Small Engines (Lawn Mowers, etc.): honda push mower, wrist pin, rmp

Question
i have a honda harmony hrb 215 push mower it is making  a knocking noise sounds like it is coming out in ovc area the compression is cood

Answer
A noise is a hard thing to diagnose on here, with out hearing it myself,  knocking type hollow noises are not very good. Could be the connection rod, even with good compression, could also be a wrist pin...Does the noise increase and decrease with the RMP?......Tom