[geogrubb]

I have a IDC 580 Supreme, they are a workhorse built like a tank and are designed for use with a metal blade(8in 1in arbor). The spool and spool nut have left handed theads(FYI). Check the carb it is probably a Zama or Walbro and carb kits are available. I can't check mine it's down on the farm. Have a nice day. Geo

 

[geogrubb]

On my 580 and othe 2-cycles I use Chevron Techron fuel system cleaner, (don't waste your money on the cheap stuff) at about 1 part Techron to 4 parts fuel and let it run at idle for 20-30 minutes(don't rev it up or the carbon will come loose in chunks and screw things up) Techron is not recommended for 2-cycles, after it idles a while the nasty black junk will start dripping from the muffler, when finished remove the muffler and burn it out with a torch. The inside of the engine will be spotless. Have a nice day. Geo

 

[geogrubb]

Here is a diagrham of the 580; I don't know if it got here or not. Have a nice day. Geo

 

[geogrubb]

Try this link, then go down to idc580supreme
http://odref.com/pdf/Ryobi/