Quoted From a76montecarlo:
ok thanx for all the input guys here is some more info on the carb its not a 650cfm its a 600 and model #65-80457. i have also noticed when i was lookin for the modle # i saw that the jets on the 2 barrels on the rear of the carb where dripping gas(at idle). is this normal? i also have the brake booster connected to the main vacuum line on the back of the carb is this ok or shout it be directly on the intake itself. i know have alot of questions but any and all help is very appreciated.
There should be no fuel delivery to the secondaries at idle and certainly no dripping. I think the dripping is most likely caused by a problem in the rear float housing. The needle and seat may need to be renewed, the float may need adjustment, it may need replacement, and you need to check for proper operation of the secondaries after you’ve checked everything else. This is done by warming the engine, then opening to wide open throttle with your hand, observing the secondary throttle. When you do this, the ignition timing has to be correct or you may get a backfire up through the carb. You also need to check to see the secondary throttle is CLOSED at idle.
Also, you may have a bad power valve on the primary side. You can check by removing the front float bowl, removing the power valve and sucking on it. If it’s good, it will open.
Take care of the problem with the fuel delivery to the secondaries first. If everything works at that point, you don’t need to check the power valve.
I’ve had to live with a few electric choke carbs and I’d rather have a manual choke. I live in California and have adjusted electric chokes in Southern CA where the summer temp goes over 100. I’ve lived in Northern CA where the temp is 10 degrees cooler. I’ve never had to adjust an electric choke for below freezing temp. Here’s what I do – Set the choke in the summer. I disconnect the wire to the choke and let it cool off completely, then I open the choke halfway, then I connect the choke wire and start the engine. If it stumbles, I give it more choke, but I don’t recall having to do this. With the engine running, I observe the choke opening. It may take around a minute. This works for me in hot weather. When the weather cools off, I will readjust the choke.
If you’ve had an old vehicle or a motorcycle with a manual choke, you know what you want out of your choke.