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MG Midget and Sprite Technical - Carb Linkage

I think I have spent over an hour trying to get the HS2 Carbs in with the linkages on. What an awful job. Now that I have it all in, do I have the two linkages on the right way.
Thanks chaps.
Allan


Allan Jacks

they look okay to me, But the choke linkage, (closest to camara) there is something wrong, its out of wack, I fear sticking and fast wear, I dont think its seated correctly esp. at the nut on the right side (rear) carb.

congrats on getting the head back on...what did you end up doing, last we talked, you had gotten another head, and where thinking of vizard porting and hardened seats and cleaning up the valve faces


Prop
Prop***The End in 2012

btw. did you use the locator rings when installing the carbs.


Prop
Prop***The End in 2012

I still have to tighten the screws and reattach the cable for the Carb, just wanted to make sure I had the two linkage pieces in the middle the right way. OK what locator rings?
I got the reconditioned head and put that on. I now have two other heads, one I know is good, the other one I just took off. This was a pain of a job and if I knew it was that bad I would have taken some photos, but I thought the Carb came off as one piece.
Even the screws to mount the carbs are a pain.
I do have one thing I am going to see if I can find where it goes. Its a long pipe with a tsection in it, about 1/8" I am thinking it is for smog head.
I would have gotten back to this earlier, but my dog has been sick and after several days at the vets, he passed on. He didn't even get to ride in the midget.
How long before you get everything together.
Thanks,
Allan
Allan Jacks

So sorry allen

About the dog and the carbs (rings) they go between the intake and the cly head, this is to line up the holes between the 2 inoreder to prevent obstruction, the rings are about 1 and 1/8 dia. 1/2inch long and 1/16' thick and shold be 2 of them, they insert into the grove in the intake holes on the head and manifold.

On my project, Im waiting till the weather turns better, I only need a few more parts, but I just dont want to spend the money right now.

So Im guessing in the next couple weeks Id really like to have it done by april, so will see.


prop
Prop***The End in 2012

Allan,

Trust me, it gets easier to do each time you do it. The first time I remember putting the carbs back on the car after I got it from my dad, I accidentally hooked up the choke cable to the throttle linkage and the throttle cable to the choke linkage. Much confusion, head scratching and frustration ensued.

In general, the best way to go about it is to put the linkages between the carbs and then slide it on as one unit. The tricky bit is always getting the nuts on the studs that hold the carbs in place. Its not that bad but you mustn't slide the carbs on completely before threading the nuts, otherwise you'll have a tougher time getting them on. You have the linkages in the right place alright, I can't really tell from the photo if the pie slice shaped bit on the throttle linkage is with the fat end towards the camera (incorrect) or away from the camera (correct). For now, keep the nuts on the linkages slack so you can make adjustments as you go. This is essential when you're tuning the carbs anyway. I usually like to adjust the angle of the throttle linkage so that when I floor the pedal, the throttle is as far open as it will go.

I figure another hour of work at the most would be enough for me to get it reassembled from where you got it. Some of that time would likely end up with me working on tuning the carbs.
S.A. Jones

ps, by tuning the carbs I mean just checking things like fast and slow idle screws, and the clearance on the linkages. I t looks to me like some of those are out of adjustment. If and only if the car runs rich or lean do you need to think about messing with the mixture adjustment nut on the jet.
S.A. Jones

Thanks, Yep the linkage is pointing away from the car. I have not done the carbs before so this is going to be an experience. I have the parts and I have an SU tuning book techniques. the blue one.
I have the valves to adjust, the carb to put tune and then lets see how well I can follow direction. I have Friday off, so all going well I will have it on the road net week.
On the carbs, how often should the springs be replace .
Thanks,
Allan
Allan Jacks

on the the 3 throttle springs???

I replaced mine last year after 38 years being orginal, they just stoped flexing/springing, So I went to home depot and matched up the springs to the old ones and guessed how strong they should have been, missed it the 1st time as they where to strong, 2nd time I went much lighter and got the springy really good, Info just incase you didnt want to wait for new springs inorder to drive

prop
Prop***The End in 2012


Allan - looks OK to me. Took me 3 gos to get mine right, despite photos from every angle and three sketches!! A real head-scratcher..
MarkH1

Throttle return springs last a while, buy a few spares to have on hand and replace them when the hook snaps off one end. In a pinch you can bend a new hook and reinstall it but this doesn't last as long as a new spring does. It's also a good idea to carry a spare throttle cable. They wear out and if you leave one in poor condition on too long they can break. It happened to me. there was kink in it and the cable was sawing back and forth over a break in the housing.

What do you mean by the linkage pointing away frpm the car?
S.A. Jones

This thread was discussed between 07/03/2009 and 08/03/2009

MG Midget and Sprite Technical index

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