Assuming that your numbers are correct " 2690947-01" it should have a 22HP engine.
If your clutch is dead the Simplicity part # is 1687746YP (replaces 1717664)
CLUTCH (22HP Models Only)
You may want to check these guys out for a replacement.
http://xtremeope.com/simplicity-1687...FdgGgQodbkkHRw
Make sure on the engine, the 22 is the only one that uses this clutch, the other engines have a different part number per parts tree.