needle valve replacement

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Old 03-06-11, 09:20 AM
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needle valve replacement

The bowl type carb on my Briggs and Stratton engine has a needle and seat which I'll be replacing (shown here):
The seat is a reddish orangish rubber looking material, pressed into place. I understand one way to remove the old seat is to hook up some compressed air to the fuel inlet and blow it out? Is there another good way to get it out? Because for one thing I don't have an air compressor.
And, as for installing the new seat, the repair manual says to push it in with the "Briggs and Stratton 19057 bushing driver" which of course I don't have either. What might I substitute for a bushing driver, just a flat-headed punch maybe? I haven't done this before so any advice/suggestions would be appreciated.
 
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Old 03-06-11, 09:53 AM
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You can remove the old seat using an o-ring scribe like this:
2 Piece O-Ring Hook Scribe Set
Or you can try a small nail. As far as installing it, just use a punch that is the size of the seat. That's all the briggs tool is. And just push it in. Don't drive it with a hammer.
 
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Old 03-06-11, 10:23 AM
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Sounds simple enough then. Thanks.
 
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Old 03-06-11, 10:50 AM
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I use my drill index, use one just bigger than the hole of the seat, carefully spin it into the seat by hand then pull.
Like wise to install, use the shank end of a drill the same diameter as the seat.
 
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Old 03-06-11, 11:09 AM
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Originally Posted by BFHFixit View Post
I use my drill index, use one just bigger than the hole of the seat, carefully spin it into the seat by hand then pull. Like wise to install, use the shank end of a drill the same diameter as the seat.
Even simpler! For me anyway. Because I don't have either the right size punch (was gonna have to go buy one) nor a 2-piece O-ring scribe set (so I was gonna try with a small nail instead), but I do have a drill index set.
 
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Old 03-26-11, 06:16 PM
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Yeah that worked just great for me. Thanks BFHFixit.
 
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