Thread: New 496 wont run??

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JMHO, but appears you have two problems;
1). There may not be enough initial timing on the motor.
2). Appears the carburetor is suppling too much fuel to the idle circuits.

I would give it a little more timing (turn distributor counterclockwise), and try starting it with just a 1/4 throttle. The carb may be too rich to start with a closed throttle, opening the throttle a 1/4 may be enough to get it off the idle circuit but not enough to be too lean when it's cold.
If that starts it, I would check the idle air bleeds in the metering blocks, occasionally a carb gets set wrong from the factory or may have something in the air bleeds (packing material). It could also have been modified by someone and sent back, then sent to you as new. Check it to be sure, if everything is clear and looks good and the air bleeds are the correct numbers, I would then contact the carburetor's manufacturer for further advice.

Ok I will try that tonight starting it with more advanced timing and open throttle, in the mean time here are the specs for my carb.

Barrels 4
Booster Down Leg
Brand Quick Fuel
CFM 830
Choke Electric
Circuit 2
Emission Code 3
Fuel Gasoline
Fuel System Carbureted
High Speed Air Bleed 28
Idle Air Bleed Size 70
Marine Use No
Material Aluminum
Model Super Street Series
Primary Main Jet 78
Primary Power Valve 65
Primary Pump Nozzle Size 33;35
Product Type Carburetor
Secondaries Mechanical
Secondary Main Jet 86
Supercharged Application No
Throttle Bore 1-3/4 inch
Part Number SS-830

So when you were bumping the engine over until the intake valve closed--------then just what exactly did you do???????

Originally Posted by jerry clayton

So when you were bumping the engine over until the intake valve closed--------then just what exactly did you do???????

Originally Posted by 36 sedan

JMHO, but appears you have two problems;
1). There may not be enough initial timing on the motor.
2). Appears the carburetor is suppling too much fuel to the idle circuits.

I would give it a little more timing (turn distributor counterclockwise), and try starting it with just a 1/4 throttle. The carb may be too rich to start with a closed throttle, opening the throttle a 1/4 may be enough to get it off the idle circuit but not enough to be too lean when it's cold.
If that starts it, I would check the idle air bleeds in the metering blocks, occasionally a carb gets set wrong from the factory or may have something in the air bleeds (packing material). It could also have been modified by someone and sent back, then sent to you as new. Check it to be sure, if everything is clear and looks good and the air bleeds are the correct numbers, I would then contact the carburetor's manufacturer for further advice.

So I got home cycled the motor over until I was at 15 degrees before TDC and on compression stroke for number one and lined up my distributor housing on the rotor for number one plug wire and after that I assembled and wired the dizzy and it was close to cranking, after I messed with the idle mixture screws put them one and a half turns out and opened up my throttle plates on my primary it started right up. I didn't have much time to mess with it after that so I will be putting a timing light on it but it seemed like it wanted a lot of advanced timing to run. I will update hopefully once I get a timing light on it and see if I can get it running right. Thanks