That's a lot of motor for that saw. The saw can't use it.
That's a lot of motor for the 18ga wiring and the switch on that saw.
That would need the switch investigated, and the wires replaced.
(Yes, cords get overloaded, but these came from the factory that way. They won't start that motor cleanly).
I never thought I'd say it, but I'd get a motor from Harbor Freight before I got one from Vevor. Vevor has more cool machines than Harbor Freight does, but the sketchyness has Harbor Freight out sketched by a mile. And Vevor's motor pricing does not make them stand out in the price department in that category anyhow.
have you looked at Harbor Freight's motors? (I never thought I'd say that....).
57338 / 68288 looks pretty entertaining. One horse (that's what your saw came with), 120/240, reversible, 56 frame. Perfect for a "project motor". (Have you checked the shaft size yet?)
I thought they also had a half horse motor in that lineup, but I can't find it. I wouldn't rule that out either if you stumble on one. Only once in a blue moon would that hold you back any, and in low speed you'd never know the difference anyhow.....
No matter how you slice it though, this is one of the pains of owning "economical" tools for limited use. When something goes wrong, the motor costs half or two thirds of what the whole machine cost new. As does each of eight other individual parts of the machine. Been there, done that. I feel your pain no matter which way you go.