Re: Vacuum petcock on scooter, how long should it hold pressure?

Mark Booth /
This single post is part of a larger thread. Start from the top or view this post in context.

The vacuum line is directly hook to the intake usually. Once you shut off the engine the vacuum drops immediately and closes the petcock. If you have a hole you would never start or run.

If it starts easy hot but does not cold 2 issues...

#1 Fuel drains from the carburetor? The engine starts with the remaining fuel after you turn it off. Once the engine starts the vacuum is there and opens the petcock for fuel. You are off and running.

#2 the Auto Choke is a very odd option on these scooters. It is electrical and when cold it chokes the engine to start easy the first time and then after a little time it goes back to normal. You need to check that this part on the carb is working right for the cold start.

Never turn the engine over without a spark plug in place you could ruin the CDI Box.

I hope this helps. It has been a long time since I worked on a scooter but this is what I remembered from the one I did repair.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Vacuum petcock on scooter, how long should it hold pressure?Topic by: Stephen Keller Stephen Keller 09/07/20 11:07PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Mark Booth Mark Booth 09/07/20 11:28PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/07/20 11:36PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Mark Booth Mark Booth 09/07/20 11:46PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/07/20 11:55PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/07/20 11:58PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Mark Booth Mark Booth 09/08/20 12:12AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/08/20 12:30AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Mark Booth Mark Booth 09/08/20 12:16AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Thomas TPRF Thomas TPRF 09/08/20 12:41AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/08/20 12:52AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Pops Peds Pops Peds 09/08/20 09:21AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/08/20 11:05AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Thomas TPRF Thomas TPRF 09/09/20 11:47AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/09/20 12:46PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Pops Peds Pops Peds 09/09/20 05:12PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Graham Motzing Graham Motzing 09/09/20 01:42PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Born to be WillD Born to be WillD 09/10/20 09:58AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/10/20 11:10AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Pops Peds Pops Peds 09/10/20 11:25AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/10/20 11:33AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Born to be WillD Born to be WillD 09/14/20 11:04PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/15/20 12:08AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Thomas TPRF Thomas TPRF 09/15/20 10:10AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Pops Peds Pops Peds 09/15/20 09:22AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/15/20 10:25AM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: live ɘvil live ɘvil 09/15/20 05:37PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Pops Peds Pops Peds 09/15/20 06:29PM
  Re: Vacuum petcock on scooter, how long should it hold pressure?Re: Stephen Keller Stephen Keller 09/16/20 12:48PM

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account