Reply To: What issues can cause surging?

Home › Forum › Ask A Member › What issues can cause surging? › Reply To: What issues can cause surging?

November 19, 2018 at 2:46 pm #153709
fisherman6
Participant

    US Member

    I have had crankcase leaks cause surging. I worked on a 4hp Evinrude that had a rhythmic surge at WOT and sometimes at lower speeds too. That one had a casting flaw in the crankcase. Once that was fixed the surge went away. Just thinking of possibilities. Look for any places under the cowl around the powerhead that may be getting dampened by fuel mix.
    -Ben

    OldJohnnyRude on YouTube