SEARAY245
New Member
- Oct 19, 2009
- 18
- Boat Info
- 2005 Sea Ray 280 ,Twin 4.3's With Alpha drives. C80 Raymarine with radar
- Engines
- Twin 4.3's Alpha one gen two drives
Hello everyone , Here is my problem I have a 2001 Sea Ray with a 5.7 EFI mercruiser. Boat starts, idles perfect around 750 , tops out great , around 4300 rpm's nice and smooth. But when I bring up to and only to 1000 rpm's run's rough to the point it will shake the boat. If I nudge up to say 1200 and further it nice and smooth again. Or if I go below the 1000 rpm to 900 and under it' smooth again. This will do this in gear or sitting at the dock in neautral . I have just replaced the wires ,plugs, dist cap and rotor, and a new coil but still the same problem. Could this be a sensor going like map , IAC, throttle positioner , I have no more IDEAS. Went today and made an appointment at our marina to have it put on there computer so I hope it show's something. Does anyone have any ideas what could be causing this? or maybe has had or seen this same problem somewhere else. Otherwise the boat runs great . Thank you