" I bought a used boat with a
" I bought a used boat with a 1986 Mercury 115 on it. When the motor idles it reads 2000 rpms. At full throttle it pegs the tachometer at 8000 rpms. The tachometer is a three wire and on the back there is a setting with 1, 2 3 & 4. The arrow is pointed at 1. Is the tachometer bad or does it need to be adjusted? Does anyone have any suggestions? Thanks "
" I bought a used boat with a 1986 Mercury 115 on it. When the motor idles it reads 2000 rpms. At full throttle it pegs the tachometer at 8000 rpms. The tachometer is a three wire and on the back there is a setting with 1, 2 3 & 4. The arrow is pointed at 1. Is the tachometer bad or does it need to be adjusted? Does anyone have any suggestions? Thanks "