Phil, what caused that scratch? To answer your question as long as it isnt a high spot you can run it, may not be ideal but it will run. You see very slight difference in compression on used irons unless they are just extremely worn. I dont remember the clearances on the renesis but they have a much larger clearance from the factory than the 13b. Landers has a good bit of experience with these engines and I am sure he can chime in.
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