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Re: Leaf blower won't stay running
Replace fuel with clean fuel with proper oil mix. Also the carb. could need cleaning or diaphragm could need replaced. One thing you would need to check that will not cost much but may save you a lot of trouble is the muffler. Check the muffler for obstructions and remove the muffler and check the exhaust port for carbon buildup.
Two cycle engines have a habit of vibrating enough to cause bolts to come loose. You could have a leaky head gasket or crank cover gasket and still be getting excellent compression at the spark plug. If there are leaks then the piston won't be able to create enough suction on the up stroke to pull the gas/oil mixture from the carb at low rpms
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This sounds like a choke issue. Do you have a choke on that engine?
The purpose of a choke is to allow for a varying air:fuel ratio depending on how hot the engine is. A cool engine needs a more rich mixture of fuel to air. Once the engine warms up, it runs best with more air. The Choke is a mechanism that allows the operator to manually adjust this mixture. Generally, the choke is closed to start a cold engine, then is opened in 2 or 3 stages as the engine warms up. As the operator, as the engine starts to run smoothly, you would actuate the choke to the next notch, changing the fuel:air ratio so more air is mixed in with the fuel. It's probably best to give the engine a few minutes to warm up while you progress through the choke stages until it's fully open providing the best mixture for operation prior to beginning to clear the snow.
If you follow that process and the engine stalls when the choke is opened, then you need to clean your carburetor.
I think you are mixed up. The choke is usually closed to start a cold engine and opened once the motor warms up. The choke is closed to restrict the air flow and make the mixture richer in fuel. You can't open a choke that's already open. It's stalling because it's starved of fuel. Either a blockage or the fuel pump is not supplying enough gas.
It sounds like your carburetor needs cleaned. If you started it for the first time without emptying the old gas, you may have had dirt particle's that had settled at the bottom of the tank. This would explain why it had ran the day before. If you need further assistance on how to clean the carb., just let me know.
If the oil level is low it will do this, but I also know this to happen when the oil is very cold (thick) an won't fow back own o the crankcase where the oil sensor is. The slow return results in a low oil level. My solution is to start it, when it dies wait a couple of minutes and retry... after a few starts, the oil will warm up, thus flowing back down faster and it then will run. Another option is to use a thinner oil ie;5-30w.