Fuel Coming out of Vent in Vacuum Fuel Pump

[bdodd]

I have been having starting issues with my Panterra 90cc. I thought I fixed it with a new vacuum fuel pump. It ran great, then my daughter stalled it out and now won't start. I monkeyed around with vacuum fuel pump to make sure fuel was reaching the carburetor and now when I crank, fuel comes out of the vent tube. The original fuel pump the vent tube is sealed, but the new one is open. I had a mechanic go over it last year and it ran great and has a rebuitl carb. I think my starting issues are tied to the fuel reaching the carburetor. It is very hit or miss when it starts and runs great and when it doesn't. Here is a picture of the new pump. Thanks so much for any advice.

[Bruces]

Try sealing the vent tube .I don’t think that style pump needs or uses a vent ,I suspect the extra nipple is to run a second carb on a twin application .

[bdodd]

Thanks. it is labeled vent, but I will seal it off and see what happens. Appreciate the response.

[FLASHLIGHTBOY]

if the fuel supply ( tank ) is higher t han the carb... throw that away... not needed... all the others run good.. just plug the vacuum line... you will see .. it will run ok..

[ZiptieJonez]

I personally prefer the manual petcocks over the vacuum operates ones but that's just my opinion. If the tank is higher than the engine, like flashlight said, you can remove that one or put a manual one on. I like the option of the manual one so you can shut off fuel supply while taking carb off to clean or to drain the carb for storage.

[ZiptieJonez]

Also the manual ones are simpler. Line in, line out and then on/off.