Any 2-stroke gurus in here? Detroit 8v71 with misfire need help

Sounds to me a lot like an exhaust leak. I do like the idea @jamespmack had about checking cam lift.

 

I did listen to the video again and it does sound like an exhaust leak. The only thing that doesn't make sense is the cold temperatures of the exhaust on that cylinder.

If it has enough power and seems to run good going down the road, I'd pull both mufflers and see if it still sounds like it's missing.

 

If you’re speaking of this picture, that’s my 92 series in my General….

 

Yes that is the picture.

 

If you look at the airbox covers on the side of the block the 92 series are cast aluminium the 71 series are stamped steel and their larger. Post some pictures and I can tell you.

 

Valve covers will interchange between the 71 & 92. The 53 series is a different animal with hold down screws around the outside edge like a older Chevy or Ford….

 

He is asking for pictures of the block below the exhaust manifolds…. See the hand hole covers I have circled on the 6-71….

 

This is a 8V92 block…..