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Mercruiser Question

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malibu205

New member
"Greetings,
A senior mercruis

"Greetings,
A senior mercruiser member referred me to this group. My neighbor has a Mer.Cru. 6.4 in a 30 ft. Maxum. Its nearly new and tends to backfire at or over 3000 rpm. He had an updated ECM installed and was wondering if the timing is off or , belt stretch? Does the ECM control the mixture and could it be running lean?

Thanks for your thoughts...Ralf -"
 
Yes ECM control most of the en

Yes ECM control most of the engines systems. Is this a Horizon engine?
 
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