OK After putsing around the net for about 45 minutes I finally determined that there was no answer on the net about how to get the fuel lines situated between the tank, primer bulb, and carburetor so I decided to figure it out by trial and error. After about 2 or 3 configurations I tore apart the carburetor to analyze the flow of fuel. I discovered that the fuel "inlet" was the bottom nipple on the left side (the side with the choke lever) and that the top right nipple was the "fuel return" to the tank. The primer bulb doesn't force the fuel through the carburetor but rather suck it through.
The primer bulb has 2 ports; suction and discharge. The suction port is the one towards the edge and the discharge is in the middle. The fuel tank has 2 hoses that run through it. I do not remember the diameters, but there is a small one and a larger one. The hoses make a tight seal with the tank when pushed through the holes. The small hose should have a weighted filter at the end inside the tank with enough slack to reach the two front corners of the tank. This is to allow the engine to pick up fuel from the tank with it tilted in just about any angle.
The small hose should run from the inside of the tank with the filter on it to the lower left fuel nipple on the carburetor NOT connecting to the primer bulb. Remember to allow enough slack in the line to allow easy disassembly of the carburetor. The larger hose should run from the tank to the middle (discharge) side of the primer bulb. Allow at least 1/4" of the larger hose to stick inside the fuel tank to prevent it from pulling out accidentally. The large fuel tank line does not need a filter as it is a feed back into the tank from the primer bulb. There should be another larger hose that runs from the top right nipple on the carburetor to the outer (suction) nipple on the primer bulb. Basically, the primer bulb when plumbed properly will suck the fuel from the tank through the lower left nipple, through the carburetor and out the top right nipple there fore priming the air out of the carburetor. There will be air bubbles sucking through the top right nipple along with the fuel as the bulb is sucking some air in through the venturi (I think that's how you spell it).
Hook up the lines as described above, fill the tank (Remember it is 40:1 fuel to oil and NOT 50:1 which will destroy the engine), prime the carb, choke engine, pull cord 2 or 3 times, release choke, start engine and have fun!
Hope this helps you guys! God bless and happy weedwacking!
DeWaltMan_Z, September 2009
