Draker
Well Known Member
The one last thing blocking my (IO-360-M1B) first flight test is an incorrectly set idle mixture. I'm still seeing no RPM rise when pulling out the mixture, which indicates an overly lean idle mixture. Tried rotating the idle mixture adjustment wheel on the servo in the "enrich" direction. The only effect it had was to reduce my idle RPM to the point where it wouldn't even idle--obviously there is interplay between idle speed and idle mixture so you need to get them both right. I don't have a good intuitive feel for how much I need to rotate the wheel. 1/4 turn to enrich it properly? 1/2 turn? 3 turns? 10 turns? Who knows? I'm kind of fumbling around in the dark. Then, once I get it right, my idle speed will be off, so I'll need to re-adjust the screw again, which will throw off the idle mixture maybe? Good grief!
I fear that doing this by trial and error is going to cause me to start and stop the engine 100 times before first flight. That doesn't sound nice for a brand new build. Should I be worried about limiting the number of start cycles before I get off the ground?
Also, yes, I know you can do adjustments on a running engine, and no, I won't be doing that.
I fear that doing this by trial and error is going to cause me to start and stop the engine 100 times before first flight. That doesn't sound nice for a brand new build. Should I be worried about limiting the number of start cycles before I get off the ground?
Also, yes, I know you can do adjustments on a running engine, and no, I won't be doing that.