I've just taken delivery of an '02 240 Horizon. I love the boat, but the speedometer is very jumpy under 30 mph. Since this is the speed at which most water sports are, I'd like to know if there is anything that can be done either by the dealer or myself to correct this. I'd rather not swap the speedo with a different model that won't match. It is a separate gauge, not part of a gauge cluster. It has a pitot tube not a paddle wheel. Thanks in advance for the help.<br /><br />JJR