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Jul 21st, 2025 | | | | Joined: Mar 2014 Posts: 161 Shop Shark | | Shop Shark Joined: Mar 2014 Posts: 161 | In tuning up the 59 235 in my 51 3100 I discovered that the ethanol in the new gas creates a substance in my carb that causes it to clog.I decided to run alcohol free gas and it works.No more carb crud.The problem is this gas is expensive and I have to travel too far to get it so I'm going to try another carb.I noticed that lots of people here use the new gas in their old rigs with no problems.
So what carb can I use without modifying fuel lines/linkage etc?I want a manual choke.Will my current air cleaner work?---Jack | | | | | Joined: Oct 2006 Posts: 1,847 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 1,847 | it wasn't the ethanol. I have had zero problems with ethanol. (except my weed eater) The reason you had crud in your carburetor is you have crud in your fuel system. Alcohol doesn't curdle into goo. There is no reason to change carburetors. Use the E10, it works just fine. | | | | | Joined: Aug 2012 Posts: 1,214 Shop Shark | | Shop Shark Joined: Aug 2012 Posts: 1,214 | My 49 216 w/the notorious Rochester B carb hasn't had any problems w/87 octane E10 gas. Starts and runs nearly flawlessly w/no hesitation.....(knock on wood). I've got approx. 9K miles on it since I rebuilt the carb & head. Your crud is either coming from the fuel system (old gas tank is notorious for this) or your getting it in the gas. Put a good late model inline fuel filter between the tank and fuel pump and a clear filter such as this filter betwwen the fuel pump and carb and try the E10 again. Good luck Dave | | | | | Joined: Mar 2014 Posts: 161 Shop Shark | | Shop Shark Joined: Mar 2014 Posts: 161 | I went through this discussion right here about a year ago. I read that the carb's metal coating wears off over time and the alcohol reacts with the base metal and oxidizes leaving a residue.There even was a picture of the crud. So I cleaned the system and tried alcohol free gas and it worked. No more crud. Put over 3000 miles on it like that.
So was I fed a line of bull before? what's the story here?
I would still like to know what carb other than a rochester g will fit my engine without modifications.
A very confused---Jack | | | | | Joined: Jan 2010 Posts: 4,263 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 4,263 | Here a list from carbking if you decide to try a carter I did an abbreviated list of these once before. This is a complete list taken one by one from the Carter master prints, and includes experimental carbs with numbers assigned, but no production.
THERE ARE DIFFERENCES IN THESE CARBURETORS! THAT IS WHY THERE ARE DIFFERENT NUMBERS!
Some of you have already experienced some of these differences such as the "ported" vs "manifold" vacuum take-off for the distibutor.
Use the list as is, and I would guess few issues. However, changing from one application to another may lead to issues.
At any rate, here is the list:
Jon.
Carter YF carburetors produced for use on Chevrolet
756s – 216 engine aftermarket 1937~1952
787s – 216 engine aftermarket 1937~1952
788s – 235 engine aftermarket 1950~1952
789s – 235 engine aftermarket 1950~1952
890s – 235 engine aftermarket manual choke (number assigned, no production)
891s – 235 engine aftermarket auto choke (number assigned, no production)
964s – 216 engine aftermarket manual choke 1937~1952
965s – 216 engine aftermarket auto choke 1937~1952
966s – 235 engine aftermarket auto choke 1950~1952
967s – 235 engine aftermarket manual choke 1950~1952
2008s – 216 engine aftermarket 1937~1952
2046s – 206 engine aftermarket 1932~1936
2100s – 235 engine aftermarket manual choke 1953~1956
2101s – 235 engine aftermarket auto choke 1953~1956
2104s – 261 engine aftermarket (number assigned, no production)
3055s – aftermarket (number assigned, no production)
3211s – 235 engine aftermarket 1957~1962
3379s – 153 engine original equipment manual trans 1962~1966
3402s – 153 engine original equipment auto trans 1962~1966
3711s – 194 engine aftermarket 1962
3760s – 230 engine (number assigned, no production)
3770s – 230 engine (taxi) original equipment auto transmission 1964~1965
3771s – 230 engine (taxi) original equipment manual trans 1964~1965
3772s – 194 engine auto transmission (number assigned, no production) 1964
3773s – 194 engine manual trans (number assigned, no production) 1964
3821s – 194 engine (van) original equipment 1964
3946s – 194 engine aftermarket 1964~1965
3946s – 230 engine aftermarket 1964~1965
3975s – 230 engine (van) original equipment manual trans 1965
3976s – 230 engine (van) original equipment auto trans 1965
4043s – 194 engine (van) original equipment manual trans 1966
4043s – 230 engine (van) original equipment manual trans 1966
4044s – 194 engine (van) original equipment auto trans 1966
4044s – 230 engine (van) original equipment auto trans 1966
4048s – 230 engine (van) aftermarket experimental 1963~1966
4072s – 194 engine original equipment auto trans CALIF smog 1966
4072s – 230 engine original equipment auto trans CALIF smog 1966
4073s – 194 engine original equipment manual trans CALIF smog 1966
4073s – 230 engine original equipment manual trans CALIF smog 1966
4080s – 194 engine original equipment (pass) auto trans CALIF smog 1966
4080s – 230 engine original equipment (pass) auto trans CALIF smog 1966
4080s – 250 engine original equipment (pass) auto trans CALIF smog 1966
4085s – 230 engine original equipment (truck) manual trans CALIF smog 1966
4085s – 250 engine original equipment (truck) manual trans CALIF smog 1966
4086s – 230 engine original equipment (truck) auto trans CALIF smog 1966
4086s – 250 engine original equipment (truck) auto trans CALIF smog 1966
4145s – 194 engine original equipment (truck) manual trans 1965~1966
4145s – 230 engine original equipment (truck) manual trans 1965~1966
4202s – 250 engine (taxi) original equipment auto trans 1966
4203s – 250 engine (taxi) original equipment manual trans 1966
4278s – (export to India)
4339s – 194 engine aftermarket 1963~1967
4339s – 230 engine aftermarket 1963~1967
4339s – 250 engine aftermarket 1963~1967
4367s – 230 engine original equipment manual trans CALIF smog 1967
4367s – 250 engine original equipment manual trans CALIF smog 1967
4368s – 194 engine original equipment auto trans CALIF smog 1967
4368s – 230 engine original equipment auto trans CALIF smog 1967
4368s – 250 engine original equipment auto trans CALIF smog 1967
4369s – 230 engine original equipment (truck) manual trans CALIF smog 1967
4369s – 250 engine original equipment (truck) manual trans CALIF smog 1967
4370s – 230 engine original equipment (truck) auto trans CALIF smog 1967
4370s – 250 engine original equipment (truck) auto trans CALIF smog 1967
4371s – 230 engine original equipment (truck) manual trans CALIF smog 1967
4371s – 250 engine original equipment (truck) manual trans CALIF smog 1967
4371s – 292 engine original equipment (truck) manual trans CALIF smog 1967
4372s – 250 engine original equipment (truck) auto trans CALIF smog 1967
4373s – 153 engine aftermarket manual trans 1963~1967
4374s – 153 engine aftermarket auto trans 1963~1967
4375s – 230 engine original equipment (truck) manual trans 1967
4375s – 250 engine original equipment (truck) manual trans 1967
4376s – 230 engine original equipment (truck) auto trans 1967
4376s – 250 engine original equipment (truck) auto trans 1967
4377s – 250 engine original equipment (taxi) manual trans CALIF smog 1967
4378s – 250 engine original equipment (taxi) auto trans CALIF smog 1967
4387s – 194 engine original equipment (truck) manual trans CALIF smog 1967
4480s – 230 engine aftermarket (all Federal) 1963~1967
4480s – 250 engine aftermarket (all Federal) 1963~1967
4492s – 194 engine aftermarket 1962
6213s – number assigned no production | | | | | Joined: Mar 2014 Posts: 161 Shop Shark | | Shop Shark Joined: Mar 2014 Posts: 161 | That's exactly what I was looking for. thank you---Jack | | | | | Joined: Mar 2010 Posts: 10,059 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,059 | The gas formulated with ethanol also has highly volatile additives to make up for the lower energy derived from the ethanol. This formulation appears to have an unintended effect of being an efficient solvent of crud which normally accumulates and stays put on the inside of the tank and inside of the fuel lines. Even if your system is fairly clean, if all of that 'little bit' of crud is washed out of the tank and lines, it will settle out and collect in the carburetor.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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