Gav

[majohnson00]

Somebody please explain how the GAV works and why. 31 Model A Tudor, Zenith carburetor. Thanks, Marv
majohnson00@aol.com

 

[Mitch//pa]

Read through this

http://www.motormayhem.net/wp-uploads/2009/04/Model-A-Instruction-Manual.pdf

 

[SteveB31]

or try this


http://modela.org/gav_seat.html.....

 

[Mitch//pa]

Steve I reference your carb site often
Thankyou

 

[majohnson00]

Steve, Exactly what I was looking for. I have the big Model A Service manual, but it really does not explain it (to me, anyway), like the link you sent. Thanks, Marv

 

[TinCup]

Or try http://modelabasics.com.

 

[Mike V. Florida]

If you still have a question let us know.

 

[BILL WILLIAMSON]

On setting the GAV, Chiefs' system was: "With a warm engine, run at a CONSTANT speed of 20 to 25 MPH in second gear & adjust your GAV for the BEST, SMOOTHEST RUNNING"
And IF your GAV setting affects your idle, YOUR IDLE SPEED IS TOO FAST!
Bill W.

 

[mshmodela]

Check out page 7: Nice drawing that Tom Endy did:

http://modelabasics.com/Carb/ZenithPassageways.pdf

 

[Benson]

Another helpful thing about the GAV:

One turn is good to begin with for cold starts.

If you start the engine and it dies in 1 or 2 seconds.

Open the GAV some more (counter clockwise) Like if temperature is below freezing.

Close GAV as it warms up.

Normal position after warm up is a 1/4 turn off the seat.

Be gentle when closing GAV it is a brass needle and early ones have a brass seat also ... it is easy to damage these parts.