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  1. B

    150hp Johnson fast strike dies after about 5 seconds

    I have a Johnson 150 fast strike. Recently I was having a problem where it wouldn’t get about about 3000 rpm while in the water. I took the head off and found that I had scored cylinders. I took it to a shop and got it bored out and then I rebuilt the motor with .020 oversized pistons since...
  2. B

    Johnson 150hp fast strike motor stalls while accelerating quickly

    that’s my bad, forgot I had taken a picture of the top cylinder too. Here is cylinder #3
  3. B

    Johnson 150hp fast strike motor stalls while accelerating quickly

  4. B

    Johnson 150hp fast strike motor stalls while accelerating quickly

  5. B

    Johnson 150hp fast strike motor stalls while accelerating quickly

    I finally got a chance to work on the boat again this morning, it’s been a little chaotic recently. I removed the cylinder head and the head looked fine, but the piston had a buildup of black stuff on it. The cylinder walls looked ok as well
  6. B

    Johnson 150hp fast strike motor stalls while accelerating quickly

    I have a 1993 Johnson fast strike motor, it ran fine at the beginning of the year last year, but later on I started to notice that if I accelerated quickly it would bog down and die. It would idle fine and if I accelerated quickly it ran just fine. Finally toward the end of the year it got to...
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