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Carburetor questions.

A

Andrewackart

New User
Why does it seem that carburetors on older tractors, combines etc seem to work better then the ones on older cars and trucks? I bought a combine that had been sitting in a barn since 73' and all it needed was a new battery and some fresh gas and it ran perfect. my truck on the other hand is a different story, i bought a new carb for it about three years ago and every year i've had to adjust it so the engine will run smooth, and the more i think about it i've never had any carb trouble on any my older equpment, just on cars and trucks. Any body got any ideas as to why this is? And if i posted this in the wrong section i apologize.
 
The primary reason is complexity. Auto carbs were pretty simple from the beginning to the mid 1950s. Then with multi carb setups
and 4 barrel vacuum controlled secondaries, things became very complex. My 57 jeep CJ3B has a simple one hole carb that is stone
reliable. Add to that the emission controls on 60s and later automobiles (till Fuel injection became standard) and it triples the
complexity. Jim
 
It depends on the carb of course, but in general, "most" car/truck
carbs have accelerator pumps and "most" old tractor carbs do not.
Not saying that's the only reason, but in my mind, part of the difference.
 

Most tractor carbs are as basic as it gets they make everyone a carb guru. #1 they are controlled by hand and a governor..

Throw in a accelerator pump and a power valve and tractor carb gurus are at a lost... It must be junk lets get a conversion carb that don't have that chit... Lets use a Holley used on Ford thousand models 99.9% of tractor carb gurus recommend Holleys are junk that junk when fact be know its as simple as it gets I have never seen one yet that could not be repaired brought back to life and out perform any replacement carb offered..

Real men control a carbs with there foot...
 
(quoted from post at 22:21:26 10/02/17)
Most tractor carbs are as basic as it gets they make everyone a carb guru. #1 they are controlled by hand and a governor..

Throw in a accelerator pump and a power valve and tractor carb gurus are at a lost... It must be junk lets get a conversion carb that don't have that chit... Lets use a Holley used on Ford thousand models 99.9% of tractor carb gurus recommend Holleys are junk that junk when fact be know its as simple as it gets I have never seen one yet that could not be repaired brought back to life and out perform any replacement carb offered..
Click to expand...
Nice to know we agree on this one. My 3000's still have Holleys. Accelerator pump and all.
 
(quoted from post at 19:21:26 10/02/17)


Real men control a carbs with there foot...
Click to expand...

So true. And a little help from a manual choke. The old Holley "teapot carb" on my 52 Merc works pretty good and will be even better once I replace the accelerator pump. Couldn't wish for a smoother idle. Manual choke conversion means I have more control over starting, idling, etc. The old Rochester single barrel on the Chevy sixes seem pretty simple and reliable. And I'm trying to remember just how many years it has been since I've had the quadrajet off my Oldsmobile for any kind of work. I can't.
 
They were built to be as trouble free as possible.

Not just the carb, but the whole machine!

The theory was, this piece of equipment could end up anywhere in the world, far from any dealer support, professional mechanics, or even a parts supply.

They were designed to be field serviceable, capable of withstanding the elements, be practical, universal, and last for decades.

Planned obsolesce hadn't been thought of yet!
 
Designed to run at constant governor speed and not to be continually going from idle to different higher speeds quickly. Economy was not the concern 70 years ago.
 
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