2000-2005 Yamaha F40B Outboard Service Manual, Page 102Get this manual
I_t_i_l1 POWER UNIT 5Add: Engine oil
Recommended engine oil stroke motor oil API: SE, SF, SG or SH SAE: 10W-30, 10W-40 or 20W-40 Oil quantity with oil filter 2,200 cm (74.4 US OZ, 77.4 Imp oz) without oil filter 2,000 cm (67.6 US OZ, 70.4 Imp oz)
6Install: Oil filter cap
7Check: Engine oil level Refer to "CHECKING THE ENGINE OIL LEVEL" on page 3-12
Recheck the engine oil level after running the engine for several minutesIf the engine oil is still not within the proper level, adddrain as needed