When changing from plug
to DST800 triducer with boat
something in the thru hull
valve broke loose and a plastic piece came into the boat
After this event we had water
seeping in from what seemed to be in the middle of the threads.
Lifted the boat out of the water today to make a check and the whole thru hull
This is an Airmar P17 with valve, the space of the valve mechanics makes the thickness of the material thinner.
If you have one inspect it imnediately.
I think I will be changing to a B17 bronze
fitting without valve now...