Hi,
I have a problem periodically with my clutch in my 2003 Max II (23 hp Kohler). By times when I release the throttle the clutch remains engaged even though the engine is at an idle. The machine creeps forward and sometimes will stall. If I pull the sticks back and rev it a couple of times sometimes it will release. Also sometimes when the clutch is sticking and when I shut off you will hear it make a loud clunking sound as it releases. Upon restart after that clunking sound it is released. Everything looks good in there and revving it it appears to be working properly.

The belt I am using is a Gates I believe P/N 6314 and a cross for that is a Dayco HP3003. I am thinking perhaps the belt is sticking down in the clutch or not sliding to the top of the split pulley on the transmission input. Also when checking the clutch I saw very minor corrosion on the front pulley which I sanded with 200 grit emery cloth. I am wondering if closer to the shaft is corrosion causing the belt to stick.

Any troubleshooting suggestions out there?