Gentleman, I have a 3.0 merc 1987 model motor I ran on muffs for 30 minutes and it got about a gallon of water in the oil. i have had the manifold and elbow off they looked fine I also had the head and head gasket off and replaced the head gasket. I also repaced the manifold gaskets when i...
I HAVE A 1987 3.0L MERCRUSIER MOTOR AFTER THE WINTER I STATED THE MOTOR AND LET IT RUN WITH THE WATER HOSE ie EAR MUFFS.I CHECKED OIL IT WAS NOT MILKY. I WENT TO THE LAKE AND IT GOT HOT REAL QUICK IN LIKE TWO MINUTES. I BROUGHT IT HOME AND IT HAD ONE GALLON OF WATER IN THE OIL PAN WHEN I DRAINED...