I am a new board member. I recently purchased a fish boat with a 1990 Evinrude 90 hp. I don't believe the thermostats have ever been replaced. I would like to replace them. The task appears daunting because of the close relationship of the thermostat housing to the lower engine cowling. Should this be a concern ? or am I getting worked up over nothing ? I feel very fortunate to have found this board. The things I have already learned are immeasurablle. Thanks for your help.