I don't have any first-hand experience with the 90-HP and the Touch Troll switches, so I am not a good resource for your inquiry.
From what I can find, a dash-mount TROLL TOUCH CONTROL Switch Kit - P/N 768017 can be installed for 90-HP E-TEC engines beginning with models "AF". This is mentioned in the installation instructions. You can obtain the instructions fromhttp://www.dealerport.com/dealerport/in ... screen.pdf
E-TEC engines no longer use model year designators. The engine production epoch is identified in the full model number. For example:
would presumably be a model to which the a TROLL switch can be fitted, based on the instructions mentioned above. However, there may be a further concern regarding an engine that was not using tiller steering and uses remote controls. This is discussed athttps://www.etecownersgroup.com/post/da ... 17-9325006
and a very knowledgeable gentleman advises:
Any attempt to install the Touch Troll Kit #768017 on a remote configured engine would be ill advised.
I recommend you review this information with your dealer before committing to the purchase, if this feature is to be mandatory for your proper use of the engine. I am not a dealer, and I don't have access to all the information available to a dealer.
I don't know if the part you mentioned, 0766282, overcomes any problem related to remote controls. Apparently the length of the wiring being extended was part of the concern about using the Touch Troll Kit #768017.