Poulan leaf blower bv1850 Runs greate for about 30 seconds, then dies. Replaced fuel lines and installed carb kit. No better. Adjusted the one adjustment screw out 1-1/2 turns out for starting position. Then out a good bit to get it to run.

Sounds like you made the Fuel line in the tank too short . OR the stone filter on the fuel line is not able to move about the Fuel tank to follow the fuel

I would get a carb kit (they're cheap) and completely clean the carb. Also, check out the gas tank vent.
It's definitely a fuel issue.

Look at thd fuel lines. They may have come undone which is why its flooding the air filter. Take the air filter off and look to see where the fule is coming from, that will give you a better idea of how to fix it.

If the fuel filter has fallen off the fuel hose, then the internal carb screen will be blocked, you need the remove the carb, remove the cover on the carb held with a single central screw ( pump side ) here you will find the screen ( fine filter ) clean or replace this, if you can acsess the cover without removing the carb all the better.

check the fuel lines for holes or cracks if they are fine then a carb kit may be needed

The unit is lean. rebuild the carb with a carb kit and check your fuel lines. If they are brown or discolored or brittle they need to be replaced. carb kits run approx. 11 - 18 dollars from your local dealer.

its a fuel issue. check fuel lines and fuel filter. If fuel lines are discolored or brittle or if filter has become unattatched from line- the fuel lines need replaced. Then carb needs adjusted ( turn low speed jet out 1/2 turn) or rebuilt

Check the fuel lines for cracks/breaks. If they are o.k., then:

You will need to disassemble the carburetor and spray with carb.cleaner.Make sure the small screen is free of debris. (Should be able to see daylight through it.)

Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152),to clean the small portals in carb. These portals can become blocked. Reassemble and start.

If the carb. parts are more than 4 years old, you may have to replace them.

If you need further assistance on:
1. Fuel line replacement or
2. Carburetor kit replacement

Just let me know.

Jim

You will need to check the fuel lines for cracks/breaks.

You will need to disassemble the carburetor and spray with carb.cleaner. Make sure the small screen in the carb. is free of debris. Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152), to clean the small portals in carb. These portals can become blocked. Reassemble and start.

(NOTE: If the carburetor parts are more than four years old, and depending on the use, you will need a new carb. kit if the cleaning doesn't work.)

If you need further assistance, just let me know.

Jim

Check fuel filter,,lines, then carb.
It may need a carb kit.