2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 295Get this manual
3UPPER CASE 1) TWO-PIECE UPPER CASE
Two-piece upper case has been used to increase the oil sump capacity and to obtain better servicingThe upper-case functions as the oil pan, which obtained 0.6-liter oil sump increase compared with previous F15 (66M)Oil sump capacity comparison New F15 (6AG), F20 (6AH) 1.6 1.7 US qt Previous F15 (66M) 1.0 1.1 US qt Previous F20 (65P) 1.7 1.8 US qt 1.4 Imp qt 0.9 Imp qt 1.5 Imp qt
Exhaust gas flow at idling
Upper case Upper case 2
Cooling-water wall