I have a JD 2016 X354 with 42" Deep Deck. I purchased the mulch kit and also was given a set of blades for when I am bagging. Now I have the bag set up on and took the mulch blades off and replaced with the other set of blades. Truthfully they don't look that much different at all except the length of the cutting area. Blades are the same size.
I replaced the blades and Torres to 50 psi turned the 2 blades all the way around and nothing is hitting. Once I let the mower down I start the mower and kick in the blades something sounds like it's hitting in the very beginning. If the mulch kit is open or closed it doesn't matter, nothing hits when I spin by hand. Any ideas? Added a few pics with both blades shoeing.
Mulch blade M170642 black tape
Regular blade M170639 yellow tape