Your not alone .Both of my Kubota's do the same thing and Ive tried slip plate and several other things with no luck.Even changed to a higher lift blade and that only helped a little,maybe someone will come up with something.
1954 WD45 eventually a compact diesel when I find 1 they're not so proud of.
Have not had this problem and I run fast enough to keep the governor kick'n pretty regularly. Sounds like a super tip that I'll file away for future reference.
fordman, My best solution was let the wife cut the yard I'll stick to the pasture /forums/images/graemlins/wink.gif
Now she gets to deal with cleaning up afterwards... Hey she even does the weed eating.... /forums/images/graemlins/smile.gif