Author Topic: 1961 220Sb stalls when choke is pushed in.  (Read 377 times)

badali

  • Full Member
  • Platinum
  • ******
  • USA, Pa, Butler
  • Posts: 1027
  • 1966 230SL
1961 220Sb stalls when choke is pushed in.
« on: May 03, 2024, 19:34:16 »
I just started my 220Sb for the first run this year.  I put in plugs and points after going around the block and rough running. The car will run well if I keep my foot on the gas.  I just temporarily adjusted the choke out just a little so it will stay running when at idle.  I'm kind of stumped for now since I think I had the choke in the whole way before and it would idle ok.  The car is a 4 speed on the column.
Brad

1961 220 Sb
1966 230 SL
2019 E 450 4 Matic
2022 GLC 300 4 Matic

Benz Dr.

  • Vendor
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 7157
  • Benz Dr.
Re: 1961 220Sb stalls when choke is pushed in.
« Reply #1 on: May 03, 2024, 20:20:32 »
Vacuum leak, low fuel level, not enough ignition timing, wrong dwell angle, idle screw turned in too far.  Lots to look for.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

badali

  • Full Member
  • Platinum
  • ******
  • USA, Pa, Butler
  • Posts: 1027
  • 1966 230SL
Re: 1961 220Sb stalls when choke is pushed in.
« Reply #2 on: May 03, 2024, 20:41:18 »
The points are at 16 thousandth.  I really didn't change anything else.  I didn't check for a vacuum leak.  I'll check everything when I can get back to it.  There was a little corrosion inside the distributor and the old points were burnt.
Brad

1961 220 Sb
1966 230 SL
2019 E 450 4 Matic
2022 GLC 300 4 Matic

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7317
Re: 1961 220Sb stalls when choke is pushed in.
« Reply #3 on: May 04, 2024, 06:13:10 »
You probably stored it with Ethanol fuel in it. Try to find some non-ehtanol fuel before storing a car especially one with carburetors. We have "Sheets" fuel stations in Ohio which have some non-ethanol pumps. The ethanol fuel absorbs water out of the air and the moisture is especially hard on fuel systems, especially carbureted. Sounds like you have a brass idle jet plugged. You can remove most of the jets on the carburetors without removing or taking the carburetor apart. Just locate the jets one at a time and clean the tiny opening. I can almost guarantee you it is an idle jet plugged. If you have a BBB it should point out where the idle jet is for you. Give me a call if you need to Brad.

Joe
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

badali

  • Full Member
  • Platinum
  • ******
  • USA, Pa, Butler
  • Posts: 1027
  • 1966 230SL
Re: 1961 220Sb stalls when choke is pushed in.
« Reply #4 on: May 05, 2024, 15:48:52 »
Thanks Joe and Dan.  I haven't had a chance to get back to it yet.  I work weekends...  I'll let you know what works when I get to look at it again.
Brad

1961 220 Sb
1966 230 SL
2019 E 450 4 Matic
2022 GLC 300 4 Matic

badali

  • Full Member
  • Platinum
  • ******
  • USA, Pa, Butler
  • Posts: 1027
  • 1966 230SL
Re: 1961 220Sb stalls when choke is pushed in.
« Reply #5 on: May 06, 2024, 21:51:15 »
Joe, Are the pin holes at the end of these what would be plugged? The rest of it didn't look too bad.  I cleaned them and put them back in.  I didn't try to start it yet as I ran out of time again...
Brad

1961 220 Sb
1966 230 SL
2019 E 450 4 Matic
2022 GLC 300 4 Matic

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7317
Re: 1961 220Sb stalls when choke is pushed in.
« Reply #6 on: May 07, 2024, 12:29:36 »
Yes, those are the idle jets. There is a tiny hole at the end. Clear it and you should be ready to go. A small tag wire will work if it will not blow clean.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback