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Chiro,

When you said "Evinrude Rep" I'm sure you were describing a dealer employee and not a BRP Evinrude representative from the factory.

What is the model number on your 90 E-TEC? There are software updates depending on the year that improve runnability and have the capability to calibrate the throttle position sensor for better mid-range running in the 2000 rpm range. That also depends on your top rpm which is governed by your choice of propeller.

Give us all the info you can about your rig, model, serial number, mounting height, prop size, rpm, etc. and we'll be glad to help.