Oil Residue in Exhaust, but not again!

[JimW]

Did it then didn’t do it . . . Out in the Gulf (of Mexico) a few weeks ago to watch the Blue Angels home coming, us and no less then a thousand others, jet skies to 80+ foot sport fisher’s and yachts. After the show most were WOT back to the pass, needless to say at 8kts we didn’t lead the pack. Tossed around a bit but all was well, arrived on the sound side to anchor up for a swim when I noticed oil film on the starboard transom apparently from exhaust. Went into the engine room to find oil splattered towards the back of the Volvo TAMD 41A, checked hoses, oil level, etc all were fine. Call my mechanic (he called back and said I should be OK for the 1.5 hour trip back to the marina. No visible issues, no more oil in exhaust or in ER, check temps with lazer temp gun (still don’t know how those work) all temps from each area of both engines were at or near the same.

Back this past weekend, mechanic came down ran the engines nothing noticeable, took her out for an hour or two, picked up the mechanic, he went below as we ran her harder, still nothing . . . Anyone experienced anything like this?

Standing by -
Jim

 

[Rogerh]

Jim, Were you running the generator while getting tossed around in the gulf? Does it go out the same exhaust tube? If so it might be something to consider...

 

[JimW]

Was running generator, however it has its own exhaust tube . . . Great thought . . . Just puzzling.

 

[DavidM]

So you had an oil film on the transom presumably from the exhaust, but more oil inside the engine room, right?


Oil in the engine room splattered around rather than a puddle from a leak can come from severe blowby from the crankcase breather. But you and your mechanic ran her hard later and didn't see anything.


Puzzling!


David

 

[JimW]

Yes, very much so . . . the mechanic check the can and no oil residue . . . Thanks for you reply.