Mixture Arm

[Taltruda]

Helping a friend with his condition inspection n his 8, the throttle wasn?t getting full open, the carb heat wasn?t going full cold, and the mixture isn?t t going full. We adjusted the mixture to full rich with a hair spring back on the quadrant (the mixture arm bottoms before the lever in the cockpit) but now it doesn?t allow for the mixture to go full idle cutoff. There?s not enough room to re drill on the throttle quadrant, and the current mixture arm only has the one hole. Anybody else come across this? O-360, carbureted, are there other mixture arms available?
Thanks in advance

[N941WR]

I did have this same issue with my O-360 and throttle quadrant.

It took a while but eventually I got everything adjusted right and it now works fine.

If you need, drill a hole further up the quadrant lever, this will give you more movement on the cable and allow it to go full rich to idle cutoff.

[Robin8er]

I've also heard people suggest using a shorter arm on the carb, however where to buy said shorted arm I don't know. The shorted arm would make it so there is more travel on the mixture on the carb.

[D Weisgerber]

Originally Posted by N941WR

I did have this same issue with my O-360 and throttle quadrant.

It took a while but eventually I got everything adjusted right and it now works fine.

If you need, drill a hole further up the quadrant lever, this will give you more movement on the cable and allow it to go full rich to idle cutoff.

Drilling a hole further up on the quadrant would decrease the amount of throw at the engine end.

[N941WR]

Originally Posted by D Weisgerber

Drilling a hole further up on the quadrant would decrease the amount of throw at the engine end.

Not so, it would move it in a greater (longer) arc, thus more movement.

Doing so at the carb would decrease the amount of throw. At the Carb, would want a hole closer to the pivot point to increase the throw.

[flynwest]

Don at Airflow performance has different length arms.

[N941WR]

Originally Posted by flynwest

Don at Airflow performance has different length arms.

For a carburetor? If so, putting a shorter one is way to go.

[Taltruda]

Thanks all, I?ll give Don a call the cable is already at the highest on the throttle quadrant..can?t get it any higher, so it?ll have to be a shorter arm at the carb!

[Taltruda]

Originally Posted by N941WR

For a carburetor? If so, putting a shorter one is way to go.

That?s what I?m thinking... where to get one? Someone recommended Don at Airflow, but he?s into fuel injection.. I need a carb arm.. MA4-5 carburetor..

[BobTurner]

Is it really close now? Is the mixture control arm clocked so it's 90 deg to the cable, half-way thru its travel? If so, you can gain a tiny bit of throw (more throw at the carb for less control movement) by re-clocking the arm, so the 90 deg point is not in the middle of the movement. This is less than desirable, as the further from the 90 deg point you move, the more sensitive it gets to control movement. But if you're really close now, it might work.