Honda HT3813 project..leaks
I recently picked up an HT3813 project that I knew was in need of a timing belt due to what the previous owner had told me. It would backfire through the carb after about 5 minutes...but he could continue to run on full choke.
After changing the belt and water pump and cleaning everything up...I went to start up. It fired right up, and ran very smoothly. However, it shortly shut down for some unknown reason. It was then I noticed it was leaking a healthy stream from the fuel catch on the frame. It appeared that the fuel pump was going to feed fuel as long as the key was on. It seemed odd...but I figured I'd need a new needle to take care of the excess fuel problem. I put in the new one, and once again, the engine fired right up very smoothly...and soon shut down again after 10 seconds. Once again, the fuel was leaking from the catch pan. There appears to be a larger connection on the fuel catch with nothing on it...does there need to be a hose connected there? The catch leaks out of the bottom it seems anyway...so I'm not sure what's happening there.
My main question is this...is there some sort of shut off of the fuel feed in some other manner than the needle? Is there a relay that senses fuel pressure? Should there be some sort of fuel return to tank rather then on the ground? I could be missing a part, however I have a service manual that is not showing me something I don't already see. I had drained the tank, and changed the fuel filter while waiting for the needle to come...so the fuel system is very clean now. I'd really like to use this thing because it's so darn cool!