Dave Sherman
Thread starter
Trying to make some sense of a carb from a 1970s (or so) Briggs engine, model 130232-0169. This is on an old Black and Decker generator I'm resurrecting. After fixing the ignition points and cleaning the carbon out of the cylinder head, I got it running, but having trouble with getting it running reliably. On the plus side, the generator head makes power.
Here's the part I'm trying to figure out. The carb has two pickup tubes. One long one that goes to the bottom of the gas tank and leads up to the needle valve. The other is a shorter one that fits into this smaller tank that's internal to the gas tank, and leads up to a diaphragm pump. I'm trying to figure out if that shorter tube is return or another pickup. I haven't opened the pump cover to see if it's pumping gas yet, but the trouble I'm having is the engine runs fine at idle, and I've got the needle valve dialed in. Once I open the throttle close to operating speed, it seems to be leaning out badly, I have to give it choke to keep it from stalling. Possibly related, but it refuses to start unless I pull the choke even when it's warmed up; almost like when the throttle is wide open it's getting no fuel.
Any ideas? Things seemed to going along smoothly until I started adjusting the governor, it just seems determined not to run smoothly over 3,300 RPM (55 Hz on the AC side).
Edit: Forgot to say, the carb has been cleaned up, has new gaskets, and a new diaphragm/flapper valve for the pump.
Here's the part I'm trying to figure out. The carb has two pickup tubes. One long one that goes to the bottom of the gas tank and leads up to the needle valve. The other is a shorter one that fits into this smaller tank that's internal to the gas tank, and leads up to a diaphragm pump. I'm trying to figure out if that shorter tube is return or another pickup. I haven't opened the pump cover to see if it's pumping gas yet, but the trouble I'm having is the engine runs fine at idle, and I've got the needle valve dialed in. Once I open the throttle close to operating speed, it seems to be leaning out badly, I have to give it choke to keep it from stalling. Possibly related, but it refuses to start unless I pull the choke even when it's warmed up; almost like when the throttle is wide open it's getting no fuel.
Any ideas? Things seemed to going along smoothly until I started adjusting the governor, it just seems determined not to run smoothly over 3,300 RPM (55 Hz on the AC side).
Edit: Forgot to say, the carb has been cleaned up, has new gaskets, and a new diaphragm/flapper valve for the pump.