HELP WITH A JOHN DEERE B(posted in tractor talk also)

Go to the Roberts Carburetor web site and look up the information he has on carburetors for your tractor. I found it quite helpful when learning about how to set them up and clean them. The drill bits you need to properly clean them with are available on his web site or on ebay. There is another fella on the forum who has a website full of information on how to clean two cylinder carbs and to test them when you have your tractor running. Also, check your fuel line, gas tank, fuel shutoff valve for any obstructions. I doubt that is the problem. Have you taken the carb completely apart and cleaned it? Pull your spark plugs out and turn the engine over by hand or a big wrench. Put you finger over each plug hole. Does the engine try to suck your finger into each plug hole and blow it out? Have you adjusted your valves to the proper gap when cold? Make sure every passage is clean on your carb and if you have any wear on your throttle plate, then go ahead and change it out. You will be glad you did once you get your tractor running right as this will help it to idle properly.

Scott

Go to the JD-H Restoration Site (below), and once there, look left -- scroll down to CARBURETORS. Open that one. Toward the end, there is a no-wrench test you can perform to learn if both the IDLE path and LOAD path are open. (PatB)

• Restoration Site, JD-H

The basic kit you generally receive is a needle valve and seat, some gaskets, and a maybe new throttle shaft. Like the guys have suggested, you'll likely need to go in further to solve your idle problem.

One thing about probing in a carburetor with those drill bits...I suggest that unless you really know where you are going you try some soft wire first. It can't hurt, it might move the rusty slug, and if it doesn't, you can use the drill bits, in your finger tips first. Had a fella a while back go at it with a fast drill and it went right through the carburetor port wall.

You're going to need to remove ALL of the brass plugs to gain access to all of the ports. Two are inside the bowl area. Those plugs were placed there as plugs after the body was drilled and machined. I would suggest that you pull the central nozzle as well as there is a good chance that there is dirt and debris trapped in there if you have slugs plugging the ports. If you don't, another might be near ready to break loose right after you re-install it.

Check your shaft bushings, too. Air getting in around the throttle shaft can cause idle problems, though probably not as severe as you describe. Roberts can supply the brass plugs, too. A fresh carburetor looks really nice when it's dressed out with new outer hardware, and the next time they'll be easier to remove.

Frank

Frank