Cleaned carburetor, tested fuel tap, still stalling. By frolicndetour (Read 1,079 times)

[frolicndetour]

Bashan -- It does have an automatic choke on top of the carburetor.

Alley-- It is a dellorto 17.5mm phva carburetor with an electric choke. The pictures I find online for my type of carburetor look different than mine, though. I have a valve on airbox side of carb for vacuum to fuel tap, then on opposite side I have a valve for gas line from fuel tap, and then three valves stacked on top of each other: one is coolant, and I don't know what the other two are for because no fluid comes out of them when I remove them (sorry, I am newbie). The bottom one is semi-clear, smaller, and goes into a box with no visible exterior connection at the other end, looks stained like it used to have oil in it but it is dry currently (which worries me).  

I have pictures on my digital camera but cant upload them now, will do it as soon as possible and report back.

[Bashan]

Uh yeah.....that would be your oil injector tank. It is supposed to be filled with oil. Worst case scenario is you've run the engine without oil and burned it up. Two cycles use the crankcase as part of the fuel delivery system. If you were running without oil it could do serious harm. This would explain everything. The engine will run for a bit until it overheats and then seize. When it cools down some it releases and starts again. It's been running shorter and shorter times as more damage is done to the engine. I hope I am wrong here.

[frolicndetour]

When I open the cap to the reserve oil tank underneath the seat I can visibly see oil in there. And the dashboard oil light never comes on. I do sincerely suspect this tube used to have oil passing through it, however. I'll post pictures as soon as I can.

[frolicndetour]

link to some pictures I took of my carburetor the other day when I took it off. I'll take better pictures of the set up soon. On the thumbnail I have included, the bottom valve is the one that holds oil. I just ran the scooter and it appears wet inside but it was too dark to commit to pulling it off.

[frolicndetour]

Wanted to thank you guys for the assistance. My scoot is running now, and it seems like it was just a matter of batting the air mixture screw back and forth to find the right mixture (slowly, in small increments over time), along with the idle speed screw being set too low.

Last week I would start it for 30 seconds, and it would stall. I'd come back in about 6 minutes and try it again and it would start, lights on dash would flicker for a few minutes, but after warming up it would run strong. Never did identify why this was happening. I took it on a long ride to pick up some Chinese food, and I also raised the idle speed, and it seems to be running loud but good now.

Also, its guzzling gas all of a sudden. I couldn't get it to move from full, and now all of a sudden I'm down to quarter tank. I've only really put less than 10 miles on this tank, it doesn't make sense.

Any insight appreciated, folks!