RE: Sundowner 50 Arf
I could attempt to describe how to set the low end mixture...... but that is one of those things that is most defineatly best learned from your club members or flight instructor.
Start the engine,
take it to full throttle for 30-45 seconds to warm it up and clear it out.
Pull the engine to idle (around 3000 rpm).
Allow it to stay there 5-10 seconds.
Advance the throttle rapidly.
If the engine stumbles and loads up, turn in the low speed mixture about 1/4 turn.
Try again.
You are looking for a smooth transition from idle to full throttle.
If it quits immediately as you throttle up, it is lean, and you adjusted in too far.
Back out 1/8 of a turn and try again.
Once it transitions well, allow the engine to idle for 30 seconds.
Advance the throttle quickly.
It should not faulter. If it does, only tiny adjustments from that point.
Chances are it will be perfect.
Oh.. forget the fuel pump . Its a bandaide for a problem. Fix the problem.