Teflon sleeve for shaftlines of boats class Eco and eco Mini.
Oddly enough, this seemingly tiny detail is very important.
Or rather, its state is of great importance.
If the sleeve is worn out and has even a microscopic backlash, (a gap) with a propeller shaft, the shaft in such bushing begins to rumble, increases the consumption of the battery;
And most importantly: through such a non-dense connection penetrates the water inside the boat!!!
And, do not forged it: timely replacement of this tiny detail!