What am I doing wrong?

[Boilerman66]

This is my 4th attempt at incubating muscovy eggs with the same results.
Hovabator forced air, auto Turner, temp 99.5 humidity 40 to 45, both vents open, last seen movement in egg was day 28, air sack in egg not piped, no power outages. That's about all the information I can think to give.i have no problem hatching chickens.

 

[OneToManyChickens]

There could be an issue with the egg tooth or ability to get out of the shell if the chicks are full grown.

 

[Kiki]

Is your thermometer calibrated?
Humidity gauge salt tested?

 

[Trux]

I have the same incubator, I used a meat thermometer with an external probe. Calibrated it in ice water, it happened to be pretty much right on. The ones that sit inside the bator are fine, but you cant calibrate them, so I wasn't going to trust it.

 

[Boilerman66]

Is your thermometer calibrated?
Humidity gauge salt tested?

Yes, both are calibrated. I am a stationary engineer by trade. I took it to work and tested it.

 

[Boilerman66]

I have the same incubator, I used a meat thermometer with an external probe. Calibrated it in ice water, it happened to be pretty much right on. The ones that sit inside the bator are fine, but you cant calibrate them, so I wasn't going to trust it.

mine is digital with a remote sensor.

 

[NaturalBeautyFarm]

Muscovy's need 35 days in incubator. https://incubatorwarehouse.com/how-long-to-hatch-an-egg
Humility raised to 65% after day 30?

 

[Boilerman66]

Muscovy's need 35 days in incubator. https://incubatorwarehouse.com/how-long-to-hatch-an-egg
Humility raised to 65% after day 30?

I know about the 35 day thing but on my next attempt I will try raising the humidity to 65% at day 30.