Engine smoke

walkermar

Has anyone experienced very light white smoke t high revs/28knots. No issues with performance or temperature but not seen it before. Water temp is 9deg and ain’t temp is 6deg so was thinking possible condensation?

GMSLITHO

Vapor trails 

Handymans342

Or fuel

raybo3

Handymans342 said:

Or fuel

I thought fuel burn was blue??? Oil black??

aero3113

Rich mixture is usually black. I would think what @walkermar is seeing is just condensation from the hot exhaust hitting the cold water.

GMSLITHO

yep vapor trail I had it a lot from my old 318 

skennelly

My vote is condensation.  That's some cold running conditions.  Curious as to what you are doing?  Doesn't seem fun.

walkermar

I was just taking her out around our local waters to give her a run out. I use her all year around and only take her out of the water for maintenance. The only difference this year is I have put a diesel additive in the tank to stop diesel bug. Today was cold but I have never see it before. Looked like steam/ and only was present at higher revs/ speed. 

walkermar

If I new how to upload a video then I could share the steam/smoke in question if anyone could help ? Many thanks to all responses as always from you guys

Dutch320

In a car or truck white smoke is almost always  antifreeze, usually a bad head gasket leaking into cylinders. Hopefully not the case, but if you have a closed cooling system might be something to look at. 

212rowboat

Blow by most likely seeing its at high revs exclusively.  

If gas check your pcv grommet seating.  
If diesel check your ccv... theyre the same thing just called different names.  

With the big delta of temps from internal to external on that engine, it's a recipe for escaping blow by. 

walkermar

Cheers Rowboat can you confirm what ccv is ?

aero3113

@walkermarI’m going to guess crank case vent.