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I forgot to pull the shut-off valve in my plane (PZL-110 Koliber 150) while I was trying to start an engine. Will this have any effect on the plane?

It has a mixture supply knob and is a pull/push type. I have pushed in and, according to the checklists, it should stay on the pull position while the engine is not running. It is also a low-wing aeroplane.

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    $\begingroup$ What kind of airplane? $\endgroup$
    – GdD
    Commented Jun 30, 2022 at 20:13
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    $\begingroup$ PZL Koliber 150. Like C172N with carburetor. $\endgroup$
    – Kamil1598
    Commented Jun 30, 2022 at 20:16
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    $\begingroup$ You need to explain more. Was in OFF or out OFF? Is it a push pull knob? What does the POH say to do? I have a low wing airplane with a carbureted Lycoming, and I never turn the fuel off unless I'm working on the fuel system. That is, the fuel is ON 24/7. $\endgroup$
    – John K
    Commented Jun 30, 2022 at 20:36
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    $\begingroup$ Sorry, i mean a mixture supply knob, it is pull/push knob. I have pushed in and according to the chcecklists it should stayed on pull position while engine is not running. It is also low wing aeroplane. $\endgroup$
    – Kamil1598
    Commented Jun 30, 2022 at 20:50
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    $\begingroup$ Please update the question with the details from your comments. $\endgroup$
    – AcK
    Commented Jul 1, 2022 at 16:22

1 Answer 1

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A mixture control left at full rich has no effect on a carbureted engine when it's not running. It's just a best practice to cater to, say, some situation where someone moves the prop by hand (and they don't bother to check the controls) and it could potentially put a fuel charge in a cylinder (if they flip the prop fast enough), and maybe somehow it could fire and kick the engine over (that generally doesn't happen on a cold engine - but maybe there is a hot mag that went undetected; lots of what-ifs).

Anyway, it's a procedural fault, but no big deal.

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    $\begingroup$ I think you forgot the most important part - Take your wet noodle lashings and never do it again! Or else! ;) $\endgroup$
    – SnakeDoc
    Commented Jul 1, 2022 at 17:42

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