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1. 07:27 PM - Re: Prolonged idling/taxiing (AlaskaChang801)
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| Subject: | Re: Prolonged idling/taxiing |
stephen.hayne wrote:
> This is a bit tricky to answer, because it depends on how the "cruise" mixture
screw has been set, and how the "idle" mixture screw has been set. There are
manual pages describing how to set these, but at 5000', I was running too rich
at idle. So, I turned the idle "in" (righty tighty), 3 clicks. Seems better.
>
> Then I did the same for the "cruise" screw (before installing an MGL FF3). Then,
at pattern altitude, on downwind, I would "push" (or pull in your case),
the mixture forward until I got noticeable power/speed reduction. Engine won't
fail, or sputter, but it will just "fade". If that happened when I was almost
at the stop, I feel like that is good, because then I can lean quite a bit
at altitude for cruise.
>
> After installing the FF3, I now lean for about 2.6gph at idle (noticeable idle
rpm rise), and then for whatever the book calls for at cruise, plus just a little
because it seems to be too slow at those gph... :)
>
> I don't think you can hurt the engine much, since it is carbureted. Tough to
get too "lean of peak". Read up about the 182 and "lean of peak" if you want
a controversy.
>
> You are likely at sea level, so I think that full rich at TO and LDNG is very
smart.
>
> But, I think you can play with the settings a bit (clicks) and if you can get
the engine to significantly slow just as you get to full lean, then you might
be in the sweet spot. Look for an RPM rise, an inch before getting to full lean,
maybe?
Thanks for the info and advice. I guess I've got to dig in a little deeper and
figure out what my mixture screws are set at and start from there.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=491840#491840
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