Oversized omc parts

[merald]

I have a question. If an engine have oversized pistons, .030 in it, does that tell that the engine had been repaired before from an breakdown? Does all engines have standard from start? Thanks

[Michael j]

All new motors are standard bore.
Any motor with oversized pistons has
Been bored out & rebuilt.

[merald]

Thanks! Just to be 100% sure (a newbie around engine total renovation) if it says .030 on top of the piston, it have to mean that I should buy the .030 OS ring set OMC 0385799?

[Michael j]

Yes .030 piston needs .030 rings. See if you can read the numbers stamped in the top of the piston. Make sure it is a OMC piston. If it is a after market piston the OMC rings may not fit?