So Husqvarna shows the 435 rated at 2.2hp and the 440 rated at 2.4hp. But I don't understand how that can possibly be correct. I've looked at the specs and the illustrated parts diagrams. Both saws have the same bore and stroke, and same part numbers for the piston, cylinder, crank, carburetor, and muffler. So how can they have different horsepower ratings?
Perhaps they just tune the carbs a little differently? I suppose it's possible that they set the 435 a little richer and the 440 a little leaner to achieve the slight difference in HP rating. I just received a used 435 and I can say for sure that both the H and L were set a little rich. But I have no idea if it left the factory like that or if the previous owner(s) adjusted it.
Or perhaps both saws really have 2.4hp and they just say the 435 has less to help differentiate the saws.
Perhaps they just tune the carbs a little differently? I suppose it's possible that they set the 435 a little richer and the 440 a little leaner to achieve the slight difference in HP rating. I just received a used 435 and I can say for sure that both the H and L were set a little rich. But I have no idea if it left the factory like that or if the previous owner(s) adjusted it.
Or perhaps both saws really have 2.4hp and they just say the 435 has less to help differentiate the saws.