any manual for refurbished zenith 35/40?

1961-1968: a.k.a "Finnie" or "Heckflosse" models
190, 190D, 200, 200D, 220b, 220Sb, 220SEb, 230, 230S, 250SE coupe, 280SE coupe, 280SE 3.5 coupe, 220SEb cabrio., 250SE conv., 280SE cabrio., 280SE 3.5 Cabrio., 300SE, 300SE coupe, 300SE conv., 300SEL
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heiwaz
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any manual for refurbished zenith 35/40?

Post by heiwaz » Sat 01 Sep, 2018 12:35 am

Hello, I will start to refurbished my w111 zenith carbs. I bought a refurbished kit, and now I need to dissasembly, clean and replace all parts in the kit. Do you know if there is any manual for this carbs?

I searched and only found the jaimekop web http://www.jaimekop.com/CarbManual/Page01/toc.html but has got bad quality photos and explain to solve problems with the carbs, no to dissasembly and mounty again.

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dynamike
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Re: any manual for refurbished zenith 35/40?

Post by dynamike » Sat 01 Sep, 2018 6:34 am

I did a lot of research on them a while ago and collated everything I could find in this topic. Helps if you can read German

viewtopic.php?f=9&t=24663
1965 220 Sb Sedan
1962 220Seb Sedan (stripped for parts)
http://ozbenz.net/viewtopic.php?f=9&t=23626

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John Green
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Re: any manual for refurbished zenith 35/40?

Post by John Green » Sat 01 Sep, 2018 8:14 am

heiwaz wrote:
Sat 01 Sep, 2018 12:35 am
I searched and only found the jaimekop web http://www.jaimekop.com/CarbManual/Page01/toc.html but has got bad quality photos and explain to solve problems with the carbs, no to dissasembly and mounty again.
Jamie, wrote and published this nearly 20 years ago, so no surprise the pictures are poor. The information it contains however is very accurate.
Inaugural OZBENZ national meet this September, all welcome to attend. https://ozbenz.net/viewtopic.php?f=46&t=25165

M.B Spares & Service 14-16 Lyell St, Fyshwick ACT. Ph 02 6239 1099

http://mbspares.com.au - Supporting Australia's Mercedes-Benz Enthusiasts.

heiwaz
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Re: any manual for refurbished zenith 35/40?

Post by heiwaz » Sun 02 Sep, 2018 6:52 am

I found on youtube a very explained and detailed video (in spanish) of the assembly of this carb. Is from a bmw but the model is the same with minor differences.



Carburetor Zenith INAT 35/40 assembly

Part1: https://www.youtube.com/watch?v=7-bMXv_N-Vg

Part 2: https://www.youtube.com/watch?v=iJ6cZra27CU&t=2s

Part 3: https://www.youtube.com/watch?v=EmGxdiCYYYI

Part 4: https://www.youtube.com/watch?v=ulgS7bcSurc

Part 5: https://www.youtube.com/watch?v=XVZjqi0TRB4&t=26s

Part 6: https://www.youtube.com/watch?v=qwpFcjzsTy4&t=227s

Part 7: https://www.youtube.com/watch?v=ExHIJHS39mg

Part 8: https://www.youtube.com/watch?v=qegAXKsEjss

Part 9: https://www.youtube.com/watch?v=jZP4WnP7-F8

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Re: any manual for refurbished zenith 35/40?

Post by CraigB » Sun 02 Sep, 2018 8:42 am

Great videos! Will have to brush up on my spanish.... Very detailed pics though
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heiwaz
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Re: any manual for refurbished zenith 35/40?

Post by heiwaz » Fri 21 Sep, 2018 1:05 am

Another complete manual for Zenith 35/40 INAT carbs...

https://www.e9coupe.com/tech/zeniths/bmw1/bmw1.html

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Re: any manual for refurbished zenith 35/40?

Post by CraigB » Fri 21 Sep, 2018 11:36 am

that's great thankyou - I need to remember where to find it when i need it.
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Re: any manual for refurbished zenith 35/40?

Post by Mercmad » Sun 25 Nov, 2018 3:16 pm

Beware of these kits .In some, the gaskets are the only useful parts. I just rebuilt a pair and the cost was $1400. The carb bodies were worn in the accelerator pump bores and the pump parts supplied in the kits were too small and really pisspoor quality. I had to replace the vacuum idle canister and the only place i could find a good one was India!. I got parts for the carbs from a really helpful bloke in the UK, Eric at the Carburetor hospital
http://www.carburettorspecialists.com/ . I had to replace the autotrans switch ,which have a list price of $1200, luckily i still had a NOS here which saved the owner a few wad of cash. They are pretty simple once you sit down and see how each part works, and being on an earlier model car,they are a reasonable quality. The tricky part is ensuring the chokes are set as accurately as humanely possible and the vent valve and accelerator pumps are delivering the correct amount of fuel ,plus spraying in the correct direction. Manual trans carbs and auto trans carbs differ in this respect.

With our modern Fuels,we are going to be in a situation soon where the jet sizes are going to have to increased . Alchohol in fuel not only rots the fuel lines and eats the pot metal but it also needs larger jet sizes to deliver the same amount of power as the old fuel used too.

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Re: any manual for refurbished zenith 35/40?

Post by CraigB » Sun 25 Nov, 2018 7:15 pm

Thanks for the contact Ron. I will have to look at my manual and auto carbs - amazing detail!
Craig Baulderstone
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280SE3.5
280SL
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dynamike
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Re: any manual for refurbished zenith 35/40?

Post by dynamike » Mon 26 Nov, 2018 8:02 am

Hey Ron,

I've been literally doing the same thing over the weekend. Perhaps you might be able to shed some light on some of my remaining questions:

1. Choke flap worn. The second stage flap doesn't seem to seal off properly with gaps on each sides. Are they worn and need replacing or is such a gap normal?
2. Both pistons on the accelerator pumps are pretty scratched up. What's the impact and should they better be replaced too?
3. For the automatic choke, I tested the electrically heated bi-metal spring by attaching a 12 volt charger. Both heat up alright but I failed to observe any kind of movement. Should this movement be clearly visible or is the heat sufficient confirmation?
4. The manuals for the Zeniths specify a float of 18-20mm. Both of mine were below 17mm. I've used spacers now but how can they be out by so much?

https://imgur.com/a/lQpIhI5

I found this German manual the most comprehensive and useful one: https://www.strichacht-forum.de/knowhow ... EIBUNG.pdf

Also, I took photos of almost everything if anyone is keen to see more.
You do not have the required permissions to view the files attached to this post.
1965 220 Sb Sedan
1962 220Seb Sedan (stripped for parts)
http://ozbenz.net/viewtopic.php?f=9&t=23626

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Bartman4800
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Re: any manual for refurbished zenith 35/40?

Post by Bartman4800 » Mon 26 Nov, 2018 1:19 pm

-Your choke flap is fine. Chokes always need to leave a bit of flow, all they do is enrich the mixture.
At full throttle they actually open up against the bimetal spring, otherwise your engine is throttled.

-Your acceleration pump is a different story. If the pistons are scored, what are the bores like?
Both need to be scratch free, otherwise you will never get a good squirt of fuel..
Looks like you need new pistons. If your bores are scored it might be game over - go to the Weber option.

-The electric choke needs to move the choke flap. Just heating up is not sufficient. You should see movement within minutes.
Are the choke valves moving freely?

-a washer with 0.1 mm difference in thickness probably makes a 1 mm difference in fuel level
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

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