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  1. W

    Updated: 1986 4.3 OMC running rough

    I posted earlier that my 1986 Four Winns Horizon began running rough while on the lake. I have to admit that I was running wide open to try to get the boat out of the water quickly. I believed at this point the boat needed a tune up. While trying to install a new set of points and performing...
  2. W

    1986 OMC 4.3 running rough

    I own a 1986 Four Winns 170 Horizon with a 4.3 OMC. Tonight I noticed the boat starting to run rough. I was heading back from some fun on the lake. I had the boat running WOT and noticed that the speed began to drop. I backed off the throttle. The boat still had normal oil pressure and...
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