I was out today not for long and noticed I didnt have much power. Opened up the engine bay and pulled the dipstick and the oil looked to be a dark kakhi color. Where it showed some water in the oil but not a bunch. So that points you in a direction of a seal gone bad I know this. But, I also saw that there was water sitting on top of my 05 4.3 merc in a Mariah where the engine bay cover is the only way you get on and off the boat when you are in the water. I also saw that the oil filler tube was loose and saw the O ring. So this tells me that water got down in the oil through the filler tube.
This is what I was going to do to remedy the situation and want to know if I was on the right track. I am going to drain the oil tomorrow completely. Go in with half engine oil half diesel fuel. Start the boat and run it for 5-10 minutes. Drain that. Then put new oil and just oil this time in. Let the water run on the lower part of the motor just to make sure that I dont have water coming in from the jackets or anything else that I may not see at the moment. Check the oil and if it looks like oil and no water then I am going to take it out run it for a few hours. Bring it back home change the oil again and not worry about it.
I have since ordered a new oil filler tube with O ring just to make sure that I remedied that situation. I would like to know if there is any other advice I should do on that front and know that I am heading in the right direction. Any advice would be great.
This is what I was going to do to remedy the situation and want to know if I was on the right track. I am going to drain the oil tomorrow completely. Go in with half engine oil half diesel fuel. Start the boat and run it for 5-10 minutes. Drain that. Then put new oil and just oil this time in. Let the water run on the lower part of the motor just to make sure that I dont have water coming in from the jackets or anything else that I may not see at the moment. Check the oil and if it looks like oil and no water then I am going to take it out run it for a few hours. Bring it back home change the oil again and not worry about it.
I have since ordered a new oil filler tube with O ring just to make sure that I remedied that situation. I would like to know if there is any other advice I should do on that front and know that I am heading in the right direction. Any advice would be great.
