Backing out air/fuel for sync....why?

[ChiefP]

Hello all. I was in the military for 30 years, so I have no problem blindly following instructions. But I'm going to sync my carbs again and I'm wondering why do I need to back the air fuel screws out a turn first?

 

[dannymax]

First I even heard of that!......:ummm:

If it's running good, leave the mixture screws alone and sync 'em.

 

[Traumahawk]

Well I can tell you one thing....Ive never done that.

 

[dannymax]

Well I can tell you one thing....Ive never done that.

And...he's a sync-o-holic! So am I actually! :biglaugh:

 

[Traumahawk]

And...he's a sync-o-holic! So am I actually! :biglaugh:

Anytime Ive done anything with the carbs....I always sync afterwards....even if I dont have to.

 

[DMAN999]

I've synched my carbs every Spring since 2002 and I've Never touched the A/f Screws to synch them.
I do set my Idle up to 1500-1800 to get a bit higher readings to make the synch easier to read though and just reset it to 1000-1100 when I'm done.
Someone gave you some incorrect Vmax Carb Synching Instructions.

Read this Guide by maleko89:
https://dl.dropboxusercontent.com/u/55030067/Carb%20sync%20procedure%20sept11.pdf

 

[ChiefP]

Glad I asked, lol. Now I can't find the "how to" that said to back each one out a full turn first. In my defense, it didn't make sense, hence the question. Thanks guys.