I see the rivets now, stronger than Z section but they were sure stingy with the rivets.
 

They're not Z channel. It's two angles riveted together.
There were only 4 rivets up to the red line.

I've only found one stringer that has some galvanic rot. Looks like they screwed a floor board down.
 

Is it the rivets that attach that Z channel to the bottom?
Boy, all the stringers look to be in great condition!

As I was cleaning the floor, I found these two stringers had the rivets broken that hold the two extrusions together. Same number of rivets sheared on each side. I wonder if that's a high stress area on the hull.
Probably prudent to add a rivet between the others. They're on 6" spacing.
 

The hull rivet seam needs new rivets. To get access to buck them, the rear seat needed removed. I drilled out the rivets that attached the flange to the hull. My drill bit wasn't long enough to reach the universal head rivets on the bottom flanges so I resorted to a 1/2" wood chisel to pop the heads off. They popped off easily.
The foam has a consistency of the type used to hold artificial flowers in an urn, hard and brittle. And of course, the obligatory mouse nest.
 

I was hoping to get the seat out for cleaning but not enough room. They must have dropped it in and slide it into place and then installed the front seat. Gives me room to clean the floor.
 

Some corrosion between the seat flange and the hull on the starboard side.
 
 

sgower wrote:

Terry, 
 I hope I didn't get your last drain plug...


 

 I saved one for the Ranger, it had two in it at one time. I turned a piece on the lathe to make a round flush patch for one of them. If the trailer will handle the venturi, I'll add it.

 

Terry, 

Nice find, We will have to get together and run our Runabouts side by side. I hope I didn't get your last drain plug...

I will be posting more pictures of mine. I enjoyed working on it and the pay off was worth it. These boats are alot if fun to drive.

Locomotion wrote:

Great find! 
Does it look like it had a rear dash from the factory. How about a rear seat back?
How about the serial numbers?

Ray, I do not believe there was a rear dash in 1946 on the Runabouts.

Like most other things, if not for the ignorance, the beer would be no problem

These boats would last for a thousand yrs ,,if not for the combination Sawzalls, Grinders, Ignorance and beer.