Motor runs on full choke only

SOURCE: Rough Running

It depends on the type of engine but it sounds like your carbeurator is running lean. there is and mixture adjustment screw on most of the older models, alot of the newer carbs. are pre set to emission standards. try a fuel additive called sea foam, this product has solved solved many of my fuel related issues.

SOURCE: only runs on full choke

You can try to open the high speed jet a little on the carburetor. This may fix the problem.

If you need more help, post a comment and I will get back to you

Tim

SOURCE: engine does not continue to run

Are you laying off the choke at any point? Full choke should only be used when starting a cold engine, it should run with no choke on full throttle. If there is not enough throttle i'd first try adjusting the tiny black screw on the carb beneath your air filter while you have it idling, letting the throttle have a little bit more room. If this doesn't work and you're running it properly than you may need to make some adjustments to the H L settings for your gas/air mix. This is also done while idling mind you and only with a clean air filter.

SOURCE: will run with full choke on but once i turn choke off it dies

The carb jets are clogged, it will have to be removed and soaked in carb cleaner. Sometimes that will not work either, and the carb will have to be replaced. Reason is, some of the carb passages are as fine as a human hair, so it's hard to get gunk and bad/dried gas deposits out.

You could try running something called Sea Foam (mixed in the gas)from Walmart through the tiller for a while, that MAY help somewhat.

SOURCE: i have honda fg 110 a mini tiller it starts fine

I have a similar problem.
The first time it was cause by the ethanol in the gasoline. It deteriorated the carberater rubber membrane so that it had a crack in it. The carberater would run lean. Take off the primer bulb and there is a plastic cover that goes over the rubber membrane. Remove that cover, and check the membrane. If this has a crack, you can order another from a honda dealer. It is about 14 dollars. After that just use ethanol free gas. Search the internet for a local source.

The second problem I had developed a little later. The engine would start, but if I gave it full throttle, it would quit. It got worse and worse till it would run at all. I noticed when I loosened the Gas cap, then the engine would run. And when I loosed the cap, I heard a whoosh, like air being sucked in.
So I figured the cap wasn't breathing like it should, which cause a suction in the gas tank. So I took a diaper pin and went through the holes on the inside of the cap, and through the little rubber plug in the center of the inside of the cap, several times. This allowed the cap to breath. Now it runs great.