Yamaha F100B F100C Outboards Factory Service Manual, Page 59Get this manual
Fuel systemPower unit
NOTE: To extract and change the oil through the dipstick hole a, you can use an oil changer like the one shown in the illustration3Place rag under the oil filter, and then remove the filter
S60C3090
S60C3100
Oil filter wrench: 90890-01426
S60C3080
Oil filter wrench: 90890-01426