camsore Posted April 18, 2007 Posted April 18, 2007 After having a lot problems getting my 23D to idle, I decided to replace the throttle shaft and bushings. I bought a new shaft from Sandy Lake but they could not get the bushings. I then decided to make them. They took some time but I had fun making them. I was able to remove the old ones by screwing in a 1/4-20 tap a few turns, holding the tap in the vise and tapping the carb with a soft hammer. I then put the carb back on and hit the starter. What a difference it made. The engine now idles like new.
DMedal Posted April 19, 2007 Posted April 19, 2007 can you tell us/show us a little more about making the bushings? -Don
HubbardRA Posted April 19, 2007 Posted April 19, 2007 Larry, I did something similar for a Kohler carb. That carb, for some reason, had a counterbore about 1/8 deep, just outside the hole for the shaft. I made an aluminum plug to press into the counterbore, with a hole for the shaft to come thru. Didn't have to replace the shaft because there was no wear in the area where I put the plug. Worked great. Pressed it in and staked it.
Killer_A-C Posted April 19, 2007 Posted April 19, 2007 Those thread look a little thin.Be careful bolting it back to the intake.
HubbardRA Posted April 19, 2007 Posted April 19, 2007 Like Matt said. I recently stipped the threads out of one of mine. Luckily I had a couple extra laying around.
Scott Salmons Posted April 19, 2007 Posted April 19, 2007 If you strip them out you can easily Heli-coil them.
camsore Posted April 19, 2007 Author Posted April 19, 2007 I turned them on my 6" Atlas Lathe. I used brass, or mybe steel would be OK. I have the dimensions if someone needs them.
TimJr Posted April 20, 2007 Posted April 20, 2007 The Kohler 1" carbs have a throttle shaft repair kit available for them, but you need to talk to a dealer that knows what he is doing because most don't know about it. They are about $30, and come with a new shaft, a bushing, new bowl gaskets etc. The recess mentioned above is where there was originally a felt dust shield on most carbs. You need to reuse the arm on the throttle lever, and brazing it to the new shaft is the safest. As for the Briggs bushings, some of the one piece flo-jets have them available I think, unless it was from a 16hp iron single that I have used in many other carbs. They all seem to have the same OD throttle shaft, just need to trim the bushing length on some. I drilled my one piece flo-jet that did not have any bushings and installed them to get my carb back in shape. Just browse through some Briggs parts manuals for 7hp on up engines from the 1970's and 1980's and you will find them listed with some carbs. Tim
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