Carburator dust seal problem :(

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Postby Rick Prentice » Thu Sep 27, 2007 9:58 am

Choke shaft dia.- slipped choke shaft into...then 3/16 HS drillbit into. Same size..3/16 then?
seems to be another difference. All my housings that I checked are 1/4"(.250) and the shafts are 1/4" too. Just enough +/- clearance for the shaft to slide in.

Rick
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Postby Into Tractors » Thu Sep 27, 2007 10:21 am

Rick(billyandmillie) wrote:
Choke shaft dia.- slipped choke shaft into...then 3/16 HS drillbit into. Same size..3/16 then?
seems to be another difference. All my housings that I checked are 1/4"(.250) and the shafts are 1/4" too. Just enough +/- clearance for the shaft to slide in.

Rick


:evil: :evil: I was afraid of that, when I get home tonight I'll cross reference the different part listings I have in the PDF files, but I was guessing that was going to be the case?

Chalk one up for the other team :?:
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Postby Chris Todd » Thu Sep 27, 2007 10:25 am

Rick,
My shaft is definitly the size of a 3/16 drill bit. I tried a 1/4 and that is way to big. The choke shaft is also a bit smaller dia than the throttle shaft? I don't have time to pull the t. shaft right now as "The Big R" is calling for a noon start. Going to be a wet dog today :cry: When I get home late tonight I'll take some detailed pics with the bits, etc.
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Postby Into Tractors » Thu Sep 27, 2007 10:31 am

Well, I'm not giving up that easily. We'll figure something out, might have to start producing an EFI system for the Cub at this rate.

Need to ponder on this some more,,,,,,,,,Guess I need to make a trip to the Mom & Pop lawnmower repair shop and chat with the owner about B&S carbs? He might have some :idea: or insight :?:
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Postby Don McCombs » Thu Sep 27, 2007 10:37 am

Well, you could always ream the 3/16 holes out to 1/4, add a later choke shaft and make it completely a later base to match the later throttle body. Would save searching for oddball parts. :wink:
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Postby Rick Prentice » Thu Sep 27, 2007 11:46 am

I know from now on at the shows, I'll be looking for these unique carbs, especially on those original '47 cubs :D

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Postby Chris Todd » Thu Sep 27, 2007 11:35 pm

Here are some more pics as promised showing 1/4" in throttle bore. 3/16 in choke bore. And 3/8 in choke cage bore.

Image

Image

Image

Image

Image

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Postby Into Tractors » Fri Sep 28, 2007 6:28 am

Chris, going to send you a PM. Got another :shock: Stupid idea that I was thinking about last night that might work?

Warning, you'll "Probably" need a drill press, but not to modify the carb, but to modify an item to "Use" as a retainer?
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Postby Rick Prentice » Fri Sep 28, 2007 7:04 am

Stupid idea
It must be stupid if you won't share it with the rest of us after all we've been through :D :D :D

C'mon Mike, don't be chicken :shock:

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Postby Rick Prentice » Fri Sep 28, 2007 7:07 am

You better share it or I'll ask JimT to post a pic of a 1 legged chicken running :shock: :shock:
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Postby Chris Todd » Fri Sep 28, 2007 7:07 am

LOL.....Might Work :?: I'll let Mike post it (i'm sure he will)
"Mike you have the floor" :applause:
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Postby Into Tractors » Fri Sep 28, 2007 7:09 am

Rick(billyandmillie) wrote:You better share it or I'll ask JimT to post a pic of a 1 legged chicken running :shock: :shock:


Rick, Check your inbox, "Constructive Feedback" appreciated :shock: :?:
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Postby Into Tractors » Fri Sep 28, 2007 7:16 am

I want to have Chris try it, I thought it over last night as I was soldering up the 6V to 12V up-convertor I'm designing. This is the circuit I told you & George about at CubTug and Rudi has shown some interest in it now.

Just so happens I "Spilled" some IC chips off my bench onto the floor last night, and saw one of the little "Washers" laying on the floor under my bench. The idea popped into my head, but it was almost midnight so I didn't get a chance to try it yet.

Chris, by the way, you might have to make "Two Sizes" of the custom retainer using two of the items, of course 2 different sized holes in the jig to form each one? That way the 2 piece's might "Sit Inside" each other?

Be sure to let me know if you try it, when I get home from work today I might give it a shot myself if you haven't already tried it?

Rick, if the idea works, I'll be sure to share it. Things have been a little hectic at home & work, and my digital camera is on the fritz too.
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Postby Rick Prentice » Fri Sep 28, 2007 7:26 am

I think it might just work :D Sorry for posting such a threatening statement
You better share it or I'll ask JimT to post a pic of a 1 legged chicken running
but a guy has to do, what a guy has to do :D :D so I brought out the big guns :wink:

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Postby Chris Todd » Fri Sep 28, 2007 7:28 am

Rick,
Check your pm in a minute. I have a ? about brazing cast. Think you and Mike can solve it for me. "Poor Rookie" :?
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