Hey guys, I'm new to boating and just bought a 13 foot gheenoe with a 4hp deluxe evinrude. I believe it is an 89 model. I just got back from a trip yesterday in salt water and flushed the engine with freshwater in a bucket. I had no problems with the engine when i was out on the water. This morning I noticed it was leaking oil from the lower unit. Can anyone tell me what is going on here and what I need to do? Thanks in advance, J.T.