"I have a 1989 150 evinrude on
"I have a 1989 150 evinrude on a 20' sea ox w/a. Recently acquired . Going over the boat i found the warning horn to be no good(black potting also dry and cracked). Replaced with a new brp 3 wire horn, and after 5-6 key switch cycles, the horn went bad again. I...