My carburetor experience

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Plumberspieco
Posts: 29
Joined: Sun Apr 18, 2021 10:35 pm
Zip Code: 44024

My carburetor experience

Postby Plumberspieco » Mon Aug 16, 2021 7:56 pm

So like anything else after finding an A, Impulse buy thread. I found a 1965 cub that hadn’t run in 30 some years and just had to get it. Before picking it up I read all the info I could on various carburetor scenarios. Trying to get ahead of the game I rolled the dice on one of the knock off carbs. Figured for what it costs I’m not out much if it doesn’t work out.

I get the cub and a new battery, clean up the points, do plugs, pull the tank off to give the acid treatment and get a temp fuel tank set up. Got it to burp and sputter and that’s about it. Pull the carb which ends up having a pretty well warped top half. Throw the new carb on and it leaks. Ha go figure. Set the float which was way out of adjustment, not sure about the needle having a spring loaded ball on the end but maybe it’s a better design. Three days of farting around and I still can’t get it to stop leaking. Mind You I had also ordered a rebuild kit for the original. I stop procrastinating and make a straightening jig and am pleased with the results. Go to put the seat in and have the dreaded problem of it being quite tight and only going in so far before coming to a screeching halt.

Now when researching the needle and seat problem I read a quite a bit about avoiding this one or that one, get it from here not there or try the Kohler one. Then the one that has too many threads and bottoms out. Seems that last one was my issue. I check the bore depth and the length of the seat and it appears to be acceptable. Well I’ll be darned if this thing really doesn’t have too many threads. Not that the threaded portion is longer and bottoms out at the bottom of the bore but it is 26tpi not 24tpi. Now I may have missed this somewhere and apologize for repeating it but I’ll add some pics to my finding to clarify what too many threads really means.
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So the old needle and seat went back in with one new main gasket and she fires up and runs as good as it can get. As far as the new carb goes I took it apart again and the plastic float separated at the seam. Enough of that! I spent far less time straightening the old carb and putting a gasket in it with greater satisfaction to boot.

Plumberspieco
Posts: 29
Joined: Sun Apr 18, 2021 10:35 pm
Zip Code: 44024

Re: My carburetor experience

Postby Plumberspieco » Mon Aug 16, 2021 8:08 pm

Oh how rude of me not to show off the new acquisition [attachment=1]59ABF20C-CAC5-4FAA-9BE9-46BA111605F6.jpeg
Attachments
9E1E6CA2-D3CA-47AD-9EEC-2C80518B8097.jpeg
In daylight
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59ABF20C-CAC5-4FAA-9BE9-46BA111605F6.jpeg
As found
59ABF20C-CAC5-4FAA-9BE9-46BA111605F6.jpeg (36.06 KiB) Viewed 401 times

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Don McCombs
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Re: My carburetor experience

Postby Don McCombs » Mon Aug 16, 2021 10:03 pm

Plumberspieco wrote:Mind You I had also ordered a rebuild kit for the original.

Where did you get your rebuild kit?
Don McCombs
MD, Deep Creek Lake

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Plumberspieco
Posts: 29
Joined: Sun Apr 18, 2021 10:35 pm
Zip Code: 44024

Re: My carburetor experience

Postby Plumberspieco » Mon Aug 16, 2021 10:23 pm

Forgot to mention I got both products off evilbay.
I knew it was going to be a crap shoot and know better now. Here’s pics of the plastic float from the new carb, and the wrong 26tpi seat and needle from the carb kit.
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92BF265E-30BA-4D4E-8C4A-68E3C0897629.jpeg
92BF265E-30BA-4D4E-8C4A-68E3C0897629.jpeg (17.34 KiB) Viewed 369 times
76E4B37D-9E64-428C-AC2E-6C4CF86AF5B5.jpeg
76E4B37D-9E64-428C-AC2E-6C4CF86AF5B5.jpeg (19.09 KiB) Viewed 369 times

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Stanton
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Re: My carburetor experience

Postby Stanton » Tue Aug 17, 2021 6:41 am

Would recommend a reputable place to get carb (or any) parts. One of our sponsors, TM Tractor, or McDonald Carb are solid choices for future carb kits.

Glad to hear you got it fixed.
Stanton
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Plumberspieco
Posts: 29
Joined: Sun Apr 18, 2021 10:35 pm
Zip Code: 44024

Re: My carburetor experience

Postby Plumberspieco » Wed Oct 27, 2021 2:55 pm

Well now after reading a few current threads I checked out viewtopic.php?f=1&t=108040&start=45
I see that my Chinese carb I got doesn’t have the vent hole drilled either. Hopefully whenever, if ever I fix this carb it’ll work properly.

tst
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Re: My carburetor experience

Postby tst » Wed Oct 27, 2021 6:35 pm

brass float is what you want, most plastic does not survive the gas we have today

Clemsonfor
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Re: My carburetor experience

Postby Clemsonfor » Thu Oct 28, 2021 1:35 pm

If they would use the correct plastic it would. All gas tanks these days temporary and automotive types are plastic and they survive. But the correct kind is key here.


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