All,
I am currently in the process of getting my carb fine tuned and am sealing my very old float but also want to be sure I am running it off of the right settings. I have a U&J carb and obviously information on these is fairly limited. Does anyone happen to know how high for me to set the float level and about how much my float should weight to perform properly? I have been fighting this thing for the last couple of weeks.
Thanks,
Bryce
Where to set float level....
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- Posts: 238
- Joined: Sun Jan 06, 2019 12:09 pm
- First Name: Philip
- Last Name: Thompson
- * REQUIRED* Type and Year of Model Ts owned: 1924 touring
- Location: Graham NC
Re: Where to set float level....
i set mine as high as possible without leaking
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- First Name: craig
- Last Name: leach
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- MTFCA Number: 26647
Re: Where to set float level....
Hi Bryce,
The purpose of the float is to maintain a level of fuel to operate the systems in the carb. Idle, intermediate, main jet & accelerator pump
(when applicable ) the higher the float level the richer the none adjustable systems will be & the lower the leaner. As a rule of thumb the
float should be level with the top of the carb body when held upside down with the float resting on the needle & seat. You should be able to
suck on the fuel inlet and pull a vacuum in this position. If sealing the float has added weight to the float you may want to add a little bit to
that measurement.
Craig.
The purpose of the float is to maintain a level of fuel to operate the systems in the carb. Idle, intermediate, main jet & accelerator pump
(when applicable ) the higher the float level the richer the none adjustable systems will be & the lower the leaner. As a rule of thumb the
float should be level with the top of the carb body when held upside down with the float resting on the needle & seat. You should be able to
suck on the fuel inlet and pull a vacuum in this position. If sealing the float has added weight to the float you may want to add a little bit to
that measurement.
Craig.
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Topic author - Posts: 100
- Joined: Wed Dec 29, 2021 5:09 am
- First Name: Bryce
- Last Name: S
- * REQUIRED* Type and Year of Model Ts owned: 1919 Speedster
- Location: Central Indiana
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- Board Member Since: 2021
Re: Where to set float level....
Thank you! I'll be double checking it.Craig Leach wrote: ↑Wed Mar 08, 2023 1:33 pmHi Bryce,
The purpose of the float is to maintain a level of fuel to operate the systems in the carb. Idle, intermediate, main jet & accelerator pump
(when applicable ) the higher the float level the richer the none adjustable systems will be & the lower the leaner. As a rule of thumb the
float should be level with the top of the carb body when held upside down with the float resting on the needle & seat. You should be able to
suck on the fuel inlet and pull a vacuum in this position. If sealing the float has added weight to the float you may want to add a little bit to
that measurement.
Craig.
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- Posts: 583
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- First Name: Bruce
- Last Name: Compton
- * REQUIRED* Type and Year of Model Ts owned: 1921 Coupe, 1925 Coupe
- Location: Kemptville
Re: Where to set float level....
Bryce; I've done maybe 7-8 of the U&Js and the first one had no float (just the hinge). I bought the black float material from Langs but without knowing the correct dimensions, made a float that was way too thick, like around 5/8-3/4" thick. I set it so the top was level with the body when inverted but had a too lean mixture as the size of the float actually displaced too much fuel and created the low fuel level. I luckily soon found an old original float that was closer to 3/8" thick and trimmed my home-made float to match and that solved the problem.