I HAVE A 1987 225HP JOHNSON LOOPER, ON MY 22 FT CHRISCRAFT, THAT I USE FOR OFF SHORE FISHING.
MY PROBLEM IS THAT IT IS REVING UP TO 2000 RPM AND THEN IDLING BACK DOWN TO 850 RPM WITH THE THROTTLE IN THE IDLE POSITION. AS IT DOES THIS, IT WILL BACKFIRE THROUGH THE MIDDLE CARBURETOR ON THE PORT...
