Hello, I just bought a 1989 20 horse Johnson (TE20CRLCEM). I am going through it now, I rebuilt carb and fuel pump already, Next is lower unit reseal and water pump, My question is about compression. I am reading 70 psi in the #1 cylinder and 72 in #2. I can't find any information as to what is the acceptable range before you need to think about new rings. Right now it starts in one or two pulls, I'm just trying to figure out if the engine is getting tired or if I have a few years in it. Thanks,