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#1222544 06/24/2017 5:55 PM
Joined: Dec 2016
Posts: 4
D
New Guy
New Guy
D Offline
Joined: Dec 2016
Posts: 4

Dear Stovebolt, I have a GM Rochester carburetor on my 1950 235 engine and it runs way too rich. The manual gives a measurement to adjust float drop but only shows a paper or sheet metal gauge to adjust the float level itself. Would anyone know where I could get one of those. or trace one or find a dimension to be able to adjust the float?
Also I haven't been able to find a paper air filter to replace the original mesh in the stock air filter. It measures 8" O.D., 6 1/2" I.D. and 1 1/2" high. Any ideas?
Thanks a lot for all the forthcoming help and advice offered in the past. Yours, DaveB4

Joined: Jun 2004
Posts: 8,597
W
Riding in the Passing Lane
Riding in the Passing Lane
W Offline
Joined: Jun 2004
Posts: 8,597
The float level measurement is 1 9/32 in. With the air horn upside down & the gasket in place measure from the gasket surface to the bottom of the float.
There is a hole in the bottom of the carb base . Make sure there is a passage in the gasket to allow that hole acsess to the interior of the intake manifold.
If that is blocked the carb will run rich.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum
Joined: Apr 2014
Posts: 924
U
Shop Shark
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U Offline
Joined: Apr 2014
Posts: 924
Originally Posted by Dave B4
The manual gives a measurement to adjust float drop but only shows a paper or sheet metal gauge to adjust the float level itself. Would anyone know where I could get one of those. or trace one or find a dimension to be able to adjust the float?

As Mr. Wrenchbender says, you need a 1-9/32" device to measure this float level with. Plastic is good. I think I made one from a piece of plastic poster board.


Wrench Fetcher, PhD
Joined: Jan 2014
Posts: 3,677
J
'Bolter
'Bolter
J Offline
Joined: Jan 2014
Posts: 3,677
I use something similar to this:

https://www.amazon.com/gp/aw/d/B000...Pl=1&dpID=41qhjME4xML&ref=plSrch

Measure with the gasket in place.


1951 3100

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