needle valve replacement
#1
03-06-11, 09:20 AM
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.
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.
#2
03-06-11, 09:53 AM
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.
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.
#4
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.
Like wise to install, use the shank end of a drill the same diameter as the seat.
#5
03-06-11, 11:09 AM
Originally Posted by BFHFixit
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.
