This has saved me lots of hassle. I try to always turn the fuel valve off on my portable generators while they are running and when the engine starts to misfire from fuel starvation I put on the choke to keep it running as long as possible. This runs the carb dry which has a couple benefits:
1. deteriorating fuel can't plug up any little passages in the carb and
2. moving the generator, especially in a vehicle off-road will not continuously slosh fuel and flood the engine.
A stupid mistake I made was to start a genny before taking it into the field just to be sure it was OK and ready to go. It was and started right up. I then drove a quarter mile and couldn't start the genny as I hadn't run it dry and it got flooded. I pulled until I nearly pulled both arms off (alternating arms) and finally got it to run, barely.
Another time my larger electric start genny wouldn't start, not even fire a little. I removed the air filter and wet it with gasoline. (Shake it out so it is dampened but not dripping.) Then replace the filter and cranked the engine. It fired right up and ran for 15-20 seconds, proving the problem was definitely a lack of fuel. getting through the carb. Of course when the air cleaner dries out the engine dies again.
Somehow something in the carb had gotten plugged up. There is a bleed screw in the bottom of the float bowl and it ran clean fuel when loosened. I removed the bowl and raising and lowering the float turned the fuel off and on intermittently as it should.
I siphoned the tank dry and added half a can of Berryman's carb and choke cleaner. I loosened the bleed screw on the bottom of the float bowl until if ran some fuel/Berryman's out. I re tightened the bleed screw and let it soak for a few minutes and then wet the air filter again with gasoline and started the engine to develop vacuum and help suck the Berryman's through the little fuel passages in the carb. I then drained and saved the Berryman's as it is still good. I then added some gas to the tank and it cranked right up and ran fine. I shut it down and let it set for a few minutes and later it started right up, problem solved with no disassembly of the carb except fussing with the float bowl.
While I was playing with Berrymans I put a little through the manual start genny as a preventative measure. I have 4 chain saws and will be using them again soon and will put a dose of Berryman's through each of them. In the past when a saw got balky or didn't seem to be up to par with no real explanation at hand, normal full power was restored by running a liittle Berryman's through with a partial tank of fuel. That takes less Berryman's than doping a full tank and I don't like to over do it. It isn't necessarily the total amount of additive that gets the job done it is the concentration. Running briefly on a stronger mix of Berryman's seems to do better than a long run with a weak mix.
STABIL is a gooooood idea for generators, chain saws and other intermittently used gas powered thingies.
Pat