1995 Force120 Picture help diagnose

[Nexus7]

Force 120 1995 engine has been running poorly at heavy load.
I pulled the head and I'm posting a picture of it.

Does not seem to have the correct amount of power.. at full load it's occasionally missing a cylinder.

I originally had 123, 150,150,150psi
I replaced the head gasket
Now i have 143,155,166,157psi

Still missing at hard power up.

Can anyone give me a diagnosis???
stuck rings possibly?
What's causing the extra carbon recycle exhaust past the rings possibly?
(I can't seem to upload a pic without getting some sort of administrator error). But heres the image

https://www.aomci.org/wp-content/uploads/2024/07/1.jpg

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[dingbat]

Does not seem to have the correct amount of power.. at full load it's occasionally missing a cylinder.

I originally had 123, 150,150,150psi
I replaced the head gasket
Now i have 143,155,166,157psi

Still missing at hard power up.

A miss is an electrical problem

Can anyone give me a diagnosis???
stuck rings possibly?

Electrical problem. Start with the cylinder in the top of your picture

What's causing the extra carbon recycle exhaust past the rings possibly?

A miss will not properly burn the fuel in the cylinder

 

[Jiggz]

When you removed the head did you inspect the cylinders for any scratches or gouging? The bottom 3 cylinders are too clean for a properly working 2 stroke engine like this one. Unless you already cleaned it prior to the pic. But the top one is too carbonated. How do the plugs look like? What is your setting for the fuel-air mixture screw? 1 full turn out from lightly seated at least? Can you identify which cylinder is missing by doing the cylinder drop test?