312-8 loses power going uphill

[jimrogowski 0]

Thanks to all who have given suggestions!   Over the weekend I had a chance to do some further testing.   Pulling up on the clutch pedal did nothing, but taking a small wire brush to the big pulley attached to the  tranny seems to have done the trick.   With the tranny in Neutral...and the clutch out,   I used a small round wire brush on the pulley as it was spinning.   Cleaned the groove very well.  The tractor now jumps when I let out the clutch too fast!   I have this for sale...and now I feel like I'll be selling something that works correctly!  Thanks again.