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how do you rebuild a carb

 
 
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emm
Articulating


Joined: 27 Sep 2005
Odometer: 642
Location: Cheltenham



PostPosted: Mon Apr 09, 2007 7:32 pm    Post subject: how do you rebuild a carb Reply with quote

i am going to rebuild my standard carb. i have a 92 1.3 spanish sammy. I would replace with an SU or a nikki, but i have abouut 20-30 quid left to spend and i don't think i would find for that.
Has anyone rebuild a standard carb, how easy was it to do and how can i improve it.
Piccys would be great or a write up even better. ANy help wopuld be most greatful.

andy
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Nigel Head
Mud Obsessed


Joined: 05 Jul 2004
Odometer: 3886
Location: Mid Devon


1990 Suzuki Samurai

PostPosted: Mon Apr 09, 2007 7:49 pm    Post subject: Reply with quote

http://www.suzukitech.org/index.php

Have a look in the 'Carburettor' section - some info on std Aisin carb in there...

Basically, assembly is the reversal of removal!!!

As you remove parts, label them, lay them on a clean work area and take your time.
If you have a digi camera, take plenty of pics to remind yourself how things were before you removed them.
Not too difficult really Wink

Nigel.

__________________________________
Heck - it's only a hobby!
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emm
Articulating


Joined: 27 Sep 2005
Odometer: 642
Location: Cheltenham



PostPosted: Mon Apr 09, 2007 8:08 pm    Post subject: Reply with quote

nope doesn't help, as it doesn;t tell you how to strip it down - i am guessing the hanyes manual will have it, but is it worth trusting that???
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Nigel Head
Mud Obsessed


Joined: 05 Jul 2004
Odometer: 3886
Location: Mid Devon


1990 Suzuki Samurai

PostPosted: Mon Apr 09, 2007 8:22 pm    Post subject: Reply with quote

Sorry, can't help then.
I don't have a manual and simply remove something, noting the process and when there's nothing else to remove I reverse the process and rebuild !!!

Someone else may have a link or better suggestion...

Nigel.

__________________________________
Heck - it's only a hobby!
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tango-zuke-5
Articulating


Joined: 02 Jan 2007
Odometer: 567
Location: felixstowe


1981 Suzuki LJ

PostPosted: Mon Apr 09, 2007 8:28 pm    Post subject: Reply with quote

you might get cheap su or nikki off ebay?
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zimguy
Just got MTs


Joined: 22 Jul 2006
Odometer: 252
Location: Cheltenham-on-sea



PostPosted: Mon Apr 09, 2007 9:23 pm    Post subject: Reply with quote

Emm

Call me, I have done this on mine and now know it backwards.

Would swap mine for an SU in a heartbeat but just haven't had the time to look into it.

My standard one was fine after rebuild.

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** When you least expect it.......................expect it **

**WE AL MAKE MISTAKES SAID THE DARLEK GETING OFF THE DUSTBIN**
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oshimon
Mooch Master


Joined: 24 Oct 2003
Odometer: 6786
Location: Jerusalem. Israel



PostPosted: Tue Apr 10, 2007 4:07 pm    Post subject: Reply with quote

Emm, I striped mine down today and took some pics -

Mines a manual choke one and there are at least four different Aisin carb types so yours may look a bit different but the principals are the same.
I don't want to go into all the vacuum pipes and what not (I disconnected them all a long time ago!), this is just a hint as to how to strip it down....

This is also not a full strip down, just enough to get to the important bits and to give them a clean. Every bit you see or remove give it a good squirt with CarbMedic and clean it.

First disconnect choke, accelerator, fuel line and fuel solenoid wire -


Undo the four bolts holding carb to manifold (could be from the top depending on model)-


Take a note of how the gaskets and channeled spacer plate sit, leave them on the manifold-


Remove carb (practice throwing at neighbor's dog)-


Undo bolt holding acceleration pump arm and slide arm out of the pumps plunger (left hand side in photo) -


Remove fuel solenoid -


Undo 2 screws holding the hot idle gubbins, disconnect the vacuum pipes and remove -


Bottom HIC vacuum pipe sits on the very bottom of the carb-


Remove fuel inlet banjo -


To remove the (manual) choke stuff do this -


Simon 'grrrrrrrrrr 10 pics max upload per post' Owen.

__________________________________
There are some days when even my lucky underpants can't help.....

For Ian's sake, desperately trying to keep up at the back.
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oshimon
Mooch Master


Joined: 24 Oct 2003
Odometer: 6786
Location: Jerusalem. Israel



PostPosted: Tue Apr 10, 2007 4:08 pm    Post subject: Reply with quote

Note this -


And off it comes -


Remove this pin from accelerator gubbins to choke gubbins to release the arm -


And undo the 5 screws -


Top part (air horn) now comes off -


Remove spring from accelerator pump -


A quick map -


Remove primary and secondary speed jets and check gaskets -




Undo the two bolts to gain access to the main jets -

__________________________________
There are some days when even my lucky underpants can't help.....

For Ian's sake, desperately trying to keep up at the back.
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oshimon
Mooch Master


Joined: 24 Oct 2003
Odometer: 6786
Location: Jerusalem. Israel



PostPosted: Tue Apr 10, 2007 4:13 pm    Post subject: Reply with quote

Remove main jets (primary and secondary)-


Give everything a good clean. Check for damaged gaskets and rubbers on the acceleration pump.

Re build and go VROOM VROOM!!!

I had a lump of something keeping the secondary speed butterfly partially open which was causing me big problems (similar to yours) but now it runs sweet!

Hope this helps!

Simon 'likes to get his electronic crayons out' Owen.

__________________________________
There are some days when even my lucky underpants can't help.....

For Ian's sake, desperately trying to keep up at the back.
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emm
Articulating


Joined: 27 Sep 2005
Odometer: 642
Location: Cheltenham



PostPosted: Tue Apr 10, 2007 4:46 pm    Post subject: Reply with quote

thanks guys, doesn't look too taxing, 20 minute going on 4hour job. Sorry nigel if i seemed a bit short - i was just alittle fed and when i realised i might not be going to drumclog - well you can understand.
Zimguy i have sent you a text.

thanks guys i will let you know how it all pans out.
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emm
Articulating


Joined: 27 Sep 2005
Odometer: 642
Location: Cheltenham



PostPosted: Tue Apr 10, 2007 4:50 pm    Post subject: Reply with quote

and osihman thanks for a quality walkthrough as well
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Nigel Head
Mud Obsessed


Joined: 05 Jul 2004
Odometer: 3886
Location: Mid Devon


1990 Suzuki Samurai

PostPosted: Tue Apr 10, 2007 5:36 pm    Post subject: Reply with quote

emm, no probs.
My LWB project is 4 months into the build, was supposed to be 4 weeks...
Haven't gotten muddy this year (other than in the garden) Crying or Very sad

Simon,
Top write up as usual.

See, there's always someone on Difflock who comes to the rescue.

Nigel.

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Sooty Zooki
Mud Obsessed


Joined: 16 Nov 2003
Odometer: 4828
Location: Beverley, East Yorks



PostPosted: Tue Apr 10, 2007 5:59 pm    Post subject: Reply with quote

Well Simon I'm impressed:- I would have said bin it. I have seen more talented people than myself mechanically attempt a strip Aisin carb and fail to get it running any better.
__________________________________
Reformed Suzuki Samurai owner (but still has a 02 Jimny!). 1993 Fourtrak 2.8 TD Intercooler.
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oshimon
Mooch Master


Joined: 24 Oct 2003
Odometer: 6786
Location: Jerusalem. Israel



PostPosted: Wed Apr 11, 2007 6:16 am    Post subject: Reply with quote

Cheers all and I hope this helps you sought out your problem Andy.

The manual choke Aisin is an excellent carb - heck, the auto choke is an excellent carb as well, and when they run they run extremely well it's just that they are over complicated so when something goes wrong it's a ****** to track it down.

Over here we swap to a manual choke (much better for crawling any way) and do away with all the vacuum stuff (it's all mainly for cold starts etc.) because it's not needed.
Leaves you with a relatively simple, reliable and cheap carb.

As a side note, I have a feeling that the Subaru DL series of carbs will fit zooks. These carbs are bomb proof and a doodle to set up, maintain and fix.
When I get the time I'll have a play with a few and see if they need an adapter plate or not.

Simon 'cheap as chips' Owen.

__________________________________
There are some days when even my lucky underpants can't help.....

For Ian's sake, desperately trying to keep up at the back.
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overdrive
Gate Opener


Joined: 15 Oct 2012
Odometer: 36




PostPosted: Sat Feb 09, 2013 6:05 pm    Post subject: Reply with quote

Simon, thanks for the write up! Identifies a lot for those unfamiliar with the Aisin!

Can anyone advise on adjusting the fuel / air mixture with the carb mounted? On mine there is what I gather to be a spring cover, but under there I can see no screwdriver slot to turn or adjust it with, only a flat face. Is there a trick to this?
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TJ_in_Dubai
Just got MTs


Joined: 24 Oct 2011
Odometer: 371
Location: Dubai, UAE


1997 Jeep Wrangler

PostPosted: Sat Feb 09, 2013 8:21 pm    Post subject: Reply with quote

If you do go the SU route and if I remember correctly there is a book by Davis Vizard (http://www.amazon.co.uk/Tuning-British-Leylands-Series-Engine/dp/0854297324/ref=ntt_at_ep_dpt_6) which details tuning them up. Nice cheap tricks too.
__________________________________
Wrangler TJ 4.0 Sport
33x12x15's
4.88 R&P's
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