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The recently overhauled carb was running too rich. Sent it back to Marvel and they reworked it under warranty and leaned it out.

No, I am not familiar with AYA or Grumman Gang, but it appears I need to be. Does AYA stand for something? Thanks...to both of you thus far for responding

Yes, checked camshaft timing. He also checked the opening distance of the valves to be sure the lobes were properly opening the valves.

We have an AG5B with a O-360-A4K which is pretty typical for the Tiger. Our Tiger has a newly overhauled engine, new prop, overhauled carb, new mags, new plugs all with less than 50 hrs. New prop at 63 degrees which is mid range between cruise and climb props. We just cannot get the...