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I am looking at a 520 Ramjet, older version with the MEFI3. Does anybody know of any issues with the MEFI3 instead of the MEFI4. I heard I might have some idling issues? I hope somebody out there is running a MEFI3 that can give me some input on how well or bad the system runs. I am planning to install the motor in my 67RS.
 

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I am looking at a 520 Ramjet, older version with the MEFI3. Does anybody know of any issues with the MEFI3 instead of the MEFI4. I heard I might have some idling issues? I hope somebody out there is running a MEFI3 that can give me some input on how well or bad the system runs. I am planning to install the motor in my 67RS.
I have a mephi 3 in last year and had no issues, Arizona Speed and Marine can reflash your ecu if you need it retuned or you can do what i did and buy there tuning software w a new 4b mephi ecu and do all your own tuning.
 
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