Help with types of engines

[Habiak]

Hi
Does someone know what is the diffrence between X 4.6 and F. 4.6 engine?

 

[lokky]

There were K4.6 anf F4.6 engines made by different suppliers for the Savage. The later F4.6 is usually considered better having more low down torque, better carb. Try a search as old info is plenty.