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Author Topic: Need good solution for leaking carb bowl overflow tube  (Read 1147 times)

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Offline Jayelwin

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Need good solution for leaking carb bowl overflow tube
« on: March 10, 2015, 12:34:36 PM »
So my 350 carb bowl overflow tube has a hairline crack running up the entire tube. I'm wondering what is going to be the best solution to save this carb bowl, the crack is parallel to the tube as if the tube split along about 80% of its length.

Thanks.
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Offline Jayelwin

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #1 on: March 10, 2015, 12:40:47 PM »


Looks like it's split 100% of the length of the tube.
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Offline BobbyR

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #2 on: March 10, 2015, 01:11:50 PM »
The tube is brass which is a good thing. They do crack which is a bad thing. The most permenant fix is to solder the crack closed. You will need to clean the part very well, and using a soldering gun or iron simply solder it closed. You can use the flux used in plumbing if you have some to clear up any oxide you may have missed.

People use JB Weld or plastic fuel line and brass tubing slipped over the existing tube. A reasonably done solder job is permanent and solder is not attacked by gasoline.
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Offline icecoast

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #3 on: March 10, 2015, 01:23:06 PM »
Ive used heat shrink for wiring as a temporary fix and it lasted until i switched carbs which was almost a year. Nothing more permanent than a temporary fix.
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Offline flybox1

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #4 on: March 10, 2015, 01:41:17 PM »
sleeve it with another section of brass hobby tube.
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Offline greenjeans

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #5 on: March 10, 2015, 02:04:23 PM »
Quote from: flybox1 on March 10, 2015, 01:41:17 PM
sleeve it with another section of brass hobby tube.

+1
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Offline Jayelwin

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #6 on: March 10, 2015, 02:07:57 PM »

Quote from: flybox1 on March 10, 2015, 01:41:17 PM
sleeve it with another section of brass hobby tube.

Wouldn't I still have to solder it on?
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Offline flybox1

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #7 on: March 10, 2015, 02:12:01 PM »
Quote from: Jayelwin on March 10, 2015, 02:07:57 PM

Quote from: flybox1 on March 10, 2015, 01:41:17 PM
sleeve it with another section of brass hobby tube.

Wouldn't I still have to solder it on?
not necessarily.  if its split, it has to have expanded a small amount because of this, which should be enough to hold it in place.
I cant remember if its 3mm or 3.5 mm? 
search online for ##mm ID brass hobby tube. 
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

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Offline Stev-o

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #8 on: March 10, 2015, 04:14:10 PM »
I had a similar issue, I just tossed it and used another bowl
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Offline Jayelwin

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #9 on: March 10, 2015, 05:53:22 PM »


I hope it doesn't leak. Stev-o might have the right idea.
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Offline Jayelwin

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Re: Need good solution for leaking carb bowl overflow tube
« Reply #10 on: March 10, 2015, 06:21:34 PM »
Well for 34 bucks I've got a shiny float bowl headed my way from eBay. I think that's probably my best bet.


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