As well as flushing the tank, you need to clear the outflow fitting where the fuel line connects to the tank. Some engines have a mesh filter there - I don't know whether yours does. If there is a filter, remove and clean it then reinstall.
To get to the needle you need to remove the float-bowl. Your carburetor is called a 'small one-piece flo-jet'. You remove the float bowl by unscrewing the hex nut at the bottom of it. However as Bruce said, you should remove the carburetor to do this - it is a delicate process and you could do more harm than good if you try to do it without being able to see properly.
The attached pictures show the parts of your carburetor. The float bowl is the roughly-hemispherical part at the bottom, retained by a nut in the center. There is a fragile gasket between the nut and the bowl - don't wreck it.
The engine's model, code and serial number are stamped on the tin air cowl that directs cooling air from the flywheel fan around the cylinder head. It is in the form of flour blocks of numbers. The first block is the engine size and type, and the third is the year and month of manufacture. The other two blocks are more or less inscrutable.
Last edited by grumpy; 15/12/0903:07 AM. Reason: add serial no. info
