I had a tie bar lifter failure on one engine at 370 hours so I had to freshen that engine because of the metal in the motor. Then I replaced springs and lifters and cam in the other engine, changing to a style of lifters that did not use a tie bar. Currently I have one engine with 700 hrs on that engine without doing anything else to it. Running 30 weight I have good oil pressure using 1 qt every 20-25 hours.

Thanks for the heads up!

I would do leak down first to determine where the leakage is. Most likely top ends.

Assuming the bottom end is good, I would do full top ends and change the cam and lifters.
Bob M (rmbuilder) or Eddie Young can hook you up with all the needed parts.

Called Bob yesterday, thanks for all of the help!

if they are factory sealed motors you are probably better off not having someone rebuild the bottom end anyway. Theres a reason mercruiser engines cost what they do, they keep really nice tolerances and the correct ones for marine use.

Not saying that having an engine rebuilt is always a bad idea... just that there is always a chance of human error during assembly and measurement