Dear Ward;

It's the same as any other 6 cyl. Around 20" with the needle steady.

To adj idle on that: Turn mixture screw in all the way till screw stops then out 1 1/2 turns. Then start engine, screw in till egine "stumbles" (starts missfiring), then back out till smooth + 3/4 turn.

Next; Set the speed screw.

Good luck, John M., #3370...

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon