Search results

  1. J

    hi speed stumbling merc

    Problem is not getting fixed and very frustrating. Engine ran great at the beginning of the year(April). Then in early May the engine started to stumble when throttling up. I have a 2000, 150 efi Merc. It has seen 2 Merc dealers so far and a new stator, cdm's (6), throttle position indicator...
  2. J

    2000 merc 150 efi/stumbles at off idle speed

    Went back to Merc mechanic and after passing all computer tests he explained that now its "throwing parts at it". Well, the throttle position sensor was first, then plugs and tested on the dyno. Seemed OK. Took out today, same old problem. Starts easy, idles OK, Gets to 2000 RPM and then...
  3. J

    2000 merc 150 efi/misses through mid rpm's

    Motor ran perfectly, and suddenly decided to miss at hole shot. Does it intermitently, but most of the time. When the rpm's eventually kick in, the top end does not miss. If you gradually increase the rpm's the missing starts at about 2000 and goes away at about 4000. Very strange! I've...
Top