nodoo_s
New member
VIPERKING, if you clean your carbs and it still does it check to make sure your choke is closing all the way, first make sure your cables when the ckoke off has slack in it. Mine did the same thing and what i found was even though the choke looked closed when i pushed on the little nipple on the carbs that slides in and out to open and close the choke it was staying out just a little bit. i sprayed some wd40 on it and now it idles like a charm. i was fighting with this for 3 weeks. just another quick look and push it with your finger and you will be able to tell right a way if that is your problem.
Last edited:
chitownpete@yahoo.com
New member
My Viper wouldn't idle, I cleaned the pilot jets and it starts and idles better than when I bought it new. The pilots were apparently partially plugged when new and got worse every year until this year when it wouldnt idle.
Much good advice here, please take it as that . . .
One of the problems with using SeaFoam on a sled that has been stored with gas in the carb is that it frees up residue but it does not control where it goes. Many times small particles get stuck in the fuel circuit passages and jets. I have seen many a carb have a plugged fuel circuit from adding SeaFoam to the tank after gas has been left in it for a long period of time. Don't get me wrong SeaFoam is great stuff, and I use it in many things. However, once a fuel circuit is plugged the SeaFoam doesn't flow through it to continue to clean it. Also some particles just don't break down small enough.
There is no substitute for a good carb cleaning. When you clean your carbs take the pilot jets out and look through them (use a magnifying glass if your vision is as bad as mine). I am betting you will not be able to see light through it. Some carb cleaner and compressed air will likely take care of it. btw: You should inspect all of the jets and needles when cleaning the carbs. Just hosing down with carb cleaner, and blowing off with compressed air is not a very good cleaning job.
To answer your questions earlier . . .
Different fuel circuits (and thus jets. etc.) come into play based upon throttle position.
The main jet is the largest (not counting the starter circuit) fuel circuit and thus the least likely to plug. However it only comes into play at higher throttle positions. The pilot jet is the smallest fuel circuit and thus the most likely to plug up. It comes into play at idle and just above.
One of the problems with using SeaFoam on a sled that has been stored with gas in the carb is that it frees up residue but it does not control where it goes. Many times small particles get stuck in the fuel circuit passages and jets. I have seen many a carb have a plugged fuel circuit from adding SeaFoam to the tank after gas has been left in it for a long period of time. Don't get me wrong SeaFoam is great stuff, and I use it in many things. However, once a fuel circuit is plugged the SeaFoam doesn't flow through it to continue to clean it. Also some particles just don't break down small enough.
There is no substitute for a good carb cleaning. When you clean your carbs take the pilot jets out and look through them (use a magnifying glass if your vision is as bad as mine). I am betting you will not be able to see light through it. Some carb cleaner and compressed air will likely take care of it. btw: You should inspect all of the jets and needles when cleaning the carbs. Just hosing down with carb cleaner, and blowing off with compressed air is not a very good cleaning job.
To answer your questions earlier . . .
Different fuel circuits (and thus jets. etc.) come into play based upon throttle position.
The main jet is the largest (not counting the starter circuit) fuel circuit and thus the least likely to plug. However it only comes into play at higher throttle positions. The pilot jet is the smallest fuel circuit and thus the most likely to plug up. It comes into play at idle and just above.