Tachometer Troubles

[Whitedog]

Just took delivery of my new Nautic Star 1800 w/ 90 hp Yamaha. Trying to break it in according to the manual and the tach is looney. According to the tach I idle @2200rpm and WOT is off the scale way past 7000. I know the motor is not turning anywhere these numbers. It is a Faria Tach, any suggestions?

 

[bossee]

Re: Tachometer Troubles

Hi,<br />It is usually a selector switch at the back on a tachometer where the number of poles is set.<br />12 alternator poles I belive for Yamaha 90 hp 2-strokes.<br />On Yamaha 90 hp 4-strokes it should be the same.<br /><br />You can visit Faria instrument homepage and chek a tachometer installation guide if you want.<br /><br /> Link