Asan Carby Help Choke Related

[solja]

Hi Guys.

Our 2T has the asan carby with automatic choke on it. The Copper line is broken at both ends, we live in Central Queensland so the weather isn't ever very cold but it still requires a bit of a choke start early on. I'm wondering is it in any way easy to hook up a cable to the choke butterfly? I see the black Climatic Control Cover on the end of the carby I haven't taken it off yet to inspect - am I on the right path?

["Z" UTE]

Yep you are looking at the right end of the carby. Unfortunately the damper piston and other moving bits in the auto choke assembly are probably all crusty after a few years of that pipe being broken. I ran an mS65 Crown for 15 years without a functioning choke down here in Canberra. I simply gave the accelerator a couple of pumps before turning the key. The function of the choke is to temporarily restrict airflow volume which richens the mixture, a couple of pumps of the accel pump achieves the same outcome.

That being said if you still want to go ahead with the choke change, grab an old carb off an early Corolla and switch the choke bits over. Waaaaay back in the day REPCO had a conversion kit on the shelf do delete the auto choke.

Before you go to the expense of changing anything I would check to see if the choke butterfly actually moves when you prod it with your pinky. If you have movement then the gutz may not be all gummed up, If that is the case why not reconnect the auto choke. Just get some copper pipe or even brake line will do.

The air circuit goes like this. Starting at the carby there is a rubber line from the carby air cleaner base plate to a hard line that runs across the front of the engine then into the exhaust manifold, the line exits the exhaust manifold at the rear then finds its way round the back of the cylinder head then up to the carby choke mechanism.

There is very "airflow" within the hoses and pipe. The air is heated within the exhaust manifold and that heat acts on the spring in the auto choke, as the spring gets hot it loses tension and allows the choke shaft to rotate opening the choke. The major failure in these systems is pipe within the exhaust manifold, if that cracks unrestricted extremely hot exhaust gases pass to the choke mechanism frying the guts. After market extractors had an external tube welded to them to serve the same air heat function. If the pipe within your headers is broken simply strap a pipe to the outside like the extractors it will do the same job.

Hope I have not overloaded you with info,

cheers Chuck.

[solja]

Hi Chuck. thats an awsome post and fantastic Info. The Exhaust manifold side is broken off so it seems hard to reconnect it without some large degree of dificulty i figured if i could pop a wire in would save me lots of hassels. the butterfly works a treat at present i can start the car it coughs n splutters and stalls often cold. hold the butterfly closed n its sweet as after it warms up its great. car hasnt had a good flogging in many years so it might not b such a problem after it's first outing in coming months

[king-szeitszam]

I always had nothing but problems with the auto-choke on Aisan's. Eventually I got tired of it and converted every carby choke I used to manual; there's just no way it can go wrong...ever.

Repco still sells those kits- or they did as of 8 months ago. They're about $40.
I can have a look around and see if I have a spare. If I find a cable/kit you can have it for free as I have no use for it.


Auto choke is cool, but all that hassle just to avoid sticking your hand out and pulling a knob on the dash just isn't worth it IMHO.

[solja]

I always had nothing but problems with the auto-choke on Aisan's. Eventually I got tired of it and converted every carby choke I used to manual; there's just no way it can go wrong...ever.

Repco still sells those kits- or they did as of 8 months ago. They're about $40.
I can have a look around and see if I have a spare. If I find a cable/kit you can have it for free as I have no use for it.


Auto choke is cool, but all that hassle just to avoid sticking your hand out and pulling a knob on the dash just isn't worth it IMHO.

That'd be super if you could do that kingy!! let me know how you go and I can arrange to send some $ for postage at the very least!. if not do you know what the kit is called or some sort of number at Repco - the local store is hit and miss with being helpful finding difficult things, I think they have a lot of new ppl.

[crownv8]

If the choke mechanism is working fine I have had success converting that type of choke to electric. That "black climate control" cap can be replaced with an electrically heated cover from a later model. Then connect the wire to an ignition source.

This gets rid of the troublesome exhaust heated part. The last of the carby Crowns had an electric choke.

[solja]

thanks. I think for our application a cable would be best but it's good to know there's some options. might have a look at pulling that climatic control cover off and seeing what could be jerry rigged up.

[king-szeitszam]

That'd be super if you could do that kingy!! let me know how you go and I can arrange to send some $ for postage at the very least!. if not do you know what the kit is called or some sort of number at Repco - the local store is hit and miss with being helpful finding difficult things, I think they have a lot of new ppl.

Yeah no probs mate. It'll be in storage if its anywhere so you'll have to wait till the weekend to find out if I still have it as I'm doing 12 hour shifts this week.
Depending where you are in QLD i'm positive the bigger Repco's will have them. I'm in south Brisbane and the two local stores carry them. I believe if you walk in and simply ask for a electric to manual choke conversion kit they'll know exactly what you're on about.

[solja]

thats cool. will c how u go and drop into repco after that if need be.

[solja]

How'd ya go kingy any chance to take a look for the choke?

[king-szeitszam]

Hey mate,

I looked everywhere and couldn't find any component except for the cable itself, which has been cut to suit whatever application it was in before.
I went over to my local Repco to find the conversion kit for you and they have it listed as part number "Mgmcck" and most stores should have them in stock.

Hope that helps, sorry I didn't have one for you

[solja]

Hey mate,

I looked everywhere and couldn't find any component except for the cable itself, which has been cut to suit whatever application it was in before.
I went over to my local Repco to find the conversion kit for you and they have it listed as part number "Mgmcck" and most stores should have them in stock.

Hope that helps, sorry I didn't have one for you

What a trooper!! not only were you keen to just hand me over something but you went out of your way to find a part number. Appreciate it very much! maybe down the line somewhere I might be able to repay it and have something you're chasing. can give you a snapped bolt, a broken ratty old rear seat or a split radiator hose right now... lol thanks again mate!!!

[solja]

ahhh its a great place to live Gladstone QLD. massive port massive industry fk all care in the world for people who live here... went to repco they dont have the choke in stock and they want to charge me freight to order it in. and NO where in town on a weekend has an M10x1.25x100 bolt. its hopeless to do anything here. she told me to come back during 8-4 weekdays so she can call the supplier to get one ordered and get exact price and freight. funny that MOST people work those standard hours or longer...

[solja]

lol sorry bout my little post there... was letting off some steam. after I calmed down I thought FK the local people I'll go online. ebay ofcourse.... where else... bought a conversion kit for $15 from VIC comes with a ton of mounting hardware and plenty of cable 160cm long... http://www.ebay.com.au/itm/Choke-Con...a987634&_uhb=1 Repco wanted $28 for the kit then $10 for freight from supplier to the store

[king-szeitszam]

Glad to hear you worked it out in the end mate. Yes I always thought the Repco kits were more expensive than they were worth, but I could never be bothered to look for an alternative.