Post by scottruel on Jul 26, 2018 13:41:08 GMT -6
Hello,
Im new to Vespas, and im trying to help a friend fix his 1963 vespa. The vespa went "under the knife" originally because of a leaky carburetor. after much deliberation and trouble shooting, someone suggested that since the scooter was old, and the owner frequently left the gas (that looked as though it was quite old and dirty) on when not using the scooter, that there was potentially some dirt clogging some part of the carb, causing a back-up of fuel pressure which led to fuel spilling out of the top of the fuel bowl. I tried cleaning the carb, and drained the tank and put new fuel in, but the leak persisted. I was able to find a new (reproduction) matching carb to out on the scooter and the leak was fixed. however, now the scooter will no longer start. When I first installed the new carb the scooter would start, idle high and rough, and then die. I figured maybe the idle was set wrong so I put the mix screw and the idle screw to the recommended factory settings and tried again, but still nothing. I can not for the life of me figure out what might be causing the issue. Spark plug is still sparking well, and is not fouled. Theres a brand new air cleaner on the carb. Im totally lost
My only thought is that the scooter had a Dellorto si 20/15 C, and the new one is a Dellorto si 20/15 D. Could this cause that big of an issue?
Any help would be GREATLY appreciated
Thanks!
Im new to Vespas, and im trying to help a friend fix his 1963 vespa. The vespa went "under the knife" originally because of a leaky carburetor. after much deliberation and trouble shooting, someone suggested that since the scooter was old, and the owner frequently left the gas (that looked as though it was quite old and dirty) on when not using the scooter, that there was potentially some dirt clogging some part of the carb, causing a back-up of fuel pressure which led to fuel spilling out of the top of the fuel bowl. I tried cleaning the carb, and drained the tank and put new fuel in, but the leak persisted. I was able to find a new (reproduction) matching carb to out on the scooter and the leak was fixed. however, now the scooter will no longer start. When I first installed the new carb the scooter would start, idle high and rough, and then die. I figured maybe the idle was set wrong so I put the mix screw and the idle screw to the recommended factory settings and tried again, but still nothing. I can not for the life of me figure out what might be causing the issue. Spark plug is still sparking well, and is not fouled. Theres a brand new air cleaner on the carb. Im totally lost
My only thought is that the scooter had a Dellorto si 20/15 C, and the new one is a Dellorto si 20/15 D. Could this cause that big of an issue?
Any help would be GREATLY appreciated
Thanks!