Is there a way to plug speedo water passage in lower without threading and screwing a plug in. If not using I know it needs to be plugged. What will happen if not plugged? Any help would be great

If you cut the hose on the outside of the lower unit, inside of the helmet, it will just blow out a little water and not hurt anything.

I have a -2imco,drive spacer and a new teague xr just dont want to trash the shbang the first on the water

first time on the water that is

There should be a small hose on the leading edge of the drive just above the where the lower meets the upper, that could just be disconnected.