By the looks of things your attempt at rebalancing K2 has broke how steam engines work. You might want to not mess with that as those fixes are being handled on SE and K2 side. The stuff that was need to be added was the byproducts K2 added.
The steam engines are only producing 300kws out of 750kws and the boiler is showing consuming 20/s out of 50/s. This is when the engines are providing the most power(it's maximum).