Re: Evinrude 1916 model D
I did answer this on the AOMCI board, but I'll post it here in case a non-member wants to read it.
After reviewing what I can see in your photos, it would appear that your motor is likely a later vintage Model A Evinrude with a Model D tank grafted onto it. There are several reasons that I say this;
1) It has a reversing lower unit which was not available on the Model D. It also looks to have a rotating tiller handle, again typical of the Model A reversing rowboat motor.
2) It looks to have a water-cooled muffler on it, but I can't see the manifold so I'm not sure which style (hot or wet) exhaust is actually on the motor
3) The tank mount has been altered, as the normal mounting method is to for the tank to have a bracket soldered onto it that simply sits down on the crankcase; the tank has threaded bosses on it for bolts that go through the crankcase flange and run into the tank. Your motor has metal pieces (adapters, if you will) in between the tank and the crankcase flange that should not be there for the simple reason that if it was the proper tank for that motor (or the tank had the proper bracket on it), then it would fit properly without the adapter arms.
4) Your motor appears to have the later 3-piece crankcase construction, with a cast iron mid-section and two bronze bearing ends (top & bottom) that are held in place by 6 bolts each; all of the Model D Evinrudes that I've seen so far were all 1915 motors and had the two-piece bronze crankcase held together by only five (5) screws, three of which are also the gas tank mounting bolts.
Based on the book data that says 1916 Model D motor numbers started at 66,000, I'd say that the ID plate on your motor falls into the 1915 category, but to be honest. I believe what you have there is a Model A evinrude of unverified vintage that has received a 1915 Model D tank transplant.
Of course, I can always be wrong, so perhaps more a more thorough collection of images from your motor will tell us about something that I'm not seeing.
Hope this helps.
Best,
T2