Two different carbs

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JimmyC
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Two different carbs

Post by JimmyC »

I seem to have two different carbs. I believe one is what they call "small idle mixture" and one is "large idle mixture". Is it ok to mix?
Jim Chance
710M

All my post fully incorporate the Dunning-Kruger effect
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TechMOGogy
Canada
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Re: Two different carbs

Post by TechMOGogy »

Never knew that - I unfortunately have nothing to offer but have subscribed to your thread as I am interested!
Dan
72 Pathfinder | 75 710M 2.7i | 96 350GDT Worker
JimmyC
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Re: Two different carbs

Post by JimmyC »

It looks like the difference is that on one the idle mixture screw can be sealed so it will not be tampered with. My guess is that it was for pollution control. So far cannot detect any other difference. Jets are the same.
Jim Chance
710M

All my post fully incorporate the Dunning-Kruger effect
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pcolette
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Re: Two different carbs

Post by pcolette »

If I remember correctly the only differences are the throttle body and the type of adjustment screw, large or small. I think the throttle body will only work with one kind of screw so they have to be matched.
Paul C.
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'73 Swiss 710M
'89 Puch 230GE
JimmyC
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Re: Two different carbs

Post by JimmyC »

I looked in the junk pile that came with the truck and found the "big screw" throttle piece. I am going to try to make them match.
Jim Chance
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All my post fully incorporate the Dunning-Kruger effect
undysworld
Norway
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Re: Two different carbs

Post by undysworld »

You should be aware that the throttle base (part 73 here: http://www.pinzgauer.com/parts.php?cat= ... view=01-40 is sometimes replaced due to wear at the throttle shaft, leading to air leakage, leading to lean condition and an inability to sync the carbs at the proper rpm.

Unless your extra is just NOS, you should check it for tolerances.
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