Just bought a 93 accord,speedo and tach not working. No blown fuses under dash or hood. Where do I look next?

If it not the fuse(#8 , 10A), you will probably need a new gauge cluster.

http://i198.photobucket.com/albums/a...boner/1-16.jpg

Agree with dustyboner. First, however, check the VSS connector for corrosion. This may help the speedometer. Second, check the BLU wire going to the Ignition Control Module. Ensure it's clean and tight. This drives the tachometer. Before replacing the gauges, clean connections on the printed circuit board (PCB).

Hopefully, you tested for power through each underdash fuse, by using a test light or multimeter.