The Problem:
* Fuel Level Too High: If the float needle valve isn't sealing properly or the float is out of adjustment, the fuel level in the carburetor bowl might be too high. When you give it gas, the excess fuel floods the engine, causing it to stall.
Solutions:
1. Double-Check Float Valve Installation:
* Ensure Proper Seating: Make sure the float valve is properly seated in its housing. There might be a tiny spring or a gasket that needs to be in place.
* Cleanliness: The float valve seat can get clogged with debris. Clean it thoroughly using carburetor cleaner and a soft brush.
2. Float Adjustment:
* Float Level: The float level determines the amount of fuel in the bowl. Incorrect float level can lead to flooding or a lean condition.
* Reference Your Manual: Consult your Recon 250's service manual to find the correct float level setting. You'll likely need to bend the float arm slightly to adjust it.
3. Other Potential Issues:
* Clogged Jets: Other jets in the carburetor, like the main jet or pilot jet, might be clogged, restricting fuel flow. Clean them with carburetor cleaner and a thin wire.
* Air Leak: A small air leak in the intake manifold or carburetor can cause a lean condition, making it difficult to idle. Inspect the intake manifold and carburetor for any cracks or loose connections.
* Dirty Fuel: Old or contaminated fuel can gum up the carburetor. Drain the tank and replace with fresh fuel.
Important Tips:
* Patience is Key: Adjusting the float level can be a delicate process. Don't rush it.
* Test After Each Adjustment: After making any adjustments, start the engine and test it.
* Professional Help: If you're unsure or uncomfortable working on your carburetor, it's best to take it to a qualified mechanic.
Let me know if you have more details about the specific issue you're facing. I can give you more specific instructions.