Re: Lower Unit Oil Leaks?
I am not intimately familiar with a Scott 40 but this applies to all two stroke outboards: You put oil in the gas. Every drop of that oil goes through the engine. Some gets burned (smoke) and the rest goes out the exhaust. As it drains down through the exhaust housing, it picks up carbon particles, which turns it black. Normally the whole mess goes out into the lake and you never see it. HOWEVER, if you have been running it out of the water or in a container, the mess becomes highly visable. When you shut it down there will be oil & water mixture coming out the various drain holes.
Those holes you are looking at-----drain holes.
If you are not getting water inside the lower unit, it is not leaking.
So check the gear oil and if no water, relax. And don't be tearing it apart if it doesn't need it.