by JMM
(Iowa)
I have a 1999 Lund Pro Sport with a 90 hp Johnson motor. I hooked it up to the ear muffs and started it up for the first time this year and it idles very well. when you speed it up to 1500rpms all is good, but if you go over 1500, the tachometer goes to zero. I would like to know what is happening.