Been reading previous threads on this topic and leaning toward unburned oil, but wanted to give you guys more detail to help diagnose my problem. I went to an OK Lake on Aug 17 and tried my fishing luck. 4.5 hours later, one fish, and the water temp reaching mid 80's, I was done. I started up the 75hp Mariner and noticed some blue oil smoke coming from the head of the motor; at that point, it wasn't much. As I was heading toward the ramp, I decided to make one more pass on a point close by, but no luck. Started the beast again, and again more blue smoke was noticed. I ran it back to the ramp w/out any problems other than the smoke, got it loaded, and came home. Sat., 9-7, I noticed a very small amount of oil dripping from my propped-up motor. I checked it out, noticed it coming from the bottom of my lower unit. It appeared to be pretty clean oil; didn't look like the same color of oil that I put in the oil dispenser/compartment of the engine. Not sure if it's coming from the lower unit; unsure of the color of Gear oil used. Since I've bought this boat 2 years ago, I haven't changed out the lower unit gear oil. Plan on doing that now, plus changing out the seals of the drain/fill plugs. Could this be my solution to the leaking oil or could it be something else? Oh, forgot to mention, before my fishing trip on the 17th, I refilled my oil dispenser/compartment. Could I possibly have overfilled the dispenser? Since I'm new to this forum stuff, any advice would be appreciated.
