No way that generator will start a sump pump. It'll power an angle grinder, corded drill, droplight, etc. But for heavier loads like sump pump, circular saw, etc. - forget about it.
I picked up what look like a brand new "$129" HF compressor discarded roadside on trash day. Discovered a bad (melted/broken) solder connection inside the motor. Also the the cooling fan hub (plastic) had broken out so the fan did not spin.
It took about an hour to fix both problems; the compressor now works. But it's insanely loud. Also it takes about 3 minutes to pump up its small (8 gallon) tank.
But I got it for free - so it was worth what I paid for it(!)