• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

82 Gs550, carb not pulling fuel/or petcock

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
So I removed my tank to clean it up and replace the gasket and washers on the petcock. I tested the petcock for flow on prime and on on before putting the tank back on. I put the tank back and on the bike and it initially fills the line and bowls. I’ll start the bike and run it on idle for 5 minutes and it starves. (Yes the vacuum line is connected) I’m obviously somewhat of a novice and I’m probably overlooking something simple. Any troubleshooting ideas?
Bike was running fine before I took the tank off.

thanks,
John
 
Uh, Uh, Uh, Uh, Seems strange from what you did. Raise rear of tank & unhook fuel line from pet cock,. turn to Pri., if fuel flows full stream the problem is something farther down.
 
rphillips said:
Uh, Uh, Uh, Uh, Seems strange from what you did. Raise rear of tank & unhook fuel line from pet cock,. turn to Pri., if fuel flows full stream the problem is something farther down.
Click to expand...

I thought it was strange too. I tested the flow on prime and it flows freely when not attached to line, if I attach the line and hold the tank up, it will flow also, but nothing in the on position when attached.
 
There's "GOT TO BE" be vacuum on the small line at the pet cock to make the fuel flow when in "ON" position. That's how they work, when in "ON" no vacuum (eng. not running) fuel is automatically shut off, vacuum on (eng. running) fuel is automatically turned on. If you connect a piece of vacuum line to the vacuum port, you can lightly suck on it to see if fuel flows as designed in "ON" pos.
 
rphillips said:
There's "GOT TO BE" be vacuum on the small line at the pet cock to make the fuel flow when in "ON" position. That's how they work, when in "ON" no vacuum (eng. not running) fuel is automatically shut off, vacuum on (eng. running) fuel is automatically turned on. If you connect a piece of vacuum line to the vacuum port, you can lightly suck on it to see if fuel flows as designed in "ON" pos.
Click to expand...

Roger that, the vacuum tube is connected, it has suction and yet no fuel flow in the ON position. Even in the PRIME position the flow will stop and the filter and fuel line will empty into the carb and a few minutes later the bike will quit (obviously). Perhaps the vacuum is blocked inside the petcock? Seems unlikely but that?ll be my next inspection.
 
On Prime the fuel should flow full stream constantly, vacuum or no vacuum, vacuum has nothing to do with that position.
 
rphillips said:
On Prime the fuel should flow full stream constantly, vacuum or no vacuum, vacuum has nothing to do with that position.
Click to expand...

Thanks, I understand the general functions of the system, what I don?t understand is why when I put the tank back on it would no longer function when no changes were made. It flows freely in PRIME and with good suction in ON, the line just stops filling. Does the system need to be downhill? (Gravity fed) As it is now, the filter on the line sits on top of the carbs making it almost parallel with the ground and not so much downhill. Will that effect the function?
 
Yes get rid of the filter as you don’t need it and it is likely too restrictive. The petcock has one and there are screens in the carbs as well.
 
You must log in or register to reply here.
Back
Top