Outboard Motor Fuel Mix Calculator
Quick Answer
Modern 2-stroke outboards typically use 50:1 ratio. Older models (pre-2000) often use 50:1, 40:1, or 32:1 depending on manufacturer. Always check your manual.
Outboard Motor Calculator
Custom Ratio:
:1
Oil Needed
You Need
2.6
fl oz
for 1 gallon at 50:1 ratio
Milliliters
77
US Fluid Ounces
2.6
Liters
0.077
Outboard Motor Equipment Types
- Small Outboards (2.5-15 HP)
- Mid-Size Outboards (20-60 HP)
- Larger Outboards (75-150 HP)
- Portable Outboards
- Fishing Motor Outboards
Recommended Oil for Outboard Motor
TCW-3 certified marine 2-stroke oil (Yamaha Yamalube, Mercury Premium Plus, Quicksilver, etc.). Marine oils are designed for water-cooled engines and prevent ring sticking.
Always Check Your Owner's Manual
Using the wrong fuel ratio can damage your engine. Some older outboards have oil injection systems and don't require premix. Check if your outboard has an oil reservoir before mixing fuel.