Originally Posted by
bmorgil
Jags as always I am getting this confused with another post on a similar issue. I thought you were getting no fuel at all. It seems you are fine once you get it started, and it runs fine once it starts. One change, before you try to fill the bowl through the vent, pump the throttle and see if the accelerator pump squirts fuel down the throat of the carb. If it does there is already fuel in the bowl. It should have enough for 3 or 4 pumps and it should squirt every time (if it doesn't have enough fuel in the bowl to squirt 3 or 4 times, fill it through the vent till it does). That should be plenty of fuel to at least get it to fire. If it fires but wont keep running give it 1/2 choke and try again.
I am wondering on your starting technique Jags. It sounds like it just wants a little extra fuel when you start it. Once we are sure the fuel isn't leaking out of the carb, I think a look at how its starting might help. I am not sure how familiar you are with starting these classics. It isn't like a modern vehicle, the onboard computer is no help! You have to feed it just what it wants. A little air with the throttle, a little extra fuel maybe depending on how warm it is, with the choke or accelerator pump, and give it a try.
Will it start right away if you choke it nearly full? It starts when you dump fuel right in it, so we know it isn't getting fuel on its own to help it start. It could be an Idle circuit that needs tuning or the motor may just need a little more fuel to start. I am assuming you give it a few pumps and a little throttle when you try to start it after it sits for an hour. What is your technique for starting it after it sits for a while?