setting timing

[garycroix]

Now the mixure suggestion makes sense, that actually crossed my mind today. Is there anything to setting the mixture besides the screws on the bottom of the carb, and what is that procedure? I've heard screw them all the in, then back them out 1.5 turns, but that's all I know. Thanks!

[garycroix]

Found this from one of Dragon's posts:

Set both idle screws at 1-1/2 turns then turn one in until the engine gets sick. Turn it back out until the engine gains the most speed. Now do the same to the other side. Adjust the idle speed to where it belongs.

[Dragon]

Okay not all dizzys are set that way the later they are the less likely they are. My 71 books only show one setting for the dizzys.

The vacuum leak is not that big it is a lot smaller than the hose so it would very slightly lean out the carb on one side.

Still Thinking.

Just had a brain aneurism or is that a fart.

The vacuum advance has a advance stop in the dizzy if it is missing the advance will go too far. It is a little bump that catches the supporting plate. It sticks off the bottom of the points plate and rides in a slot on the support plate under it. Also is the pivot shot, it has a snap ring that holds the point plate so that it rotates. If the vacuum advance moves the point plate back and forth instead of in a circle it would really change the points gap making the truck real sick.

Dizzy explosion.jpg

[fordman]

Found this from one of Dragon's posts:

Set both idle screws at 1-1/2 turns then turn one in until the engine gets sick. Turn it back out until the engine gains the most speed. Now do the same to the other side. Adjust the idle speed to where it belongs.

that sounds right.

Okay not all dizzys are set that way the later they are the less likely they are. My 71 books only show one setting for the dizzys.

The vacuum leak is not that big it is a lot smaller than the hose so it would very slightly lean out the carb on one side.

Still Thinking.

yeah a small leak like that possibly isnt too much right now. but it woudl help maybe narrow down things. atleast that is how i would start approaching this. fix what you kno wyou can fix and then look to the next problem.