my buddy has a puddle of oil that has leaked out of the inside of the prop.does this sound like a seal and is it hard to replace the seal?

what color is the fluid

he said it was dark green

How thick is the oil does it feel thick like gear lube or thin like tcw3

If it is a Mercury then it could be gear lube. It needs to be checked out. It could be Premium Plus oil.

I had that problem and took the prop off and there was some fishing line raped around it Took it off and stoped the leak Maybe it not to late and your seal is ok. H.L.

Tommy has my boat at his shop right now for the same issue. Mine was a lower unit leak.

Not unusual to see unburnt engine oil drip down the exhaust through the prop hub, dark blueish black might appear kind of greenish. Most gear oils are amber but after a year of running in the gearbox can end up looking dark green.

I'd check the gear oil for water.

Mercury High Performance Gear Lube is blue.

update us on what it ends of being from cause i got puddle of green like u leakin out the two smal holes at the nose ofmy lower unit opposite end of the prop

he is going to take to shop later this week