Wellcraft270
09-19-2006, 02:11 PM
This one seems to have everyone stumped. 05 Polaris 500 Sportsman. Noticed in the spring the digital tach showing low numbers off and on - would run around 6000 which seemed normal but would then drop to around 3000 on the tach without change in engine speed. Over time this got worse. Now if I run wide open, the tach will actually start counting down backwards, once it hits 0, the battery light will start to flash. The headlights will flicker and it will lose power going from around 55 mph dropping down to around 40 and will hold there. Starts fine, seem to run fine at lower speeds. Happened off and on a few times in the spring. Very consistent now. Assumed a bad battery - replaced and exactly same symptoms. Checked connections I could get to. Revved it up in neutral in the shop and could see some flicker in the headlights so seems to be RPM related. Thoughts?