You don't mention how much oil it is going through..? Is it black smoke? Or oil smoke? If it's not going through a bunch of oil, I'd leave it alone.
If you do rebuild, you'll be happy with the 12HP. I push things harder than most... I've ran a 50C deck on a 10 HP tractor for at least one, maybe two seasons. Finally got a 44 and put on it. Still pulls it fine. The 50" was a little much in heavy grass.
You can do the 14/16 set up for a NF, but lets just go with you need to know how to set it up so it doesn't run hot. Plus, they are hard to get running right with the lighter flywheel. Stick with the 12.
|