First engine start, how to prepare?

[Jesse]

Before doing major adjustments on the mixture, test it at 1700rpm to see where it should be. There is an idle mixture adjustment knob on the fuel servo for idle, and you can lean that out, but the idle mixture and non-idle mixture are somewhat independent (assuming the Silverhawk injection system).

On the rpm, just change the setting for the EI side. The fact that it doubled means that the EI is putting out different pulses and it trumps the mag side in the Dynon.

[airguy]

Originally Posted by Jesse

Before doing major adjustments on the mixture, test it at 1700rpm to see where it should be. There is an idle mixture adjustment knob on the fuel servo for idle, and you can lean that out, but the idle mixture and non-idle mixture are somewhat independent (assuming the Silverhawk injection system).

I am running a Bendix injection system, but I did check the mixture from near idle up to 1700 rpm, and it was holding pretty steady throughout the RPM range, so that tells me the idle and non-idle mixes are pretty close to right and I've got a gross over-rich condition from the control cable adjustment.

Originally Posted by Jesse

On the rpm, just change the setting for the EI side. The fact that it doubled means that the EI is putting out different pulses and it trumps the mag side in the Dynon.

I didn't know that - that's good data.

[swisseagle]

Hello

It is done! The first engine run on the plane was succesfull!

Have a look here: First engine run on HB-YMP

or a bit more info here in the video section: Link to Video-Photo thread

Now preparing for the next and last milestone

Thank you for all the information here in theis thread, great to have so many inputs and recommendations.

[LettersFromFlyoverCountry]

Sigh. Just looking at the picture makes me sad. Not because you're about to have a great day, but because it's another reminder that Mattituck is no more.

What a great resource Mahlon was.