Chased out the issues with the first 2100 finally tonight, PTO crank seal and the cylinder came loose! I'm going to do some careful checking on the cylinder screw holes. Not sure why they would have backed off. Maybe the aftermarket gasket squeezed that much after it ran? Should have compressed enough when it was torqued down you'd think.
Pressure test said the PTO seal was bad too, so it's getting done.
Brewz, I never noticed you had a half wrap on that 2101, I like it a lot. I'm finding the full wrap bars move on the lower mount and are hard on bolt holes.
The other 2100 is running very well. I put 2.5 gallons of fuel through it last weekend and milled a pile of spruce with it.