Genrac 4000
Hey, here's something I know a bit about! I run a Genrac 4000 watt generator, almost daily since it's the only source of power I've got right now (we're only $14,000 away from the power lines). I think it's called a 4000XL or something meaning extended life engine.
So far it's been mostly trouble free, it probably runs 4 to 8 hours a day, every day since winter hit (we charge a 500lb forklift battery to run the 12V stuff like the furnace when the genny is off).
It's not the quietest genny I've heard, but it's not bad. Seems to start on the first or second pull, even at 10 degrees. It has enough power to run the 1HP well pump to fill the trailer tank.
Now for the problems. Once it got cold, we kept having problems with the carb icing up. Turned out this was due to the crankcase breather tube which exhausts into the air cleaner box. Condensation in the crankcase would evaporate when it warmed up and freeze in the carb. I pulled the tube out of the air box and plugged the hole in the box. No more icing.
The only other problem was with the pull starter. The rope/recoil thing is held on with a plastic clip thing. Once, the engine fired backwards while pulling and pulled the rope out of my hand and broke the plastic clip thing. I drilled it out and fixed it with a 3/8" carriage bolt. It won't break that way again
-cj