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  1. F

    Motor shake and won't rev up

    My DT65 -98 vibrates and won't rev up. Spark plugs looks normal. I cleaned the fuel filter. I suspect the CDI unit.. Video: Any thoughts?
  2. F

    Johnson 120hk -86 bogs down at 4500+ RPMs

    The engine runs fine up to 4000 RPMs but occasionally starts to bog down and up again at 4500 and above. Sometimes I can run in WOT for approx 1 minute w/o issues. This have been done to try and solve it: Changed the primer bulb. Different tank of gas. Rebuilt carbs and blew them with...
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    Johnson 120hk -86 Overheat at WOT

    The engine overheat at WOT, both banks go hot (confirmed with temp gun). My water pressure gauge maxes out at 30+PSI at RPM above 5000 so the impeller seem to work fine. I had overheat issue early in this season but I thought I got it solved permanently when I switched side of the diaphragms...
  4. F

    Johnson 120hk -86 Overheat at WOT

    The engine overheat at WOT, both banks go hot (confirmed with temp gun). My water pressure gauge maxes out at 30+PSI at RPM above 5000 so the impeller seem to work fine. I had overheat issue early in this season but I thought I got it solved permanently when I switched side of the diaphragms...
  5. F

    Johnson V4 120Hp -86 Bogs down/loses power

    I have been using my Johnson now for many trips this summer, it´s been running flawless until few days ago.. On the way home I cruised at 3000rpm for a while and when I started to throttle up it suddenly started hesitating and lost power, it newer reached 4000rpm and just boged down to even...
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