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m/s carb running over

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steve fischer View Drop Down
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Joined: 11 Jul 2011
Location: sleepy eye mn
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    Posted: 14 Jan 2020 at 10:13pm
have a carb on a 175 that I can not get to quit running over , I have o/h  100's or carbs , but I think I have the screws on this one  worn out from taking apart , new needle and seat ,float later , has clip on needle , and spring under float to help close , takes about one hour till it starts to drip , I have taken the top off and turned upside down and hooked up to fuel line does not leak , put carb together and it leaks can watch inside the choke end with a light and mirror and can see it leak over by nozzle , it has a plastic venture and has a line in bottom not cracked and lip turned up , any help carb number TXS-928
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
Location: Andover, NJ
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 7:38am
One thing to watch on the large bore Marvels, is make sure the float pontoons are not bent in just a fuzz to where one or both of the pontoons will contact the inside wall of the float bowls hanging up the float. Looking at the floats from the front, if they're bent in just a tiny bit, they can interfere with the inside wall of the float bowls hanging up the floats and causing a flooding condition.  HTH
Steve@B&B
39'RC, 43'WC, 48'B, 49'IB, 49'G, 50'WF, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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steve fischer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve fischer Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 7:56am
I have changed floats  and have checked side clearance turn upside down and can hear float move have set float drop tab
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bradley6874 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bradley6874 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 8:13am
Take the bowl off turn it upside down hook it to the gas line turn it on see if gas dosent come out from the wrong place i had one i belive it must have froze at some point had internal crack
You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul
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Alvin M View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alvin M Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 8:19am
Make Sure You Have The Gasket Under The Main Fuel Nozzle
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Sugarmaker View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sugarmaker Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 9:27am
Steve Fisher,
I had advice from Steve B&B that I did not do when I had my carb apart. And it could be part of your problem? He recommends cleaning the passages and threads and seats real well with soft bristle bore brushes. He mentioned that is can cause a leak path past the seals/seats. Just a thought. Good luck. I have not thought about the pontoons being tweaked. Let us know what you find out.

Regards,
 Chris
D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Ford Jubilee, IH TD6 Many IH Cub Cadets
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steve fischer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve fischer Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 6:35pm
found it , I took the bottom of a different carb put it on and no leak , well now I am pi##ed , went back to bottom and found the gasket on nozzle split when putting in , something so small ,so Alvin M must of seen before thanks for all the help
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Sugarmaker View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sugarmaker Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2020 at 6:49pm
Steve,
 Great that you found the issue. Thanks for the update too.
 Regards,
 Chris
D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Ford Jubilee, IH TD6 Many IH Cub Cadets
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steve fischer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve fischer Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2020 at 11:11am
must have crack ,went in shop run over again ,looking for different carb txs-928 , took carb off of my tractor and is fine , put on other tractor and ran over , do not want zenith from 170 , thanks 
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