Engine smoke and oil pressure

Egor

Member
Jul 22, 2023
45
Monterey Bay, California
Boat Info
SeaRay 340DA 1999
Engines
Twin mercs
Hello,

I have SedRay 340DA with twins Mercuisers 7.4 MPI 1999

Oil is about 1 year old. Oil levels are fine. Oil looks clean, not darkened, no particles. In both engines.
I also noticed that starboard engine consume more fuel than portboard engine, on RPM 3000 and above

Two quesitons:

1 when running above 3000RPM I obtain some amount of exhaust smoke. Is that normal? (I have a lot more pictures and videos if needed)
testRun.jpg

2 Oil pressure gauge readings on two engines are different: Port board stay still at 40PSI, while starboard is ~~30 PSI
gauge2.jpg


and yesterday after running at 4000RPM I noticed it drops to ~~25PSI.
gauge1.jpg

So the question is is that normal? what may cause it and where I should start and how to process with research?
 

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