Leaking Oil in Bilge (but from where)

[jzanthony]

Through the week i decided to tackle changing out the Bilge pump box for the rear A/C this was not that bad to accomplish.

After completing that task i went out for a brief run under 30 mins when I arrived back i quick look in the engine room to find a lot of dirty black oil.

Engines Merc 7.4L 340HP and BW velvet drive trannsmissions and I believe 1.52 to 1

So my First thoughts were what did i knock loose while i was down there thrashing around trying to get this box out and how can i pin point where this all came from.

First plan vacuum out all the oil/water and start wiping down everything so its dry, restart engines in neutral and see what happens, and nothing no leaking at all so I climb back down and start looking close up thinking maybe dipstick tube is knocked out of the pan, nope all good there but found a Crack in the port bell housing and its a a fair size possible 3.5 inches long and hair line thick.

Also I found out that that the Trans dipstick does actually tighten down mine were just pushed back in, Are these hydraulic Damper plates or would there be fluid in Bell housing.

So feeling frustrated I leave the boat and drive 1.5 hours home only to realize I never check the engine oil level, tranny oil level nothing which could have led me to a better direction in resolving the issue.

Any thoughts out side checking the fluid levels on everything and getting a quote from marina to fix bell housing, would love to have an idea of what I am talking about before having them over to look at the boat

Lots of details i should have before asking just wanted some info before i return to invesitgate

thanks Jamie

 

[jzanthony]

also should have stated the boat seem to be running fine and i was able to return with no issues as well docking went fine

thanks again Jamie

 

[dwna1a]

After getting everything is cleaned up lay down some oil pads down. That way you might be able to figure out where the oil is coming from. Also if you have a remote oil filter check the area around the lower connection. Sometimes the O ring goes and you find it leaking from that area.

 

[dvx216]

oil pressure sensor can spring a leak and you never think to check them

 

[endless seas]

Oil change system?

 

[jzanthony]

Thanks guys I will do another clean up and put down some white rags, I looked over the remote filters but will have another look.

I did not check the oil pressure sensor but will have a look when i get there, I dont have the oil change system but that would have been a nice option

oddly enough the liquid in the bilge was very black and the tranny fluid is red ? and the engine oil is fresh with maybe only 20 hours on it last check was still golden. Still unsure if the bell housing would have oil in there

Also wondering if it could possible be the trim tab reservoir not sure how much oil it holds

 

[dwna1a]

Trim tabs use ATF (red).

My remote failed and now my neighbors just failed him as well. Mine was a cracked lower housing and a bad hose. My neighbors hose has failed. I completely replaced mine, he is just doing his hoses