Zenith Jets - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 07-10-2013, 06:41 PM Thread Starter
BenzWorld Elite
rumb's Avatar
Date registered: Oct 2012
Vehicle: 1968 250S, 1991 300se, 1998 SL500, 2x 1977 450SEL 6.9. Past MB's; 300SD, 300E, 300TE, 190E, ML420
Location: Colorado
Posts: 2,253
Mentioned: 5 Post(s)
Quoted: 405 Post(s)
(Thread Starter)
Zenith Jets

I'm starting this thread as the other was getting OT.

The best info I have found on Zenith carbs is Zenith Carb Manual TOC

The last page contains a jet chart for the various models. There are not a lot of different jet sizes, but they show what is correct for various models.

Word of caution if you buy a Zenith on fleabay or junkyard. The jets may/probably will not be what is for you car. These carbs were also used on BMW's.

I have also Glenn's Mercedes Benz repair and tune up guide book. It has different values in it than the jaimekop. Also Haynes has different and over simplified.

The carbs on my car were replacements many years ago, I did not even think at the time about jet differences. When I rebuild recently I bought another set. I picked out the jets that were the closest I could find to the JK chart.

I would also think that there really isnt much room to play around with the jet sizes on these. These carbs are great when set up correctly and will stay that way forever.
rumb is offline  
Sponsored Links
post #2 of 6 (permalink) Old 07-10-2013, 07:13 PM
BenzWorld Extremist
kavadarci's Avatar
Date registered: Aug 2008
Vehicle: 1971 250C
Location: Toronto, Canada
Posts: 1,056
Mentioned: 0 Post(s)
Quoted: 14 Post(s)
Now I know who to ask if I have problems with my zenith carbs :-)

Sent from AutoGuide.com Free App
kavadarci is offline  
post #3 of 6 (permalink) Old 07-10-2013, 07:17 PM
BenzWorld Veteran
Date registered: Aug 2009
Vehicle: '72 250C, '74 280C, '85 500SEL, '81 300CD.
Location: Tucson, Az.
Posts: 650
Mentioned: 2 Post(s)
Quoted: 49 Post(s)
"When", not if.
Mike D is offline  
post #4 of 6 (permalink) Old 07-10-2013, 09:08 PM
BenzWorld Member
Date registered: Dec 2006
Posts: 74
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
The BMW Carburetors

Further Zenith reading from the BMW side if the tracks...
jmela is offline  
post #5 of 6 (permalink) Old 07-11-2013, 07:38 AM
Premium Member
Date registered: Nov 2012
Posts: 1,241
Mentioned: 0 Post(s)
Quoted: 59 Post(s)
Premium Member
for MB all jet sizes are listed , just need to know , year and model .
agillot is offline  
post #6 of 6 (permalink) Old 07-12-2013, 01:20 PM
BenzWorld Member
Date registered: May 2013
Vehicle: 1961 190SL
Location: Northern California, USA
Posts: 136
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
"The best info I have found on Zenith carbs is Zenith Carb Manual TOC"


Chances are I will never even see, let alone use a Zenith carburetor on a car although I think my 1952 Ford 8N tractor has one. Still, I found the data in your manual interesting. Are the metering parts removable to allow modifications of those carburetors? If so, the Zenith guys should be able to do some good old fashioned, red blooded speed tuning.

Ray W
Waldbaum is offline  
Sponsored Links

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

Quick Reply

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


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

Email Address:


  • 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

    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

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