I don't want to sound argumentative. But I was a Industrial Electrician for 35 years and those numbers don't compute with me. Here is the specs that I copied from a Grizzly 2 HP dust collector. I would say that you may have a bad breaker in the gen set. You might want to borrow a gen set from a friend that is approx. the same size and or take the collector to his house and test it. That way you won't get caught with a bad gen set if a Hurricane does show up. I would definitely pursue it and check it out. Like I said, I am not trying to be argumentative. Good Luck.
Motor: 2HP, 240V, single-phase, 3450 RPM
Motor amp draw: 9 Amps
Air suction capacity: 1550 CFM
Static pressure: 11"
6" inlet has removable "Y" fitting with two 4" openings
Impeller: 12-3/4" balanced cast aluminum
Bag capacity: 5.7 cubic feet
Standard bag filtration: 2.5 micron
Portable base size: 21-1/4" x 33-1/2"
Bag size (dia. x depth): 19-1/2" x 33"
Powder coated paint
Height with bags inflated: 78"
Approximate shipping weight: 122 lbs.
Every one has a photographic memory. Some just don't have film.