2008 Evinrude E-TEC 55MFE Technical Manual, Page 34Get this manual
INSTALLATION AND PREDELIVERY OUTBOARD INSTALLATION
OUTBOARD INSTALLATION
Hull Preparation
Maximum Capacity WARNING
Do not overpower the boat by installing an outboard that exceeds the horsepower indicated on the boat's capacity plateOverpowering could result in loss of controlBefore installing outboard: Refer to the boat manufacturer's certification label for maximum horsepower rating Refer to ABYC Standards to determine the maximum horsepower capacity for boats without certification labeling
The stern brackets must contact the flat surface of the transomModify trim that prevents the stern brackets from resting against the transom surfaceDo not modify stern brackets
WARNING
DO NOT install an outboard on curved or irregular surfaceDoing so can wear, bind, and damage components, causing loss of control