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  1. Burgieman

    Tohatsu m50d - Dragging piston with spark & Fuel

    Ok so I thought an update would be helpful. After I replaced the CDI (as per a 30 year marine techs advice) and tested all electrical systems and timing adjustments and the lower carb jet to no avail, I had a mobile marine tech come by today. First he tested spark on all cylinders and it...
  2. Burgieman

    Tohatsu m50d - Dragging piston with spark & Fuel

    It was the only one I took off and it looked spotless. Main jet was clear. I didn’t view the other jet. I will remove again and view reeds on that carb too. I just don’t feel I will find much. It all seems so clean. The piston is getting fuel as the plug is damp compared to #1 & #2… I...
  3. Burgieman

    Tohatsu m50d - Dragging piston with spark & Fuel

    We’ll, update. New timing gun shows spark working on #3 coil. New CDI did not change anything. What else could it be? Components look clean. Motor is not corroded.
  4. Burgieman

    Tohatsu m50d - Dragging piston with spark & Fuel

    Thanks sea rider. I suppose your eluding to testing the stator. I will try that tomorrow. The multi meter with a DVA addition is not giving any logical readings when the + is connected to the output of the CDI to coils and the - is connected to a coil grounding terminal. So no luck getting...
  5. Burgieman

    Tohatsu m50d - Dragging piston with spark & Fuel

    Thanks Matt, I did do an in experienced visual flashlight look in there. Reeds seemed in tact. But could still be an issue... another tech mentioned the CDI possibly causing incorrect or inefficient spark. He suggested using a timing gun to confirm spark so I’ll do that shortly. one other...
  6. Burgieman

    Tohatsu m50d - Dragging piston with spark & Fuel

    Hello all, I have recently discovered my Tohatsu 50 two stroke is only running on the top two pistons. The third has no effect when I pull the coil from the plug. So far I have confirmed: 1) Spark is good. New plugs gapped. 2) swapped coils and there was no change to dead piston 3) sprayed...
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