Compression issues

[Wooddj18]

I have a 1992 mercury 200hp efi sn 0g111383. I bought the motor with a thrown rod in the number one cylinder. I had to replace the block crank case crank shaft and replaced all the pistons rings rods and bearings. Since I have put the motor back together I can’t seem to solve a compression issue I’m still having. My port side all three pistons are at 92psi and the starboard side all three pistons are at 65-70psi. I have replaced every seal on the power head when rebuilding it and then went back and put a gasket sealer on the head gaskets and exhaust plate. If anyone has any idea why this issue is still persisting it would be greatly appreciated. Thanks for the help.