Carb flooding

[Dean Plute]

I have a 1995 Ford 4000 4 cylinder gas engine. A few months ago had the carburetor, Marvel Schbler TSx-813 rebuilt. For a few months the reactor ran good. Went to start.it the other day an had a serious flooding problem (had gas coming up into the exhaust). Contacted the shop and they said pull the bottom off the card as the float needle may be clogged. Did that and noticed the float was dropping causing the needle to drop to far and was cocked between the needle seat and the top of the float flange. Tried to adjust the flange but same thing keeps happening. Doing some research I noticed that some needle floats have a retaining clip for the needle. But the one I have in the carburetor does not (see attached photo). Is it the wrong needle float or does the float itself need to be replaced? If it is the wrong needle float what is the correct one. The other numbers/letters on the carburetor ID plate are 64F.

 

[wore out]

I have a 1995 Ford 4000 4 cylinder gas engine. A few months ago had the carburetor, Marvel Schbler TSx-813 rebuilt. For a few months the reactor ran good. Went to start.it the other day an had a serious flooding problem (had gas coming up into the exhaust). Contacted the shop and they said pull the bottom off the card as the float needle may be clogged. Did that and noticed the float was dropping causing the needle to drop to far and was cocked between the needle seat and the top of the float flange. Tried to adjust the flange but same thing keeps happening. Doing some research I noticed that some needle floats have a retaining clip for the needle. But the one I have in the carburetor does not (see attached photo). Is it the wrong needle float or does the float itself need to be replaced? If it is the wrong needle float what is the correct one. The other numbers/letters on the carburetor ID plate are 64F.

I'm NOT sure what you mean by "tried to adjust the flange".

Are you bending the tang on the float that sets "float drop"?

 

[Fritz Maurer]

If it had been running all this time, you probably got a speck of dirt stuck in the needle/seat area.

The bowl was probably preventing it from dropping too far, and allowing it to work up to now.

Make sure all your filters are intact and clean out the fuel system and try again.

 

[Dean Plute]

I'm NOT sure what you mean by "tried to adjust the flange".

Are you bending the tang on the float that sets "float drop"?

I tried to bend up the forward edge of flange I did not see a tang on the back of the flange like you show on your photo. Could that be why the float is dropping to low allowing the needle to drop to low and wedge against the flange.

 

[Dean Plute]

If it had been running all this time, you probably got a speck of dirt stuck in the needle/seat area.

The bowl was probably preventing it from dropping too far, and allowing it to work up to now.

Make sure all your filters are intact and clean out the fuel system and try again.

When i took.it apart to see what the problem was I cleaned all those out. But the float is dropping to low then the needle slides down to far and pins.between thw float flange and the needle seat then thw float will not rise like it should.

 

[joeysmith]

With the bowl off the float an needle will drop to far even if adjusted properly

 

[Dean Plute]

With the bowl off the float an needle will drop to far even if adjusted properly

If the tang is not on the back of the flange would that let the float drop to much even if thw bowl.is removed.

 

[rustred]

With the bowl off the float an needle will drop to far even if adjusted properly

It is not supposed to . Float drop and float level is two separate adjustments. The float is not to sit on the bottom of the bowl when set correctly. That is why so many have flooding problems.

 

[Dean Plute]

It is not supposed to . Float drop and float level is two separate adjustments. The float is not to sit on the bottom of the bowl when set correctly. That is why so many have flooding problems.

I have read the measurement for float level is supposed to be 1/4". What is the measurement for float drop?

 

[Charles in Aus.]

A remote possibility; is there a pin hole in one of the boats causing it to drop skewed ?
Easy to check , put the float into really hot water , if there is a microscopic hole expanded air will leak out and cause a stream of tiny bubbles .
Yes it's new , I had a new cylinder liner for a Ferguson TED20 come to me with a hole in the wall .

 

[MarkB_MI]

If the carb was working for several months, then there should be no reason to adjust the float. Like Charles said, check for a pinhole leak in the float. The float might have already been bad when they rebuilt the carb and it just took awhile for enough gas to leak into the float for the carb to malfunction.

Hold the float up to your ear and shake it; you should be able to hear gas sloshing around inside if there's a leak.

 

[Dean Plute]

I'm NOT sure what you mean by "tried to adjust the flange".

Are you bending the tang on the float that sets "float drop"?

Another question, is that tang used to adjust the float height or the float drop? I have read in the forum that both height and drop needto be set.

 

[Jim.ME]

Here is a link to a Marvel Schebler carb manual. Study the TSX section, it should help you with where and how to make adjustments of the floats (and other parts of the carbs). Similar info should be in your tractor service manual.

Marvel Schebler DLTX & TSX manual

 

[Fritz Maurer]

When i took.it apart to see what the problem was I cleaned all those out. But the float is dropping to low then the needle slides down to far and pins.between thw float flange and the needle seat then thw float will not rise like it should.

My point is that the float didn't suddenly start dropping too far and jam the needle if it has been running several months as you say.

Unless the float sunk, or you drained the bowl, there would be no reason for the float to be anywhere else but up against the needle, trying to shut off the gas.

If the needle jamming because of the float travel really was the problem, it would have been apparent as soon as you turned the gas on the first time..... not several months later.

Evidently the float was resting on the bottom of the bowl and prevented the needle from falling out when you installed it. Incorrect setting to be sure , but it's not the reason you came out to a flooded motor one morning.

If you cleaned the fuel system as stated, you may have already solved the problem.

 

[joeysmith]

It is not supposed to . Float drop and float level is two separate adjustments. The float is not to sit on the bottom of the bowl when set correctly. That is why so many have flooding problems.

Correct
Dunno what I was thinking last night
Lol

 

[Stephen Newell]

It's probably the float adjustment however do you have a fuel pump or is the carb feed by gravity? I have had a fuel pump start putting out too much fuel pressure before causing the carb to flood.

 

[Dean Plute]

It's probably the float adjustment however do you have a fuel pump or is the carb feed by gravity? I have had a fuel pump start putting out too much fuel pressure before causing the carb to flood.

It is gravity fed.

 

[UncleTom]

Dont for get to use a Q-tip in a drill with carb cleaner on the seat where the float needle normally sits. It fixes a lot of carbs.

 

[Dean Plute]

Here is a link to a Marvel Schebler carb manual. Study the TSX section, it should help you with where and how to make adjustments of the floats (and other parts of the carbs). Similar info should be in your tractor service manual.

Marvel Schebler DLTX & TSX manual

Thank you I will ssve that link.

 

[Dean Plute]

Dont for get to use a Q-tip in a drill with carb cleaner on the seat where the float needle normally sits. It fixes a lot of carbs.

Cool tip never thought of that. Thanks