Thanks for the quick reply. We have a Yamaha dealer here in town, I'll check with them. It is the old evinrude that was milky, has been for years. That is one of the reasons I drain it every year before we leave NY for Fl. Put a new prop on it 2 years ago. Runs great for an older motor, love the electric start and tiller steer makes for a perfect match to my 16 ft alum boat.