Uaz carbs K129 and K131

[K Berg]

Well, I found a bit of info on the carter bbs, and holley 1920, and 1945's


http://u225.torque.net/cars/SL6/docs/Ca ... Manual.pdf

http://u225.torque.net/cars/SL6/docs/Ho ... Manual.pdf

http://u225.torque.net/cars/SL6/docs/Holley_1945.pdf

Note that these carbs and instructions are for the chrysler 225cui slant six, so some settings will have to be tweaked to suit the very different engine.

[Ditch]

I've done about 150 miles in the Uaz now and decided yesterday that it was a good time to try the K131 again as all the ignition problems are sorted.

Fitted the carb and it started OK but tickover was all over the place an a hissing noise from the carb. Float level was wrong again so I split the carb and found that the replacement gasket I fitted was perfect in shape apart from one point where it is supposed to seal a hole from the top casting to the bottom. Instead of having a hole in the gasket it profiled round the inside of the hole, leaving it venting to the outside when the two halves are assembled.

Refitted the old gasket and whoopydo the thing ticks over reliably. Took it for a spin and it feels better all over the range apart from picking up from tickover where it bogs a little bit.

There is a bit more to ajust on the K131 and I'm pretty sure the one on the right is the tick over and the one on the left is the mixture screw (tickover). They reacted right when fiddled with. Car still smells pretty rich but the plugs look right so I presume it doesn't burn very efficiently. Pretty chuffed so far.

[haymish]

acquire a weber of some poor unsuspecting land rover owner[series 11a or 111] .should bolt straight on,real easy to get spares,bigger jets etc,and a doddle to set up.with lr's you get more power and more mpg.pm me your address and i'll stick one in the post!

[haymish]

one very grubby carb in the post.came off an offroader that ran very well till its owner forgot it needed oil! it's a late one[1998] so got big fat pipe out of base-its just an emission thingy-so blank it off.jets etc should be about right cos off a 2.5l engine putting out 85ish bhp.once you have got it up and running dont forget to tweak the timing a little bit-cos more efficient carbs like a little more advance cos fuel mixed better etc. haymish

[Eastblock]

Keep us posted on how the Weber works on the Uaz. I'm keen to find out.

Michael

[Ditch]

Thanks Haymish I will keep you all posted.

[tarhim]

K-131 carb is little harder to set then 129 or olders - by the time it was made, Soviets started to care (at least a little) about emissions, so it has one extra screw to control fuel mix as to minimize CO content.

Also, it has half-automatic choke and in some versions, electrical fuel-saving valve (closes fuel flow when engine braking).

Still, it's best carb I have, at least it doesn't leak.

[Rob Reznik]

I have the 129 fitted to the Uaz469 I have just finished and am using ( well when it passes the MOT tomorrow) - it runs well with the standard carb but I have a spare 131 I was thinking of putting on - is it supposed to run better or is it just to save fuel? - if just fuel I will leave the old one on as its OK and I am running on contaminated petrol so fuel consumption is not so important.

[Ditch]

I've run my Uaz on both carbs and there is a bit of difference with feel but very little difference with anything else. I could believe that the K131 uses less fuel.

The K131 has a removable sleeve in the main throat of the carb. I never got round to running with it removed. Looks like it decreases the bore size when fitted. Any ideas?

When I get the clutch sorted I will have a go with the LR carb that Haymish sent me.

If anybody needs K129 parts I have a box full here.

[tarhim]

Rob, if 129 runs well, I would leave it in place. If your 131 has any kind of electric connections, I wouldn't touch it with 6-foot pole. All in all, I'm quite satisfied with my 131, engine starts after one or two turns with it, can't say same thing about 129.

I still can't set neither carb properly, however. Still stalling without choke when running on petrol.

[haymish]

either carb built for bigger engine or sleeved to cut down power.brit army v8's sleeved in top of manifold to reduce umph.

[flockee]

all very well, but who has a repair kit for a K124? lol, my old sidevalver needs a new breathing tube, this one has a knackered float valve, and leaks like a sieve

[funkypete]

I know this is an old post im dragging up, but me and chris breifly talked about carbs, and swapping etc. Any more news on how engines are running few years down the line with different carbs on??

Mines the old one with sightglass in float chamber.

[tangowhisky]

The great thing about the Weber alternative on the Gaz is that it pretty much just drops straight on.

So what model of Weber would that be then? The more I read around the topic of Russian Carbs for the GAZ69 the more persuaded I am becoming to go the Weber route instead. However, I am no engineer and therefore I'd pretty much need something that drops straight on rather than having to make adapter plates, left hand widgets or other bespoke detritus.

[haymish]

the carb i sent ditch was a weber 34ICH.the other lr carb to concider is the zenith 361v.both good carbs -zenith easier to set up and weber probably more fuel efficient.from memory only hassle fitting them was sorting out the throttle linkages.
some weber 34ICH came with an adaptor plate to turn them through 90 degrees cos needed it to sit same way as zenith on lr's.plates easily available.

[Dominik]

I've bought old, unused K131 carb, need to setup it.
Do anybody got manual for K131 carbs?.

[funkypete]

Bolt it on and fiddle. Its only got 2 adjuster screws, but i cant think what they do

[Dominik]

I've got something here (in Russian): http://avtomechanic.ru/karbyuratori/sis ... tora-k-131
I can read Russian, so wont be a problem. ;)

[RangerNeil]

Bolt it on and fiddle. Its only got 2 adjuster screws, but i cant think what they do

Mixture and idle speed????

[funkypete]

Bolt it on and fiddle. Its only got 2 adjuster screws, but i cant think what they do

Mixture and idle speed????

Yeah sounds good!!

I handed over to my Russian truck race tuning expert by this point to set it up, after I bolted it on.