i'm not for sure if this is where i should post this question but here it is. My fuel gauge only rises about an 1/8 of an inch when i turn on the ignition. I know i have roughly around a half tank of fuel. Being that the only thing related to the gauge is the sending unit , can any one tell me which one is the problem or how to troubleshoot it. I posted on the electronics forum with no response. My boat is a 2000 stratos 19ss extreme if info is needed. Any help , thanks.