TS3650 vibration

[Pops]

I just bought a used TS3650. The motor vibrates some - even with the belt off and under no load. Is this normal? If not, what could be causing it and what can I do about it? The bearings seem in good shape, the shaft is straight, no sawdust or any other debris in it. The saw works fine other than for the small amount of vibration (more than I would expect from an electric motor). Any help is appreciated.

Thanks
Jim.

[Pops]

I'll repost over in woodworking.