Amazon lists the blade as:
Maxpower 331376B Mower Blade for 22" Cut Recycler, 22 inches, Replaces Toro 104-8697-03, 108-9764-03
Engine RPM's seem fine. Has plenty of power. I'm kind of leaning to your point in that the stupid thing never bagged very well. I bought it used last year but this is...
I have a 22" recycler bagger mower. I've replaced the broken back baffle, put on a brand new high lift bagging blade, adjusted the cutting height, and switched out the bag. It still refuses to bag worth a crap. It fills up about 1/4 the way then stops. I can tell it's not pushing air like it...