up date on maxwell t post 5/19. My 2002 Jonhson 150 hp engine runs at very high speed and spews out black smoke when it should be idleing. Ran perfect on another boat one day earlier. Changed nothing but ignition switch. Replaced old switch and still runs wild. 3,000 to 4,000 rpms. Throttle...
Installed new ignition switch in Johnson 2002 150 hp to match existing switch. Engine idles about 3,000
rpms and spews black smoke as if flooded. Is choke closed? Is it wired incorrect? Help. Thanks.