1956 220S- Solex Experts please chime in - Mercedes-Benz Forum

 
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post #1 of 9 (permalink) Old 05-24-2014, 06:40 AM Thread Starter
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Vehicle: 2014 E350, 1995 S500 Coupe, 1989 560SEC, 1985 280SL 5spd, 1969 280sl 4 spd, 1956 220S, 1966 230
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1956 220S- Solex Experts please chime in

Greetings-

I recently acquired a really nice 56 220S Sedan. The previous owner did a lot of advanced amateur restoration- making for a nice driver...if it ran right.

The car can be started with the choke fully on but will stall when the choke is off- regardless the operating temperature. The twin 32PAITA carbs were supposedly rebuilt but look more like "cleaned up" to me.

I'm getting ready to break them down and do a proper rebuild but if anyone has any immediate ideas about how to get the car to warm idle without choke I'd appreciate any replies.

Jay
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post #2 of 9 (permalink) Old 05-24-2014, 09:34 AM
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aspiring solex expert here!

Beautiful car you have there. The PAITA is a good, easy to understand/use carburetor. If the car is running with the choke pulled (and i'm assuming it will also run if you depress the gas pedal), then what's likely happened is the idle circuit in one or both carburetors is clogged, malfunctioning, or severely unbalanced. The idle jet is a basically a little screw with a precisely made hole at the end of it, and this is what regulates fuel pressure at idle...any blockage here will result in what you are describing.

If this is the problem and you resolve it, the next issue will be to make sure the carburetors are pulling a balanced amount of air. You will need a synchrometer in order to do this.

Another slight possibility is also that the needle valve in one of your carbs is stuck in closed position, which would mean no fuel at all to one of the carbs. Easy to check if this valve is working with a slight disassembly of the top cover of each carburetor.
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post #3 of 9 (permalink) Old 05-24-2014, 11:55 AM Thread Starter
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Date registered: Apr 2010
Vehicle: 2014 E350, 1995 S500 Coupe, 1989 560SEC, 1985 280SL 5spd, 1969 280sl 4 spd, 1956 220S, 1966 230
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Thanks for the advice- Rebuilt several sets of Webers in the past- so the Solex layout is a little bit backwards for me. I'm assuming that the idle jets are clogged- car will respond to throttle OK.
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post #4 of 9 (permalink) Old 05-24-2014, 11:55 AM
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Several good write ups on the carbs here - Mercedes-Benz Pontons (1953-1962) © www.mbzponton.org. Rebuilding and cleaning the idle circuit articles are there. Search box at the bottom of that page.

Oh, and join our ponton group. It is linked on that page too. We've got about 900 owners with a great wealth of knowledge and parts.

You've also got a ponton expert shop in your area - Henry Magno of Magno Restorations - http://www.magnorestorations.com/. Tell Henry I sent you.

Len
'59 220S Cabriolet - for sale - http://www.mbzponton.org/mbz220s/sellswap/car4sale.htm
'83 240D original owner 351,500 miles - for sale - http://www.benzworld.org/forums/w123...g-my-240d.html
'88 560SL 41,000 miles being parted out - https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 196,000 miles
'03 SLK320 34,500 miles
'14 Smart electric

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post #5 of 9 (permalink) Old 05-24-2014, 01:05 PM Thread Starter
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Date registered: Apr 2010
Vehicle: 2014 E350, 1995 S500 Coupe, 1989 560SEC, 1985 280SL 5spd, 1969 280sl 4 spd, 1956 220S, 1966 230
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Excellent tip- Don't know Henry- Ed Owen at EAS has been doing all of my Mercedes work... But I'd rather fix what I can, where I can.
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post #6 of 9 (permalink) Old 05-24-2014, 11:31 PM
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Looks like a nice ride!! Good luck on getting it running properly.

'85 Euro 190E 2.3-16
'84 Euro 500SE ~100k miles
'51 Euro 170S *Being reborn*
'97 Jeep Wrangler Sport ~42k miles
'08 BMW Z4 3.0 si ~14.3k miles
'09 E350 ~51k miles
'98 Dodge Durango SLT+ 5.9L Magnum V8

~Josh
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post #7 of 9 (permalink) Old 05-25-2014, 05:30 AM
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Beautiful car. Also, very nice to see someone that has a worse Mercedes addiction than I do.
I hope you get the carburetors sorted because that car looks like it will be a joy to drive. Have fun.
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post #8 of 9 (permalink) Old 05-25-2014, 06:04 AM Thread Starter
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Quote:
Originally Posted by dgosh28 View Post
Beautiful car. Also, very nice to see someone that has a worse Mercedes addiction than I do.
I hope you get the carburetors sorted because that car looks like it will be a joy to drive. Have fun.
The Mercedes gang is just part of my addiction... My 69 280SL is in the middle of a full rotisserie restoration, so all the funds go towards that. Everything else gets fixed in house if I can.

Had very good luck with the two barrel Solex carbs on my 59 Bug Cabriolet- so I'm quite sure once I delve into these I'll get it sorted.

Also does anyone have parts #s for the shifter bushings? The ones in the column? Not sure if they are the same as the W110 bushings.
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post #9 of 9 (permalink) Old 05-25-2014, 04:57 PM
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the idle jets are above the idle adj screws , it has a hex head with a slot for screw driver .the hole at the end is TINY and always plug , so no idle . remove and clean .use carb cleaner in a spray can .
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