I have a4 year old Honda hrr216 that I bought at home depot 4 years ago. I recently started doing lawn and garden work. The mower is not putting any grass into the bag. It all goes out the front near the wheels or just stays on the ground. I changed blades and the chute is not plugged that I can see. If the grass is more than a few inches deep I can't even take half a deck without it stalling. Then once it is all cut I have to go over it two or three more times to pick up most the grass. Even after that it won't pick it all up. Anybody have any ideas why this may be happening?