I replaced these modules on my 18.5 HP B&S V-Twin Intek. As with the other reviewer, I couldn't turn the engine off with the ignition switch. I used the fuel shutoff valve to stop the engine. Put back the original modules one by one and the engine could be stopped with only the originals. I even swapped and tried a few times but when this new module was used I couldn't turn the engine off with the ignition switch.