I've got a 40 twin I'm working on. I've reringed it and was able to scrounge together a early m15A tillotson carb for it. It was missing the carb and gov linkage.
So I've put it back together, and runs well, but I have yet to figure out the governer settings. All my other twins are pre govenor, and don't have it.
When my throttle lever is "closed" that lets the gov arm rest towards the driver. When you "open" the throttle, it pushes the arm forward, looking like it limits the travel.
As it seemed to push forward to "open" the throttle, that is how I fabricated a gov arm to the carb. It is on a homemade bell crank with the rod at the bottom, so when the arm goes forward, the throttle on the carb opens
I've had it go full throttle almost immediately after opening the lever. I tried pushing the arm forward, then securing it to the link to keep the throttle closed, but the same thing happened. Ever tried to stop a moving twin, when you can't reach the mag stop?? It didn't have a carriage on it yet, just two wheels. It started and idled OK, so off I went, opened the lever a tad, and full tilt we went, till I pulled the test gas tank off of it and the carb ran dry.. I use Coleman gas for testing in case of leaks or other interesting issues.
Is this backwards, or how is the arm set up on yours? How is the gov link done, and what does what when the lever is opened?