just got this boat from Maryland last week.
first time out, running awesome for 30 mins cruising around. came up to our spot and cut off the boat. about 20 mins later, tried to crank it and wouldnt start back. battery got weak pretty fast trying to start it. took the extra deep cycle outta a friends ski nautique and put in the boat . a few seconds after cranking off that battery and she fired right up. swapped back in my battery while it was running so it could recharge. rode around for 5 mins and came back and cut it off. about an hour later we road out and hammered it down. the motor wouldnt turn past 4000 when i hit it and i let off the throttle and it cut off. turned around to check out the motor and a lot of water was in the floor(im guessing it was from the boat stopping so fast when it cut off), after getting it pumped out with the bilges, i noticed something seeping out of the front corner of the valve cover. looked like a milkshake, oil and water mixing. .
there are two tubes that come off the valve covers that go to a catch can on the back of the motor with a breather. inside the catch can was about 10 ounces of clear water, no oil. tore off the valve covers and there was a lot of that really thick off white color milky film on the top inside of the valve covers. and water sitting in the top of the heads. tore off the intake and noticed that 6 of 8 intake valve guides were cracked. drained the oil and it was all milky also. all the spark plugs looked perfect so no water was going into the cylinders. pistons all look ok on the topside, faces of valves too. the copper headgaskets looked ok when i took the heads off. at this point i dont know how water got into the oil. havent messed with anything put 10 gallons of 112 in it and 6 gallons of 93 before i took it out. other than that all i did was check the oil. there was milky oil in the oil galley under the intake manifold and clean water sittin in the head under the rocker arms. so it looks as if water has gotten in from the topside somewhere but not sure how. any input here would be greatly appreciated. taking the heads to get checked out this week and valve guides replaced