I see some small portable generators (3000 - 4000 watt) on sale. $450
(CAD, which is $340 USD) for a Champion generator - I think this one:

https://www.championpowerequipment.c...age-generator/

My furnace has a conventional AC blower motor - not sure if it's PSC or
some other type. It's either 1/3 or 1/2 hp and doesn't have a large
capacitor either built into it or wired up near by. My 40-year-old
furnace otherwise has NO electronics other than the gas-valve soleniod.
No draft inducers, sensors, vent fans, etc.

Anyone ever run such a motor from one of these small generators?

Just thinking of picking up a generator to run my furnace
(intermittently) in case of any extended winter power outage.