I have a Husky 49 that is similar, but slightly larger engine. The 49 is near same as 2050 Jonsered. I've run 16 & 18 inch bars with .050 ga .325 Oregon 95VP semi-chisel chain and 17 & 18 inch bars with .058 ga .325 Woodland Pro 28RC chisel chain on this saw. My favorite set up is the 18 inch with 28RC chain in clean wood. The saw has plenty of speed and torque with the 18 inch.
I would also guess the 2045 to be okay in softwood with 18 inch/.325 and 16inch/.325 in hardwood.
Good luck with the saw.