Specs on that generator list outlet 120/240 on a 50 amp breaker...doesnt really mean that much.
It also lists Running Watts of 8000 W
Running Amps work out then to 33.33 Amps (8000 divided by 240)
As the welder needs 47.5 Amps for optimum output capability, this generator will only provide 70% of the required amperage.
To get the recommended amperage a generator would need to have a running watts rating of 11,400. (240 x 47.5)at 240 volts.
Not a recommendation, but something like this would be closer to what your need.
https://www.homedepot.com/p/DUROMAX-...E&gclsrc=aw.ds