Originally Posted by
KenLambert
make sure the diaphragm is in the fork on the needle arm some times they come from the factory mis installed and holds the needle seat open.
Good point! I have seen 100cc carbs without the grooved pin on the diaphragm. All depends on which Walbro DLE copied. But you are 100% correct, if it does have this type of engagement and it is not done correctly then it's going to leak like crazy.