Honda BF115A, BF130A Outboard Motors Shop Manual., Page 61Get this manual
HONDA B 15A-130A
5) Refill with the recommended engine oil to the upper limit mark on the dipstick
Engine oil capacity
5.6 (5.9 US qt, 4.9 Imp qt) With oil filter replacement: 6.5 (6.9 US qt, 5.7 Imp qt) SAE 10W30 API Service classification SGISH
Recommended engine oil
Using nondetergent oil can shorten the engine's service life, and using 2-stroke oil can damage the engine6) Reinstall the oil filler cap and dipstick