I have a 2003 225HO E225FHLST I was wondering if there is an easy way to raise the idle speed. It idles about 600 RPM and throws a low voltage alarm if I hit the trim. My graph shows 9.5-10.0 volts when that happens. If I give it a little gas the voltage goes up like it should. I have a hot foot so could I adjust the throttle cable on it to raise the idle to 900 or so ?