Bogging/dying when braking

[68C101775]

Hey guys new to the forum! Looking for some help. I have a 68 c10 with a original 250/Rochester monojet, drum brakes all around w no brake booster so no vacuum connected to the brakes at all. Got the truck driving and idleing well but when I hit the brakes it bogs way down and if I hit them hard enough the truck dies. Doesn’t seem to happen at all in reverse. Any ideas? Thanks.
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[geezer#99]

Check the float level.
Could be too high.

[68C101775]

Originally Posted by geezer#99

Check the float level.
Could be too high.

I did just rebuild the carb. Is there a measurement I can use to set it? I’m assuming I just bend it gently?
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[geezer#99]

I don’t know the measurement.
Didn’t the carb kit come with that?
Try dropping it an 1/8 inch.

[68C101775]

Originally Posted by geezer#99

I don’t know the measurement.
Didn’t the carb kit come with that?
Try dropping it an 1/8 inch.

The kit didn’t come with one. Where would I measure it from?
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[geezer#99]

I found the number in my motors manual.
It’s 1/4 inch.
Measured from the top of the casting to the toe of the float.
that means from the carb body to the end of the float.

[68C101775]

Originally Posted by geezer#99

I found the number in my motors manual.
It’s 1/4 inch.
Measured from the top of the casting to the toe of the float.
that means from the carb body to the end of the float.

Awsome thanks a ton. Do you measure with gas in the bowl or just push on it? Wanna make sure it’s in the correct position
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[geezer#99]

This should help.



https://www.carburetor-blog.com/know...monojet-float/

[geezer#99]

Originally Posted by 68C101775

Awsome thanks a ton. Do you measure with gas in the bowl or just push on it? Wanna make sure it’s in the correct position
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It’s a dry setting.

Did you use a new float?

[68C101775]

Originally Posted by geezer#99

It’s a dry setting.

Did you use a new float?

No reused the old float
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[geezer#99]

If the float adjustment doesn’t help it might be a wet float. They get fuel in them and cause that type of problem you have.

Floats available here.


https://quadrajetparts.com/monojet-f...c-240_244.html

[geezer#99]

You know there’s a kinda unwritten rule here!
New guys gotta post pics of their truck!

[68C101775]

Originally Posted by geezer#99

You know there’s a kinda unwritten rule here!
New guys gotta post pics of their truck!

Awsome thanks for the help, I’ll dig into the carb and see what’s up. And thanks for the heads up I’ll make a post of the ole girl
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[68C101775]

Originally Posted by 68C101775

Awsome thanks for the help, I’ll dig into the carb and see what’s up. And thanks for the heads up I’ll make a post of the ole girl
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My float was a lot lower than 1/4 in when I just checked. Any ideas for it bogging down and dying after being revved up as well?
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[geezer#99]

Lower might mean bad float.

[Steeveedee]

Originally Posted by 68C101775

My float was a lot lower than 1/4 in when I just checked. Any ideas for it bogging down and dying after being revved up as well?
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You had the carb upside down when you checked the float level, yes?

[68C101775]

Originally Posted by Steeveedee

You had the carb upside down when you checked the float level, yes?

No I had it sitting on bench and I pushed on the float where the needle sits to seat it and measured from there. I also haven’t been able to find the measurement spec required I didn’t get instructions w the rebuild kit.
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[68C101775]

Originally Posted by geezer#99

Lower might mean bad float.

Reset the float level still the same problem. Looks like fuel seeping out and saturating the gasket between the top and the bowl. Any ideas if it’s not the float?