That welder has a 10% duty cycle, meaning that you can weld for 1 minute then have to stop for 10. If you're a new welder, this would be okay because you're going to stop after every weld to look at it and probably clean it up and clamp the next part of your project together.
Those of us who can weld, generally clamp the most to all of the project together then zap welds everywhere, flip it over and zap welds on the other side.
Just something to think about.
Also, with such a lightweight welder, you're more likely to get better quality welds on 16 ga steel using a .030 tip and .030 flux-core wire. The thinner wire has a tendency to make a smaller welding puddle but much quicker, which means with a slightly underpowered welder you can get nicer welds overall, to a point.
16 ga is about .06" thick, fairly thin stuff. For thicker stuff like 1/8" steel you might have to lay two beads, one on top of the other for full strength.
With welders, you get what you pay for. If you are going to be welding more than just one go-kart (i.e. other things), you might consider spending a little more and buying a "serious" used welder for the same money.
A Lincoln SP135 is a good choice... 135A 90% duty cycle and it does weld 1/4" plate just fine if you bevel where you're going to weld. AND it runs on a 120V 20A circuit, something typically found in or near a garage.
