baja24outlaw

Have a big Outerlimits 47 here at our shop, boat has three engine set up, center engine starts and runs fine, however we have oil coming through the exhaust water jackets, especially after the engine is shut off. Does not build up water mix in the oil pan, instead it is emptying the oil pan and the oil is mixing with the oil and exiting through the exhaust water jackets! Both oil coolers have been replaced, thinking this may be the problem. These are Merlin Blocks first generation not Merlin III seies, any ideas? Thanks.

tbanzer

Sounds like oil galley is cracked to the water jacket

baja24outlaw

This exact same thing was told me by another engine builder, would this cause the oil to be drained this way and not re enter the oil pan? I have no water entering back into the oil pan that I can tell, just seems to drain it, not make it.

Rookie

iTrader: (4)

Differential pressures. You have greater pressure in the oil system only allowing oil to leave the system but not allow water to enter the oil system. Kind of a one way valve.

Mbam

I would double check the oil coolers, can't hurt

baja24outlaw

Oil coolers are brand new and were tsted before installation, thats not the problem. Eddie Young owner and Operator of Youngs Performance Marine, told me what it is, seems allot of these older Merlin blocks experienced and issue like this.

Thanks

Rookie

iTrader: (4)

So you do not want to share the solution of the problem with the rest of the forum in case this issue is searched at a later date?

offshorexcursion

iTrader: (5)

Good idea on re checking the oil coolers. I had new ones (on the cruiser) go bad within a few weeks. Was scratching my head wondering. Sure enough it was the new oil cooler.

Rookie

iTrader: (4)

Lol, from everything I have read about Eddie he seems to be a class act. I'm sure he told him what his problem is and the answers to future problems. I just don't want Baja24outlaw forgetting to update the post when he does solve the problem. I use the search feature and I would say that half of the issues that are solved are never updated on threads.

baja24outlaw

I appologize guy's seriously, everything points to being internally. Coolers are fine, oil is only visable leaving the exhaust dumps after the engine has been shut down, not while running due to the greater pressure of the oil. I trust Eddie any day, he is great at what he does and that is build damn fine engines. I have been doing this a long time myslf, but when it comes to something that stumps me, I always go to Eddie for advice.