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willysmjeeps.com :: View topic - M38 A1 Carburettor screws
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M38 A1 Carburettor screws

 
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pduske
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Joined: Feb 01, 2006
Posts: 25

PostPosted: Sat May 30, 2020 7:17 am    Post subject: M38 A1 Carburettor screws Reply with quote

I tried to adjust my carburettor correctly today.
I gently drove in the mixture screw into the seat and then backed it off 1.5 turns. Loosening the idle rpm screw was not possible because the engine would die off.
From wer I played with the Mixture Screw both directions with no reaction by the engine, even when I drove in the mixture screw into the seat.

Is this normal?
What is your approach adjustingThe Carter YS ?

I appreciate your advice and support.

Thank you
Philip
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wesk
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Joined: Apr 04, 2005
Posts: 14915
Location: Wisconsin

PostPosted: Sat May 30, 2020 8:47 am    Post subject: Reply with quote

The mixture screw result is a common occurrence when you have an induction system (Vacuum) leak elsewhere in the induction system. Do a propane test looking for a rise in RPM when the propane is sucked into the leak.
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