Any suggestions for oil leak on a boat after replacing a cracked intake?

I have a 97 Mercruser 4.3 and when I winterize it I pull 4 plugs out of the side of the motor. I pour the antifreeze down a big hose in front of motor. I figured out that I missed some steps when winterizing it the first year and I cracked the intake. Replaced intake and there is still oil leaking underneath motor.Any suggestions for oil leak on a boat after replacing a cracked intake?
When you installed the new intake, did you use RTV sealant around the bolts? Where they torqued in the correct sequence? Did you throw away the end gaskets and use RTV sealant (that's how it's done)?


On your motor, you MUST remove the thermostat cover and fill with antifreeze, or remove the pipe plug from the bottom of the thermostat manifold.Any suggestions for oil leak on a boat after replacing a cracked intake?
Your question is a little unclear. Oil dripping down under the engine, could come from the block to intake gaskets or sealant used on ether end, instead of a rubber gasket. It's very unlikely that oil is leaking due to a winterization water caused crack. Check your oil filter. Sometimes you pull the old filter off, but the gasket sticks, so when you put the new one on there is already one there, resulting in an oil leak! Oil leaks in the pan area are not uncommon. Good luck!
oil does not flow thru your intake or exhaust manifold it is pumped up from the pan to the top of the head and it flows back to the pan. Nor does it flow thru the head like water does..Check the valve cover gasket, it would not come out from the bolt holes/studs that mounts the intake to the head..check timing cover, pan gasket..it is not normal for there to be oil around the pan area..that means you have a leak..my motors are tight and dont leak..Durning the off season pull your motor and replace all gaskets..coat ya a few bucks, but you will learn about your motor.
Possibly the Intake Bolts were not torqued in the proper sequence and now there is oil leaking from the tiny gap(s) between the intake/block/head