel pumps that can be adapted to outboards with a bit of work and ingenuity. I have a Briggs & Stratton pump on a 12hp Gale outboard.
BUT---the question asked rebuild? By far the better route if it has a rebuildable pump. Not all are.
