What will the general affects be of leaving the low elevation prop on
while I am boating at 4500' elevation?

Thanks!


If your boat has been achieving the proper number of RPM at the two different
elevations due solely to your past practice of swapping out the props, it might
be "overpropped" at 4500 feet with the sea level unit. You will likely notice a
decrease in speed, and a tendency for the engine to run slightly hotter.