ORIGINAL: Augie11
ORIGINAL: DenverJayhawk
I've never really used the pinch test on my 46fx or 95ax when initially setting low speed mixture. I just let it idle for 10 seconds and then move it to full throttle quickly. If it spits or sputters, I'll lean it out a 1/12 of a turn. If it immediately dies, I'll richen it up 1/12 of a turn and try again. Once I get it to how I like it, I'll go full throttle and give it a quick pinch test to see what it does.
For my O.S. engines, I've never had luck with the #8 plug. I had to use a hotter A3 plug in the .46 and an OSF for the 95AX.
DJ actually uses the method recommended in the manufacturer's instructions for setting the low speed needle. How refreshing! Imagine if someone next suggested using a tach to get the right high speed needle adjustment and then backing off 200 rpm to fly? I haven't used the pinch test in 20 years.....about the same time I had my last in-flight dead stick.
Hey DJ a little surprised to hear of your problem with the #8 plug. I have gone with an OSF on inverted 2 stokes with good success.
Yes, with the #8 plug I would get a stall as soon as I removed the glow driver. For that reason, I could tell the plug was not hot enough. I tried an A3 plug with the same results. As soon as I tried an OSF, preso, no more issues.