Carb options, w115, any thoughts? - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 09-27-2008, 12:35 PM Thread Starter
BenzWorld Newbie
 
Date registered: Sep 2008
Vehicle: 1972 Mercedes 200
Location: Missouri, USA
Posts: 2
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Carb options, w115, any thoughts?

Hey everyone, I'm a complete newbie to the vintage Mercedes world. I just picked up a very clean '72 200. Once warm it runs like a top, but for the first 10 minutes or so it runs terribly, wanting to die every time I let of the throttle, idling rough, etc. Is this just a matter of it needing a serious tune up and carb cleaning? I'm still learning how to work with Carbs but I was told that it sounds like it might be running rich. I've also been told that the Stromberg Carbs are generally a pain, and that swapping to a Weber is a popular mod. Anyway, any thoughts? Thanks
42ndRHRfifer is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 09-27-2008, 01:54 PM
BenzWorld Extremist
 
Eirik 400 SE's Avatar
 
Date registered: Jan 2008
Vehicle: 1973 W115 200 /8
Location: Norway
Posts: 895
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
A thing to check is the membrane inside the top of the carb.. It should be tight, and without cracks..
The mixture is adjusted with the screw UNDER the main house.. IN/UP=leaner mixture and OUT/DOWN= Richer mixture.
The idle is adjusted with the screw right at the side.. NOT the lever from under the carb..
Is there enough oil in the carb ?
Is the automatic choke adjusted correctly ?
Is the ignition OK ? Dwell/Cam angle and timing ?
There's a LOT that could be off.. which would give symptoms of bad fuelconsumption, smoke, rough idle etc etc..

1991 W140 400 SE - SOLD !!
1973 W115 200 -For sale as project.
Eirik 400 SE is offline  
post #3 of 8 (permalink) Old 09-28-2008, 11:03 AM
BenzWorld Elite
 
Grubeguy's Avatar
 
Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
Location: DC Area
Posts: 2,109
Mentioned: 1 Post(s)
Quoted: 95 Post(s)
Send a message via MSN to Grubeguy Send a message via Yahoo to Grubeguy
The Weber mod is an easy one to do - I did it with a 280C, replacing the original Solex carb. It didn't present any huge issues, but the original carb was a much better one, and I ended up regretting the replacement. I went from about 18 mpg on the highway to 12, even with the Weber leaned way out. I would suggest you take yours apart, clean it, do all the tuneup stuff, and see what you have once it all gets put back together.

Last edited by Grubeguy; 09-29-2008 at 01:07 PM.
Grubeguy is offline  
post #4 of 8 (permalink) Old 09-28-2008, 12:01 PM
BenzWorld Extremist
 
Eirik 400 SE's Avatar
 
Date registered: Jan 2008
Vehicle: 1973 W115 200 /8
Location: Norway
Posts: 895
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Only thing.. The Stromberg is a SIDE-carb.. And Solex and Weber are usually DOWN...
The 280 C had most likely 2 carbs. They're an easy fix..
The Stromberg replacement could mean a new intake-manifold..

1991 W140 400 SE - SOLD !!
1973 W115 200 -For sale as project.
Eirik 400 SE is offline  
post #5 of 8 (permalink) Old 09-28-2008, 08:10 PM
BenzWorld Veteran
 
E-Class Owner's Avatar
 
Date registered: May 2007
Vehicle: 2003 Mercedes Benz E500
Location: San Francisco Bay Area
Posts: 654
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
The 280C,

M110, in non-FI form, had a four barrel down-draft carb. IIRC both Weber and Solex [especially Mikuni licensed ones] are available as side draft units; that said, I would work on getting the OE carb fixed/re-built as opposed to adding an after-market unit to the mix.

Good luck,

JR
E-Class Owner is offline  
post #6 of 8 (permalink) Old 09-29-2008, 10:19 AM
BenzWorld Junior Member
 
patrick800's Avatar
 
Date registered: Aug 2006
Vehicle: 1973 MB 280C (sold), 1976 MB 300D, 2009 VW CC 4motion
Location: Bathurst, Canada
Posts: 36
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I had a 73 280C with the 4 barrel solex carb, a real PITA. I replaced it with a weber, had a horrible flat spot. IMHO the weber is not a bad carb but is simply not adapted to these cars, better to stick with original carb.

I now have a fuel injected diesel 115 and I dont miss these old carbs one bit!

Last edited by patrick800; 09-29-2008 at 10:22 AM.
patrick800 is offline  
post #7 of 8 (permalink) Old 09-30-2008, 06:26 PM Thread Starter
BenzWorld Newbie
 
Date registered: Sep 2008
Vehicle: 1972 Mercedes 200
Location: Missouri, USA
Posts: 2
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Yup, I've got a Stromberg sidedraft carb. I knew that any weber swap would have to be a DCOE or something along those lines and would require the manifold and everything. But from the sounds of it, it looks like I'm ordering a rebuild kit this week. One more question. Ive found a couple sites that carry basic rebuild kits, and a couple also carry a complete overhaul kit with new jets and everything. Is there any particular reason for this? Are these carbs known to wear out their internals, or should I probably be good with a normal rebuild. Thanks
42ndRHRfifer is offline  
post #8 of 8 (permalink) Old 10-01-2008, 02:26 AM
BenzWorld Extremist
 
Eirik 400 SE's Avatar
 
Date registered: Jan 2008
Vehicle: 1973 W115 200 /8
Location: Norway
Posts: 895
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I just ordered a complete set from Mercedes.
A0015861107 was the part number I needed for my Stromberg carb..

1991 W140 400 SE - SOLD !!
1973 W115 200 -For sale as project.
Eirik 400 SE is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Similar Threads
    Topic Author Forum Replies Last Post
    Interesting information on my car, any thoughts on these options? slybydesign W210 E-Class 5 08-08-2007 03:30 PM
    V8 FI to Carb dubnluvn Vintage Mercedes-Benz 4 08-21-2006 09:53 PM
    Wheel options - possibly more options mb230s G-Class 3 12-10-2004 10:31 AM
    Lowenhart LDR Replicas.... want some thoughts on options (READ ALL!) jtoma878 C208/A208 CLK-Class 8 08-30-2004 04:34 PM
    To Tim, Norb, Brian and Calvin (Options Options Options) Matthew R170 SLK-Class 9 12-19-2000 08:13 PM

    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome