On my 82 20 cc in the forward fishbox is a thruhull drain fitting
In the box is a cap on the pipe and it looks like a collar to hold the fitting in
the hull
if unwanted to change this the fitting would go throught the hill and into the bildge then into the box there I see the fighting collar. Wold there be a collar inside the bildge against the hull between the hull and the box? If so how is thiss accessed ?