Well, things are going along swimmingly.
Snowblower starts and runs without issue. Just threw in a little gas and bumped the impeller to loosen it up. That's on CList.
Honda on the pressure washer started second pull and runs fine. Guy said he though the pump was trashed so I'll likely just pull the engine to have it around.
Rototiller is indeed a genuine Troy Bilt. 1968 Horse. The carb mounting flange got broke, most likely during loading, transport or unloading. Chineseum replacement on order. Governor linkage is bent/missing so I'll have to do some fiddling there, but otherwise it appears to be a solid machine. I'll be keeping that.
The 3416S tractor starts, runs and drives. Carb needs a little love, think the float is sticking. The "S" stands for shuttle shift and I actually kind of like it. 4 speed transmission and a lever on the side for Rev/Neutral/Fwd. Pick a gear, move the lever and off you go. The Fwd section appears to have a range of speeds as well. Haven't futzed with that yet. Drove it up to the garage, tomorrow's project is to power wash it, change the engine and transmission oil and grease it. Also need to check the charging system.
One of them, or possibly both, has a transmission filter so that'll get changed too.
The 7116 is more of a project. Needs tires, carb (I have 1 plus 2 more for parts) wiring cleaned up, front rim beads straightened. They're bearing type 8 inch rims vs. the usual 6 inch bushing type. Replacing them would be expensive if they're even out there.
All-in-all, I'm pleased with what I got for what I paid. Not a smoking deal by any stretch, but a fair price.