How to remove stuck "screw nozzle" from B&S carb?

[Dave A.]

Thanks for the suggestions, guys -- I'll give them a try tomorrow. Right now, I'm soaking it in some antifreeze.

I do have another question about this carburetor. When it comes time to re-assemble it, do I apply any sealant to the float bowl gasket? When I took it apart, there didn't appear to be any sealant on the bottom side of the old gasket, but the top side seemed to be stuck pretty tight to the carb body.

 

[reynoldston]

Thanks for the suggestions, guys -- I'll give them a try tomorrow. Right now, I'm soaking it in some antifreeze.

I do have another question about this carburetor. When it comes time to re-assemble it, do I apply any sealant to the float bowl gasket? When I took it apart, there didn't appear to be any sealant on the bottom side of the old gasket, but the top side seemed to be stuck pretty tight to the carb body.

Install carburetor gaskets dry and surly don't use RTV sealant it doesn't like gas.

 

[Dave A.]

Install carburetor gaskets dry and surly don't use RTV sealant it doesn't like gas.

OK, thanks!

 

[exotion]

Doggone it, I wish I would have found this forum before embarking on trying to replace the nozzle on my carb (the very same model as this one).

Some buddies at work and I have been trying to get the thing out. First, I had been soaking the carb in paint thinner for a couple of days. Then, we sprayed with PB Blaster and tried using a screwdriver which was wide enough to fill the entire slot, but the brass just broke.

Next, we tried drilling the center and using a #1 screw extractor, but again, bits of brass just broke off around the extractor, and then the extractor just spun freely (guess it could have been worse -- at least the extractor didn't break :smile: ).

After that, we figured the only option was to drill it out almost to the threads, and peel it away from the threads. As things now stand, we have it drilled out about 1/4" (see attached photos).

I was going to spend the afternoon carefully drilling and trying to remove the remainder piece by piece. But now, I'm wondering if a better option would be to soak it in antifreeze until tomorrow, as Rivets suggested to the original poster, and then trying to turn it out with some tool, perhaps a larger screw extractor.

Any ideas would be greatly appreciated!

<img src="http://www.lawnmowerforum.com/attachment.php?attachmentid=14048"/><img src="http://www.lawnmowerforum.com/attachment.php?attachmentid=14049"/>

This is where I just buy a new carb

 

[Dave A.]

This is where I just buy a new carb

I may have to resort to that.

To tell the truth, though, I kind of enjoy a challenge like this, of taking something and breathing new life into it (even though I end up doing a lot more cussing than usual during the process :ashamed.

 

[DaveTN]

I may have to resort to that.

To tell the truth, though, I kind of enjoy a challenge like this, of taking something and breathing new life into it (even though I end up doing a lot more cussing than usual during the process :ashamed.

Put this carb on some wood blocks, maybe gently and snugly in a vice just enough to hold it so you can take a flat punch and "tap", not hammer the brass fitting around the outer edge near the threads but NOT hit the threads. A few taps around that will jar the threads loose and you should be able to turn it out as before. I've done this before with success. Hope this helps.

 

[Dave A.]

Put this carb on some wood blocks, maybe gently and snugly in a vice just enough to hold it so you can take a flat punch and "tap", not hammer the brass fitting around the outer edge near the threads but NOT hit the threads. A few taps around that will jar the threads loose and you should be able to turn it out as before. I've done this before with success. Hope this helps.

Dave, thanks for the suggestion. By the time I read it, I had already begun drilling the old nozzle out, using a bit just smaller than the outside diameter of the nozzle, basically hollowing it out, then peeling the remaining edges of the nozzle from the threads in the carb body. Then, I ran a tap of the appropriate size into the threads a couple of times to clean them out. Seems to be OK.


I do have another question, about installing the replacement main nozzle and jet nozzle. Is it customary to use any type of sealant on the threads when installing them, or do you simply turn them in as far as they go? I don't think that there were any signs of sealant on the threads of the old ones, but thought I'd ask.

Thanks!