carb float

Valente · Mar 12, 2020

I have a international 2405B 4 cylinder gas tractor, does anybody know the correct specs and procedure for the float adjustment

rustred · Mar 12, 2020

if you don't have the spec, take the carb bowl with the float and turn it upside down so float is resting on the needle. then you "eye" it up so the float is sitting level. to adjust you may have to bend a tang or float arm slightly. its been done that way in garages for ages. nowadays people are getting scared of carburators.

Mike M · Mar 12, 2020

I agree, most of them are about level at the spec. anyhow.

Moonlite37 · Mar 12, 2020

When I worked at an Allis Chalmers dealer's shop, we repaired all makes. That is the way we set all floats even small engine floats

47fivewindow · Mar 12, 2020

I too have been getting away with close to level forever on everything. The specs were sometimes in 32nd of an inch, I never could imagine that made much difference.

timcasbolt · Mar 12, 2020

(quoted from post at 14:34:43 03/12/20) I too have been getting away with close to level forever on everything. The specs were sometimes in 32nd of an inch, I never could imagine that made much difference.

You're right. As long as the needle opens before the bowl gets empty and closes before the bowl gets full, you're good.

Stephen Newell · Mar 12, 2020

You turn the top of the carb upside down and adjust the float where it's level with the top carb with the needle closed.

Mike(NEOhio) · Mar 12, 2020

What timc said is true to a point but it has to maintain a certain level in the bowl to run right under load. If the level is too low it takes more vacuum to draw it up to the nozzle because of the extra distance.

jeffcat · Mar 13, 2020

I agree with the knowledge of the folks on here. From garden tractors and tiny generators all the way up to big bad old trucks and tractors. Hold the carb upside down and the float should be dead level. I hook a little rubber or vinyl hose to the inlet of the carb and gently blow into it. You should be able to just gently lift the rear of the float and you will feel the pressure drop. Otheres have said about carefully adjusting the little tang on the older style brass floats. This is very very critical to note. Do NOT EVER push down on the float. You just potentially messed up the float needle valve and or the seat it goes into. It will most likely be a constant leaker. Take the float back out and use a good pair of needle nose plyers. All of the new style carbs have plastic floats. I have never needed to adjust them. Have fun.

carb float

Valente

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rustred

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Mike M

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Moonlite37

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47fivewindow

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timcasbolt

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Stephen Newell

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Mike(NEOhio)

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jeffcat

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