A couple of months ago I bought a 76 Mobylette. I’ve been slowly restoring it mechanically to get it back on the street. It’s been going pretty well except for a couple of issues.
I can’t seem to get a consistent strong spark. I replaced the points and condenser, set the gap and all looks good. After double checking everything, I changed the coil with one I had laying around, got good spark and started the bike. It would run with the choke on, but not at all with the choke off.
I discovered the main fuel passage that goes from the lower part of the fuel bowl to the main jet and it was plugged with trash.
Now, here is what I don’t understand. How could the Gurtner design ever work? I must be missing something, because I don’t know how fuel can go from the bottom of the bowl directly to a main jet that is open on the bottom. As soon as fuel starts filling the bowl, it starts running out the bottom of the main jet. I’m sure I’m missing something that is installed wrong or ??? Thanks for the help in advance.