rust on top of cylinders 488 merc io

[richardk5457]

Originally Posted by spareparts

riser gasket, or the riser itself. replace both(use teh merc riser gasket) if you rebuild the engine. Check hte manifold as well. There is not an automotive head gasket available for that engine as its a mercruiser engine, never used in a car.

thank you for the info, mon. will take a hard look at riser and manifold, will probably buy new ones, for it is difficult to establish the inner wall condition of both parts unless you can advise on propper way to check both, would be glad to attempt this before ordering. again thank you for the time and suggestions. richard