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Exactly what I was thinking, I also remember my 172 days, and compared to what I fly now.... You have to pull a lot on that thing even when properly trimmed... I've also never seen a 172 do a "high speed climb" HAHAHAHAHA

Yes perhaps.... this is getting higher on my list of (that might be it) I am going to pull them and check condition etc.... at last annual I had a lot of lead buildup as all of that time was my training and I did not lean as much as I should have, but I have been much more diligent about leaning...

I didn't mention what I was leaned to in original post that was a commenter, but my GPH for a 7500 is about 6.8, in the 0320. I do wonder about a plug issue and and I will try that mag check next time I see it.... Also very big and forgot to mention in original post but one other...

checked this early on and do not think its carb icing. carb heat works as you'd expect.

Was also told this once too, and have ruled this out as well. I have experienced carb ice before and recognize how it shows up. Carb heat has normal operation during this if I use it etc.

I was told to check this early by my CFI, he said he had never seen an issue with me failing to address this before so he doubted it, but said slow drop like that could be recession of the throttle. I did check and pay more attention and the throttle is not moving.

Alright time for stump the chumps! First of all I am brand new here (and also to aviation) so thank you all for your time and energy, and ideas. I have a 79' Grumman AA5A Cheetah with an 0320-E2G my issue is as follows. I have noticed lately a slow drop in RPM's during cruise flight. I am up...