Hi Guys,<br /><br />I have a 91 evinrude 225. Apparantly I have an old OMC tacho. It used to work, but hasn't done very much lately. It will 'twitch' when you turn the key on, but that's it. <br /><br />I bought a manual, but there is nothing on the tacho (figures)...<br /><br />Can somebody...