Hi guys and gals,<br />I have a 1986 Bayliner Contessa, that I usually run around 3500 RPMs. The recommended manufacturer use is around 5 or 6000. The engine has good compressions on all 8 cyl, and no other problems that I know of. <br /><br />What would you recommend for such an old engine, as far as RPM is concerned? Is it bad for the engine to run it at less than what the manufacturer recommended, or does it increase the life of the engine?<br />Thank you much.