Zenith Carb

Bartolucci

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#1
I inherited a 61 Nash Metropolitan and had the 1bbl Zenith carb rebuilt. It wasn't idling right so I attempted to adjust it by ear. Running the idle/mix screw all the way in causes the idle to increase, running it out causes it to stumble some, but only to a point. Seems that I could run the screw all the way out of the carb! It's been a while since I've played with an old carb like this, but I thought one adjusts by running the screw in until the idle gets rough. This appears backwards.

It's a 1500 cc Austin motor with unknown miles, but seems 'tired' to me.

The car is in beautiful condition, but the engine is loud, rattly, and really slow. It sounds like an old motor boat.

TIA

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#2
OK Zenith caused the OLD memory cells to try and fire zenith = old Harley Davidson's and yes their idle setting was backward, opening caused more air (vacuum) to bleed off the idle system. So it would lean out opening

Suggestion - do you know WHICH carb is picture correct?
model 28 228 pictured
 

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Bartolucci

Full Member
Joined
Jan 19, 2007
Messages
96
Likes
0
Points
6
Location
Rochester, NY
Website
www.tonybartolucci.com
#3
OK Zenith caused the OLD memory cells to try and fire zenith = old Harley Davidson's and yes their idle setting was backward, opening caused more air (vacuum) to bleed off the idle system. So it would lean out opening

Suggestion - do you know WHICH carb is picture correct?
model 28 228 pictured
Hope these pics help... TIA.


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