Hi Acerkid, did you solve the problem? I was puzzled when I found the same change to my SV150, instead of the expected blown flap and linkage the link went to a vertical arm that disappears inside the lower engine block. No idea where it goes then. My mower will only run fast if I move this linkage manually; if I set it to run fast using the slow running stop screw it runs but with no power, and struggles to cut. If this linkage has not become loose, why should you need to adjust it? I am going to see if the main jet in my carb is blocked, that would account for my lack of power I think.