We use generators , 3500 -6000 . Hondas are the choice motor. B&S don't last long , Kohler are even worst. At one time we had over 30 running every day .
I like the "OHV" Honda's too, but even their cheaper OHC models aren't too bad. The OHV models are no better that the Briggs Vanguards though, and Briggs has a MUCH better warr...
My friend owns a sawmill company, he has switched from Honda OHV to Vanguards, and has seen no increase in motor problems, BUT when you do see the odd problem, Briggs takes care of it MUCH better.
One customer had his 20hp Honda break a crank with only 10 hours on the clock. This is VERY rare, but it happen, and it was a real excerise in patience to get Honda to replace the motor! It took weeks of Honda screwing around with the customer trying to get out of the warr...
For a time Honda 13's would break the bolts holding on the mufflers, yet Honda didn't want to take care of the problem.
Then there was the problem with the Honda 20's stalling all the time in cold weather, and Honda just couldn't fix the problem. That was the straw that broke the camels back, and my friend switched to 23hp Vanguards to replace the 20hp Honda's. What an improvement!!
The Briggs Vanguard on my sawmill, starts and runs perfectly, and has very good power, i'm very pleased with it, as are all of my sawmill friends who have the same motor.
DM