Thanks, yes, in the case of my Speedster, they already modified the neutral switch and put a rat-tail switch on the side wall below the control. I already checked its operation and it works fine, it has two cables, one yellow with red (I suppose it's the limiter cable) and another black (ground). I already tried it in both positions (on and off) without result. This boat also had a jumper in the oil tank gauge connector since they removed it. I put in a float/level gauge and inverted it so that it would give me a full oil level signal, it didn't work either. I also "blocked" myself. Please, any suggestion is very helpful. Thanks to everyone.