I'm Stuck!! I have an old but in very good condition chainsaw. Its a Craftsmen

HI I have an old craftsman chainsaw. It has a Welbro carb that seems to be everywhere. I couldn't find any numbers on it. I totally rebuilt it replacing the diaphragm, needle valve, and flapper valves on the other side, cleaning and spraying out all the holes as I went. I also replaced the fuel filter, fuel lines and primer ball. When I first looked at it the fuel lines were completely broken into small pieces. I'm not sure if I put the primer line and fuel line on the carb on the right brass tubes as I had no reference when I started. My exneighbor's son last "used" it some years ago and much to my dismay the adjusting screws were tightened all the way closed so I also don't know where they should be set. I read one post to set them at 1 1/2 for the low and 2 for the high. when I got it back together it would fir but not run. Now it does neither. Any help out there?

 

John welcome to the forums. I have started a thread for you. Perhaps this is your first visit to any forum and you weren't aware but in the future please start your own thread and never post a question to a sticky as you did.

 

Go here, do this:


http://www.doityourself.com/forum/ou...-settings.html

 

The line from the tank with the filter goes to the fitting closest to the center of the carb. The, a short line goes from the other fitting to the suction side of the primer bulb. Then, a line goes from the pressure side of the primer to the fuel tank. Make sure this is how you have it before checking other stuff.

 

Thank you very much,, For some reason the fuel line is blocked so the primer is just pressurizing the fuel tank. I am going to take it apart once again and see what I can find

 

Your right this is my first try at forums. thank you for the patience.

 

I had a blockage in the brass hole where the needle valve is in the carb. Got that cleared. still won't start. When I pump the primer bulb I get fuel coming out of the carb. But isn't the primer bulb supposed to have a little gas in it also? Do I have another hole clogged up somewhere?

 

If you are getting gas coming out the throat of the carb when you prime it, something is wrong. It's not supposed to do that. The lines are connected wrong or a check valve isn't working or something along those lines.