Quote:
Originally Posted by johnco
if I remember correctly, those old motors used a vacuum operated fuel pump. check the diaphram in the fuel pump for cracks/dryrot. pumping the bulb fills the bowl which runs dry if the fuel pump isn't filling it and motor dies. runs again when you fill the bowl with squeeze bulb right?
old trick I used to use was to put the fuel tank higher than the carbs and let it gravity feed. if it keeps running, then you have a vacuumleak/fuel pump issue
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Exactly, before you go into all the other issues make sure there isn't a vacuum leak. Double check the connections, the lines, the bulb. How is the connection between the fuel line and the tank made? Hard connection or the spring loaded connection like the photo? If it's like the photo they are notorious for leaking. Make sure your connections are secure before you start tearing you motor apart.
