I seriously considered the Harbor Freight Predator generator but after comparing decided to go with the larger, cheaper unit. Differences are as follows.
The Sam's generator cost $594 plus tax with no shipping charges. It is 10,000 starting and 8,000 running watts. The Harbor Freight Predator is 8750 starting and 7,000 running watts and cost $670 with the wheel kit and battery both which come standard from Sam's. They both have a 420cc engine which appears the same in pictures and specs in everything except horsepower. The Predator is 13-hp and I saw somewhere that the GenCorp is 14-hp. Only difference I can find is specs is that the Predator requires 87 octane, GenCorp 90 octane. I will burn ethanol free gas in any generator I own so that doesn't matter to me. The GenCorp unit is 37 pounds heavier but that may be because it comes with wheel kit and battery. The Predator is 76db while the GenCorp is 77db. Run time on the Predator is 12 hours at 1/2 load on 6 gallons. On GenCorp run time is 11 hours at 1/2 load on 8 gallons. THAT is a huge difference in fuel usage. Especially with the octane difference. I do like the larger fuel tank, burn it down to slightly less than a third and dump in an entire five gallons.
Both look to be good units for emergency use but not what I would get for using every day. If I intended to use the generator on a daily basis I would get a Honda or Yamaha.
They are still on sale and my unit should be here on the 20th of December.
RSKY