I have a 91 Caravelle bowrider with a 4.3L OMC Cobra. Usually, I must give it some gas to start the engine. However, now when I press the neutral button and give it gas, it is still registering as if it is in gear and thus stopping the ignition from cranking. After getting it running, the engine does in fact go into neutral when the button is pressed. Do I just replace the button on the shifter and does anyone have any tips on doing so? Is this a do it yourself job?