@bahtah,
Bahtah is right that you should definitely change the receptacle. Since I'm sure the saw did not come with a 50 amp plug attached, how did you intend on plugging it into the 50 amp receptacle? If the saw comes with a 30 amp cord cap, replace the receptacle with that of a matching configuration (30 amp). I'm guessing it came with a 20 amp cord attached. I would use a 240v 20 amp receptacle and change the circuit breaker to a 2- pole 20 amp to get better over current protection more closely matching your 13 amp motor. You will need to pigtail the wire in a junction box (4 11/16) since the heavier gauge (probably #6) won't fit on the device, and in the panel.
Incidentally, plugging a 13 amp saw into one of the 50 amp circuits won't create a "problem". It's the opposite actually, that plugging your 50 amp loads into your 30 amp circuit breaker protected outlet is where the problem will be.