I have recently purchased a 1978 Venture. The boat runs great, but none of the gauges were working.<br /><br />I traced the hot line from the ignition switch to the temperature gauge. There it is jumpered to the Trim Gauge and then to the tachometer. However, there seems to be no hot wire jumpered to the speedometer. I know it measures with air through the hollow tube, but I would have expected it need some kind of power input. Is mine just unwired or will the gauge run without power?<br /><br />Thanks!<br /><br />Oh ... also, my tube seems to be stopped up. Shouldn't I be able to blow through it?
<br /><br />If it is stopped up, it won't work. I recently found this out myself while fixing mine.
