Reply To: Johnson tn-28 power issues

[Don]

I haven’t had any experience with this model, but it sounded like it was running on two cylinders…You had the powerhead all apart, I’m assuming the pistons looked OK and weren’t scored and that the cylinders were in relatively good shape. It is a shame you didn’t find new rings while it was all apart, but I’m guessing the compression might come up a bit after some running. I agree with JH, I wouldn’t replace that powerhead, you would have noticed any big problems while you had it apart. I would certainly look into that carb and recheck spark at lower speeds. Did you have the carb apart, was it mucked up inside?