99% of all mowers that re sold re equipped with a 2-1 blade this is designed to do one thing and one things only; move clipping out from under the deck. This means either discharging or bagging, but either way these medium to high lift blades are all about utilizing the discharge chute to do just that, discharge. True mulching blades create less lift and are designed to hold the blades under a deck so that they can be recut and pushed back down into the turf, rather than to be pushed out the side. Mulching is a tricky game to play as it only goes well when all variables are just right; grass height, moisture in turf, mowing speed, cutting height, etc.. But, if done right and with the proper blade AND deck configuration it can work very well. Mix and match different setups and results will vary, typically not in your favor. If you must mulch, your best bet would be to purchase the OEM mulch kit and now as frequently as you can. The results should be acceptable. So long as your mulch kit does not completely isolate each blade in its own chamber, you can always remove just the plate with the mulching blades still on for a little side discharge action if the grass is a bit longer but you will still have to slow it down a bit as the mulching blades do not process clipping as efficiently because of the reduced airflow.