No, no and Yes. If it is good quality outboard motor oil. I am surprised no one jumped on this. JB's ***************** must be down.Originally posted by mrgixser:<br /> hello! i am new to boating and i have a 1979 115 hp evinrude. i was wondering if anyone could explain how to change the lower unit grease,and how much does it hold? and also is the fuel-oil mixture supposed to be 50:1 ratio? thanx