I put the mulching kit on my 2004 Lazer HP 48 inch deck about a month ago. The think does a nice job but when it get to dandelions it just takes the head of the stem and leaves the stem. Ive tried everything i can think of. I contacted Exmark and they told me to run the mower at a lower throttle. I think it made the situation even worse. Any one have any suggestions to how i can fix this problem. Also the blades are brand new as well. Thanks again for the help.