Low compression 0/B

[jwclbi]

Hello, Recently compression tested my 1998 225EFI Merc and discovered after 800 hours the compression is down to low to mid 90's on all cylinders. The engine still runs fine but was talking to a couple guys who suggested putting new rings in it. Anyone have any information on this and if it works? I know its big job and was thinking if its worth doing on an older engine. Thanks