What is the diffence between a HRR2168VKA and a2169VKA?
The 8 or 9 before the VKA is called a K-number, and think of it like a version number. The 8 was discontinued and replaced with the 9. The 9 is the most current version of this model.
The 9 has a lot of changes from the 8. The 9 includes:
--Clip Director (flip a lever to change from Mulch <-> Bag)
--MicroCut Blades (better than older QuadaCut blades)
--Improved deck geometry for better mulching
--Different (cosmetic) fan cover
--Lots of engine changes, including updated carburetor, flywheel and flywheel brake, composite timing gear, improved air cleaner case & filter, updated ignition coil and decompressor parts...