which carby ?

[Fusion]

Howdy all :) , I'm not to far from fitting the engine in my landy and starting it but the carby that is on it is worn out and had it's day . It currently has the Zenith mounted on but i have a single throat Stromberg i could fit to the motor . Is there any better carbies out there to suit the 2.25 petrol engine ?

[graceysdad]

The standard Series3 carby is fairly reliable, you can use Holden Carbs but they need the right jetting or you are just wasteing fuel

[Blknight.aus]

Howdy all :) , I'm not to far from fitting the engine in my landy and starting it but the carby that is on it is worn out and had it's day . It currently has the Zenith mounted on but i have a single throat Stromberg i could fit to the motor . Is there any better carbies out there to suit the 2.25 petrol engine ?

urmmm IMHO the zenith is as good as it gets being simple economical (as economical as the 2.25 gets anyway) and with no problem when operating off road at angles.

ITs also easy to clean out if you happen to get crap in it and it can be done on the side of the road without too much stress.

[rangieman]

Howdy all :) , I'm not to far from fitting the engine in my landy and starting it but the carby that is on it is worn out and had it's day . It currently has the Zenith mounted on but i have a single throat Stromberg i could fit to the motor . Is there any better carbies out there to suit the 2.25 petrol engine ?

You can use the stromberg (HOLDEN) carbie , All that is needed is a adjustable main jet which is still available thru autobarn , repco or similar store

The jet goes in thru the bottom of the carbie and you adjust by a thumb screw in situ on the car

It is a good compromise:D

[graceysdad]

Alot of those old carbies have flogged shafts, if they can be rebushed they run better then ever, I had a strommy on a 2A and it was just never the same

[RobHay]

You have the best carby already fitted, The Zenith 36IV has all the attributes that you need in a 4WD vehicle, designed to operate at various inclines and very simple to maintain........having said that please feel free to re-place it with one of your choice, properly jetted of course.... you will then need to dispose of the Zenith.....I run a voluntary association for the re-homing of unwanted and abandoned Zeniths, if you PM me I will supply the address to send it and will even cover the cost of the postage.:)

[JDNSW]

The Zenith or indeed the Solex carburetter perform perfectly well on this engine, provided they are in reasonable condition. I have no experience with the Weber. The problem with a lot of old carburetters of any type is simply wear on the throttle shaft and bearings. This can be rebushed and the shaft replaced, and then fitted with an overhaul kit the carburetter will be as good as new in most cases.

The Stromberg has often been fitted because of availability, but is unsuited to this application, as the mixture changes on slopes, causing either flooding or cutting out depending which way the track leans, so it is not a good idea if used off road.

I would simply fix the Zenith - if you are not able to do it yourself, there are still a few carburetter repair places about.

John

[Fusion]

Thanks again for all the replys guys . It's the shaft that is flogged out and when the engine was running it was running that rich it was causing the engine to miss and fill my shed with black smoke .I didn't know there was a kit for the carby . thanks again guys :)

[JDNSW]

Thanks again for all the replys guys . It's the shaft that is flogged out and when the engine was running it was running that rich it was causing the engine to miss and fill my shed with black smoke .I didn't know there was a kit for the carby . thanks again guys :)

If it is running rich it is likely that the top cover is warped. Remove everything from the top cover and carefully lap it flat with wet and dry on a flat backing (e.g. plate glass). Then install a kit, and check that the float level is correct.

This should fix the problem; make sure the o-ring is being compressed as the top is tightened and that it's seats are clean and smooth. The only other thing likely to cause rich mixture is a leaking needle valve (included in the kit) or wrong float height, although missing or loose jets could also cause it.

Rebushing the throttle spindle is more complex and requires machining capabilities, but this would not cause the rich mixture - more likely to cause a lean idling mixture, which is, of course, adjustable, and erratic idling (idling speed won't stay set).

John

[UncleHo]

G'day Wannalandie :)

Rob Hay has just had his Zenith 36IV carby totally rebuilt be Duel Fuel in Caboolture, it looks like new, they did mine about 6 years ago, and it has just worn out again,will get it rebushed again:) Pm rob and he will give you the costs involved.

If the carby is making the engine blow black smoke it is running to rich,the Zenith Carby and also the Solex, the mixture adjustment is opposite to the Holden stromberg, IN=Weaker-----OUT = Richer so if you have been turning the mixture adjustment screw out you have been en-riching the mixture:( they also have a rubber "O"ring between the upper carby body (airhorn) and the carby body emulsion block, if you are interested I have some Zenith minor carby overhaul Kits available that include the "O"ring, PM if interested.

cheers

[Fusion]

Hi UncleHo , I didnt get to play with the carby . it was running that way when we got it . Did those kits you have come with the bushes for the shaft ?:)

[RobHay]

Hi UncleHo , I didnt get to play with the carby . it was running that way when we got it . Did those kits you have come with the bushes for the shaft ?:)


No they do not, I have some here as well which I accquired from Uncle.

If your shafts need re-bushing, and I would suspect that they do you will be better off getting an expert to do it, unless of course you possess the ability to do the job yourself but will possibly envolve some machining which is way beyound my ability. I put mine into Dual Fuel here in Caboolture, They did a fantastic job. Cost was $250.00 for a total rebuild of the carby. What I have now is a brand new carby. Dollars were abit high but Hey! I would not have got much change out of $300 if I had of ordered a new one from the UK.

This one came off the Fire Tender and whilst it was running fine, accelerate when it should and idle when it should it had this rather annoying habit of leaking large quanities of fuel out of the shaft onto the exhaust manifold, and as I am all out of marshmellows the resulting fire would have been of no use to me:D

[Designosaur]

The Zenith or indeed the Solex carburetter perform perfectly well on this engine, provided they are in reasonable condition. I have no experience with the Weber. The problem with a lot of old carburetters of any type is simply wear on the throttle shaft and bearings. This can be rebushed and the shaft replaced, and then fitted with an overhaul kit the carburetter will be as good as new in most cases.

The Stromberg has often been fitted because of availability, but is unsuited to this application, as the mixture changes on slopes, causing either flooding or cutting out depending which way the track leans, so it is not a good idea if used off road.

I would simply fix the Zenith - if you are not able to do it yourself, there are still a few carburetter repair places about.

John

Hey interesting thread, mind if I ask about going the other way? Can you put a Zenith on a 202 to replace a worn Stromberg?

Cheers
Bernie

[Davo]

Hey interesting thread, mind if I ask about going the other way? Can you put a Zenith on a 202 to replace a worn Stromberg?


No . . . the 202, at about 1 litre bigger than the 2.25 the Zenith is meant for, needs better airflow.

I'm sure you could do it if you were truly stuck, but better to use the carby meant for the motor.

[Designosaur]

No . . . the 202, at about 1 litre bigger than the 2.25 the Zenith is meant for, needs better airflow.

I'm sure you could do it if you were truly stuck, but better to use the carby meant for the motor.

Thanks for that, the bit about them working better for offroad sparked my interest. Can just hunt around for one which is a bit better.
cheers
Bernie

[Aaron IIA]

"Zenith Carby and also the Solex, the mixture adjustment is opposite to the Holden stromberg, IN=Weaker-----OUT = Richer so if you have been turning the mixture adjustment screw out you have been en-riching the mixture"

Are you sure about this? As far as I knew, the mixture screw on the solex was an air bypass screw. The more you wound it out, the leaner the mixture got.
Aaron.