The procedure for changing from one throttle control to another with the Evinrude E-TEC G2 does not vary depending on the sea state.
In order to switch the throttle control to the ICON II EST throttle lever from a foot pedal throttle, you typically would have an ICON Color Touch Screen control. For more information on the ICON 7.0 CTS display and smaller models, see
Evinrude ICON Touch 7.0 CTS Displayhttp://continuouswave.com/forum/viewtopic.php?f=10&t=2762If your dealer did not furnish you with printed copies of the user-guide for your E-TEC G2 engine and its associated instrumentation, you can download a PDF copy online from Evinrude. For example, for the ICON Touch 7.0 CTS instrument, see
http://www.operatorsguides.brp.com/OperatorsGuidesAttachments/OwnersManuals_EJ/attach/Accessories/356596_EN.pdfFor other user guides, visit
http://www.operatorsguides.brp.com/and select the guide you need for download.