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Zenith over flow
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3rd generation View Drop Down
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Joined: 09 Oct 2025
Location: Iowa
Points: 34 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 3rd generation Quote  Post ReplyReply Direct Link To This Post Topic: Zenith over flow
    Posted: 2 hours 8 minutes ago at 1:39pm
Allis C. I’ve tried it all. Carb has been cleaned with Berryman cleaner. The body also soaked in evaporust. Added inline fuel filter. Float height is good and floats do not hang up on side wall. New gasket under float needle seat body. I even removed the wire clip between the float and float needle. Tried different needles.
Only thing left is buy several needles and seats in hopes I get a good match.
I’ve read the aftermarket carbs have poor performance. Is a Marvel carb an option?
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HudCo View Drop Down
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 4043 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 23 minutes ago at 2:24pm
does the float leak?    boil it to see if it bubbles  or hisses
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Joined: 09 Oct 2025
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Points: 34 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 3rd generation Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 13 minutes ago at 2:34pm
No I checked that also. If I blow into an empty carb bowl it holds holding upside down. As soon as it overflows I disconnect fuel line from carb and attach a hose and blow it appears to hold but under gravity feed it overflows as soon as the bowl fills up with fuel valve open. I measured the original needle to be a few thousands larger than the new needle thinking it gets kicked to side of dead center into seat hole. Sad because this tractor has been completely taken apart and overhauled from lower drive to engine.
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Joined: 08 May 2020
Location: Idaho
Points: 1551 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 6 minutes ago at 3:41pm
Originally posted by 3rd generation 3rd generation wrote:

... under gravity feed it overflows as soon as the bowl fills up with fuel valve open...

Methinks the float doesn't float enough Confused
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