Help - pilot mixture screw

[flyingace]

On an 850 CV carb, does the pilot mixture screw control the amount of air into the pilot circuit, or the amount of air/fuel mixture? I'm experimenting with eliminating an over-rich condition on #4 at idle and not sure which way to adjust this screw.

Thanks,
Ace.

[Hoomgar]

It adjusts the mixture of both. My understanding is that turning the screw out richens the mixture while turning in leans.

[flyingace]

Thanks Hoomgar - always appreciated.

That is consistent with name 'pilot mixture', but I didn't know for certain.

Ace.

[Jethro]

That is correct. It effectively richens the mix as you turn it out by adding a fatter mixture.

Make sure your #4 float isn't sinking and is set correctly. And eat your Wheaties.