Hi All, I have just purchased a 1992 Mercury 25 HP, that I have taken out for a run about 4 times and is running well. However after a washdown and flush I have noticed a small amount of oil leaks from just under where the prop is bolted on - it leaks for the next day or so. The leaking oil seems very similar to the 2 stroke oil I am using. Is the leak just unburnt 2 stroke oil, or is there possibly a gearbox or gearbox oil leak problem ? Thanks - any help appreciated.