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  1. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    Tach on the boat, it’s accurate. She’s ran fine for two seasons I can feel her out good… this just popped up from one weekend to the next. She would plane out at about 4k and easily get up into the 5ks and now it’s bouncing off the rev limiter / SLOW mode
  2. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    hmm... I do not have access to a manual; im just searching for this engine model on the forums and finding other posts regarding it. I did see the Diode post, but I haven't checked that / am not sure what that component is yet
  3. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    WOT on this model is 5000-6000 RPM, and she regularly would hit those values until last weekend. 3500 RPM seemed in line with other posts ive seen, the tell tale engine bucking / shuddering (its very distinct). I am so positive it is SLOW mode although of course I can't know for sure.
  4. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    I’m I did all my original testing under load out on the water, but on this day (the video) I was at the marina with my uncle (former marina owner and lifelong boat expert) and another mechanic who moseyed over to watch… they both directed the neutral testing so I hope it’s alright. I would...
  5. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    Just fine forward and reverse. Will cruise no issue, just will not go above 3500 RPM suddenly and is entering SLOW mode. Below that I can cruise no issues and idles perfect
  6. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    @crabby_bob This model has SLOW. Compression is fine, check out my video its clearly going into SLOW. Hits 3.5k RPM and starts bouncing off the rev limiter or however the SLOW electronics works Yes, either first or second was my understanding. Engine model is E120TLCCA
  7. J

    1988 Evinrude 120 V4 -Suddenly going into SLOW Mode at WOT. Video included

    HERE is my Youtube video of the issue on my 1988 Evinrude 120 V4, with the VRO. Shes been a great motor, no issues the last two seasons until suddenly last weekend I cannot get on plane and my engine wouldn't go over 3.5k RPM or so. I posted to the Evinrude Facebook groups and got the usual...
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