i have a 1989 evenrude 200 hp omc. the tach failed when i was attempting to start it. it was hard starting and when it finally fired it revved up before i could pull back on the throttle. tach went up then fell back and is now not working. it zeros out when ign is on but won't work otherwise.<br /> i think i might have a problem with the rectifier but can't seem to be able to locate it to test it. this is a 6 cylinder motor.<br /><br />any help would be appreciated.