Re: Ken's 1937 120 Touring Sedan

Posted by JWL On 2016/5/15 15:34:10

Ken, idle adjustment pretty much as you describe. Two things to coordinate: the idle speed and the idle mixture. After engine is warmed up and choke is fully released, get idle speed down to spec or as close as you can get (probably 450-500 rpm). Then adjust mixture turning in one of the jets until engine slows or starts to stumble then turn out 1/2 turn. Repeat on the other mixture jet. Adjust idle speed if necessary. Go back and forth between two idle mixture jets until best idle is achieved. Using a vacuum gauge is the best way to assure you have the best idle speed and mixture. Reading should be between 18 and 20 and steady. All of this with correct distributor points and ignition timing adjustments. Idle adjustment is the final step in a tune-up. These engines when running right are very smooth and quiet, so much that a coin can be balanced on the cylinder head. Hope this helps.

(o{}o)