By echo blower will not run unless the choke is on even after is warmed up. In other words, when I turn the choke off, the engine will begin to cut off. Thus, I'm not able to get the full benefit of the blower.

Hello,
My name is Dane and I am going to assist you in solving your problem.

Make sure the fuel is mixed correctly. Too much oil in the mix will cause problems.

If you are still having problems, you will need to adjust the high-speed mixture setting on your Carburetor jet. Turning the screw out just 1/2 turn or so should do the trick. It is not so hard to adjust the Carburetor, however you do need a special tool that is very hard to get your hands on, in order to adjust the jet screws. They don't make many engines with plain screw heads anymore. The newer Carburetors are factory set lean so they can pass emission standards. If you have a local dealer, they should adjust the mixture for a couple of bucks. Before you take it in to the shop, make sure you haven't left old fuel in it for a long period of time and gummed those jets up. Sometimes an engine just needs to run in order to clean the jets out. If this is the case, just replace the fuel and get it running and work it normal for a tank of fuel if you can.

Just a TIP: Always mix your fuel with an approved fuel stabilizer. Fuel begins to go bad after a few months and that's why many people have fuel problems in the spring.

I hope I've helped. If you found this reply useful, please leave me some THUMBS UP, if you feel I

Fuel, fire, air. That's what makes it all work. So all we need to do is converge on the problem.

Generally, if it runs and dies...ITS A FUEL STARVATION PROBLEM.

Only a couple of issues there...
-too much air
-insufffient fuel.

that's the interesting diagnostic part...is that the machine works on a balance (lets ignore 'fire' because we just agreed we had ignition and can focus on fuel/air).

insuffient fuel -- 1. carb has buildup of petroleum (ie: varnish) in 1mm holes [shame on you...you didn't maintain. winterize or add seafoam or marv marvelous oil peridodically or add stabalizer whenver you use it]).
to fix:
either disassemble and clean with carb cleaner, maybe buy overhaul kit for 50% of carb value, or buy a new one.

too much air ... we have an air intake leak on the carb causing TOO much air....ergo...lean. it'll run HOT ! and could die because its too hot. fix lean condition noted above OR close up air intake...like the gaskets.

Now....onto Virgin Galactic rocket scientry.......