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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2016 Posts: 4 New Guy | | New Guy 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 Riding in the Passing Lane | | Riding in the Passing Lane 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 SuperIn the Gallery Forum | | | | | Joined: Apr 2014 Posts: 924 Shop Shark | | Shop Shark Joined: Apr 2014 Posts: 924 | 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 'Bolter | | 'Bolter Joined: Jan 2014 Posts: 3,677 |
1951 3100
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