Recent content by Cccoachd

  1. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    I agree. I have had issues since the swap 14 years ago. Sometimes the motor ran fine others times it didn't. Never had to be towed in but sometimes when on plane it would just shut down. It would start up again but might happen 3-4 times before running down the lake. Very frustrating. Was...
  2. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    Nobody told me. It's just what happened when the power heads were switched out (or so it seems). My mechanic noticed the ECU recognized the old motor NOT the new one. So for sure that wasn't swapped out.
  3. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    Question is will a "new" ECU t match the EFI solve the problem...?
  4. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    I thought it was the whole powerhead but now that I know the ECU doesn't recognize the new motor I'm beginning to wonder.🤔
  5. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    I was told they are not the same. And gauging from the constant issues I've had I'm guessing that is the problemZBut even changing out the computer is iffy from what I understand
  6. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    I'm not sure being it's such an old model but I was led to believe the whole computer unit would need to be replaced. And even then not sure if it would solve issues
  7. C

    Issues with a 2003 225 EFI power head that replaced a 2001 225 Optimax.

    14 years ago my 2001 225 Mercury Optimax blew up. I replaced the power head with a 2003 225 EFI power head. Lately (last 7 years or so) I have been having issues with rough idling to the point of shutting down, and losing up to 2 cylanders when trying to get on plane. My mechanic noticed that...
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