I bought a well-used 150BF through eBay and it worked perfectly all through the fall season until recently. All of a sudden, if I want it to run without cutting out, I have to keep the choke lever closed almost all the way. Seems like it is just not getting enough fuel. I have tried leaving the tank cap on loose, replaced the fuel filter and fuel line, checked the spark plug condition (seemed wet)and gap. I am using 10% ethanol fuel and a universal 50:1 to 16:1 oil.
Is this a common malfunction for the model and what are the fixes?