I've got a 93 Johnson 70 HP that was converted from VRO to a pre mix fuel pump. I started a replacement on the fuel pump as I found some fuel seepage coming from it when I primed the bulb and was running under powered with some un-throttle surges and thought I might have found the culprit with air getting in and inconsistent fuel pressure. Upon disassembly, I realized the fuel pump had been mounted to the VRO bracket and not tied into the engine mount directly. My question, how is the fuel pump actually pumping fuel? I thought the mechanical fuel pump had to be engaged by something. Or was this done incorrectly? Any insight, links, videos, or diagrams are much appreciated.