If after all this effort, the needle still refuses to come out, then there might be another thing to consider: the hex shoulders on the needle adjustment screw might be rounded out. Remember to use eye protection when you spray that stuff – it is not very eye friendly. You might consider using some spray carburetor solvent and let it soak. If the needle won’t come out it might be because there is some gummed dashpot oil residue. Eventually the needle should come all the way out. It is possible the threads of the seat are still in contact with the needle adjustment screw. If it won’t come out, you might have to use the needle adjusting tool and turn it counterclockwise some more. With the retaining screw out of the picture, gently pull the needle out. However your carburetor might have the spring, so just be aware of its possible existence. This keeps the metering needle screw from turning and allows it to move up and down.Įven though the diagram above says the retaining screw is spring-loaded, I have yet to see one! All the carburetors I have taken apart have not had the spring. The screw has a taper and it fits inside that notch. Note that it points in the direction of the orifice (basically it points in the direction of the retaining screw). Here is a picture of the tools we will need:Ĭloseup of the metering needle still in the piston.īefore we start taking things apart, please note the small notch on the side of the base of the metering needle. If you are using a vise, don’t forget to get some soft jaw liners to keep from marring delicate surfaces.Some spray carburetor cleaner and a few rags or paper towels.If you don’t have one, you can get by with a long hex head tool. A Zenith Stromberg needle adjustment tool.A small Phillips screwdriver or better yet, a Pozidriv bit – to remove the four screws holding the diaphragm to the piston body.A small flat-head screwdriver – to remove the retaining screw.You will need to have several basic tools for this repair: There is a source listed to where you can find the O-Ring. If you are interested in getting the replacement O-ring necessary, please don’t forget to read the “Comments” at the end of this article.
If you have any further insight, please make an entry so others might learn. There are some very interesting remarks there from folks who have contributed their knowledge.
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