Welcome to our quick guide on maintaining the right oil levels in your Yamaha outboard.
The right amount of oil is crucial for maintaining your outboard engine:
- Insufficient oil leads to increased friction, overheating, and potential engine failure.
- Overfilling, on the other hand, can cause oil foaming, spark plug fouling, and more.
We’ll give you a simple chart that tells you exactly how much engine oil and lower unit oil your Yamaha outboard requires. Whether you’re a seasoned boater or a new Yamaha owner, this info will help you keep your outboard running smoothly.
Let’s get started!
Liters to US Quart Conversion
The measurements in our chart are in liters, but we’ve also included a convenient converter to help you find the US quarts equivalent:
liters
Yamaha Outboard Oil Capacity Chart (All Models)
| Model | Engine Oil | Lower Unit |
|---|---|---|
| F2.5 | 0.35L | 0.07L |
| F4 | 0.6L | 0.1L |
| F6 | 0.6L | 0.12L |
| F8 | 0.8L | 0.15L |
| F9.9 | 0.8L | 0.15L |
| F9.9 (High Thrust) | 0.8L | 0.38L |
| F15 | 1.8L | 0.25L |
| F20 | 1.1L | 0.25L |
| F25 | 1.1L | 0.33L |
| F25 (High Thrust) | 1.1L | 0.44L |
| F30 | 1.7L | 0.44L |
| F40 | 1.7L | 0.44L |
| F40 (Jet) | 1.7L | 0L |
| F50 | 2.1L | 0.44L |
| F50 (High Thrust) | 2.1L | 0.67L |
| F60 | 2.1L | 0.44L |
| F60 (High Thrust) | 2.1L | 0.67L |
| F60 (Jet) | 2.1L | 0L |
| F70 | 2.1L | 0.67L |
| F75 | 3.2L | 0.67L |
| F90 | 3.2L | 0.67L |
| VF90 | 3.2L | 0.67L |
| F90 (Jet) | 3.2L | 0L |
| F115 | 3.2L | 0.74L |
| VF115 | 3.2L | 0.74L |
| F115 (Jet) | 3.2L | 0L |
| F150 (i4) | 4.5L | 0.98L |
| VF150 | 4.5L | 0.98L |
| F150 (Jet) | 4.5L | 0L |
| VF175 | 4.5L | 0.98L |
| F200 (i4) | 4.5L | 0.98L |
| F200 | 4.7L | 1.15L |
| VF200 | 6.7L | 1.06L |
| F225 (4.2L) | 6.3L | 0.92L |
| VF225 | 6.7L | 1.06L |
| F250 (4.2L) | 6.3L | 0.92L |
| VF250 | 6.7L | 1.06L |
| F300 (4.2L) | 6.3L | 1.51L |
| F350C | 6.5L | 1.51L |
| XF425 | 7.8L | 1.51L |
| XF450 | 7.8L | 1.51L |
Yamaha 2.5 – 25 HP Outboard Models
Yamaha 2.5 HP Outboard Oil Capacity
The Yamaha F2.5 has an engine oil capacity of 0.35 liters (0.37 US quarts) and a lower unit oil capacity of 0.07 liters (0.08 US quarts).
Yamaha 4 HP Outboard Oil Capacity
The Yamaha F4 has an engine oil capacity of 0.6 liters (0.63 US quarts) and a lower unit oil capacity of 0.1 liters (0.11 US quarts).
Yamaha 6 HP Outboard Oil Capacity
The Yamaha F6 has an engine oil capacity of 0.6 liters, which is equivalent to 0.63 US quarts, and a lower unit oil capacity of 0.12 liters, or 0.13 US quarts.
Yamaha 8 HP Outboard Oil Capacity
The Yamaha F8 has an engine oil capacity of 0.8 liters, which is equivalent to 0.85 US quarts, and a lower unit oil capacity of 0.15 liters, or 0.16 US quarts.
Yamaha 9.9 HP Outboard Oil Capacity
The standard Yamaha F9.9 has an engine oil capacity of 0.8 liters (0.85 US quarts) and a lower unit oil capacity of 0.15 liters (0.16 US quarts).
The Yamaha F9.9 (High Thrust) engine oil capacity is 0.8 liters (0.85 US quarts) and the lower unit oil capacity is 0.38 liters (0.4 US quarts).
Yamaha 15 HP Outboard Oil Capacity
The Yamaha F15 has an engine oil capacity of 1.8 liters (1.9 US quarts) and a lower unit oil capacity of 0.25 liters (0.27 US quarts).
Yamaha 20 HP Outboard Oil Capacity
The Yamaha F20 has an engine oil capacity of 1.1 liters, equivalent to 1.16 US quarts, and a lower unit oil capacity of 0.25 liters, or 0.27 US quarts.
Yamaha 25 HP Outboard Oil Capacity
The Yamaha F25 has an engine oil capacity of 1.1 liters, equivalent to 1.16 US quarts, and a lower unit oil capacity of 0.33 liters, or 0.34 US quarts.
The Yamaha F25 (High Thrust) has an engine oil capacity of 1.1 liters, which is equivalent to 1.16 US quarts, and a lower unit oil capacity of 0.44 liters, or 0.47 US quarts.
Yamaha 30 – 115 HP Outboard Models
- Original Yamaha OEM Yamalube Complete Fitment in Description
- Kit includes: 3 YamaLube Quarts Yamaha Part #LUB-10W30-FC-12-00
- Kit Includes: Yamaha Oil Filter Part #5GH-13440-80-00
- Kit Includes: 1 Gasket Part #94030-14M09-00
Yamaha 30 HP Outboard Oil Capacity
The Yamaha F30 has an engine oil capacity of 1.7 liters (1.8 US quarts) and a lower unit oil capacity of 0.44 liters (0.47 US quarts).
Yamaha 40 HP Outboard Oil Capacity
The Yamaha F40 has an engine oil capacity of 1.7 liters (1.8 US quarts) and a lower unit oil capacity of 0.44 liters (0.47 US quarts).
The Yamaha F40 (Jet) has an engine oil capacity of 1.7 liters (1.8 US quarts) and no lower unit oil capacity (0 US quarts).
Yamaha 50 HP Outboard Oil Capacity
The Yamaha F50 has an engine oil capacity of 2.1 liters (2.22 US quarts) and a lower unit oil capacity of 0.44 liters (0.47 US quarts).
The Yamaha F50 (High Thrust) has an engine oil capacity of 2.1 liters (2.22 US quarts) and a lower unit oil capacity of 0.67 liters (0.71 US quarts).
Yamaha 60 HP Outboard Oil Capacity
The Yamaha F60 has an engine oil capacity of 2.1 liters (2.22 US quarts) and a lower unit oil capacity of 0.44 liters (0.47 US quarts).
The Yamaha F60 (High Thrust) has an engine oil capacity of 2.1 liters, equivalent to 2.22 US quarts, and a lower unit oil capacity of 0.67 liters, equivalent to 0.71 US quarts.
The Yamaha F60 (Jet) has an engine oil capacity of 2.1 liters (2.22 US quarts) and no lower unit oil capacity.
Yamaha 70 HP Outboard Oil Capacity
The Yamaha F70 has an engine oil capacity of 2.1 liters (2.22 US quarts) and a lower unit oil capacity of 0.67 liters (0.71 US quarts).
Yamaha 75 HP Outboard Oil Capacity
The Yamaha F75 has an engine oil capacity of 3.2 liters (3.38 US quarts) and a lower unit oil capacity of 0.67 liters (0.71 US quarts).
Yamaha 90 HP Outboard Oil Capacity
The Yamaha F90 has an engine oil capacity of 3.2 liters (3.38 US quarts) and a lower unit oil capacity of 0.67 liters (0.71 US quarts).
The Yamaha VF90 has an engine oil capacity of 3.2 liters (3.38 US quarts) and a lower unit oil capacity of 0.67 liters (0.71 US quarts).
The Yamaha F90 (Jet) has an engine oil capacity of 3.2 liters (3.38 US quarts) and no lower unit oil capacity.
Yamaha 115 HP Outboard Oil Capacity
- Original Yamaha OEM Yamalube Complete Fitment in Description
- Kit includes: 4 YamaLube Quarts Yamaha Part #LUB-10W30-FC-12
- Kit Includes: Yamaha Oil Filter Part #5GH-13440-71-00 Interchangeable with Part #5GH-13440-80-00
- Kit Includes: 1 Gasket- Part #90403-14M09-00
The Yamaha F115 has an engine oil capacity of 3.2 liters (3.38 US quarts) and a lower unit oil capacity of 0.74 liters (0.78 US quarts).
The Yamaha VF115 has an engine oil capacity of 3.2 liters (3.38 US quarts) and a lower unit oil capacity of 0.74 liters (0.78 US quarts).
The Yamaha F115 (Jet) has an engine oil capacity of 3.2 liters (3.38 US quarts) and no lower unit oil capacity.
Yamaha 150 – 450 HP Outboard Models
Yamaha 150 HP Outboard Oil Capacity
- Original Yamaha OEM Yamalube Complete Fitment in Description
- Kit includes: 6 YamaLube Quarts Yamaha Part #LUB-10W30-FC-12-00
- Kit Includes: Yamaha Oil Filter Part #69J-13440-04-01
- Kit Inclues: Gasket Part #90430-14M09-00
The Yamaha F150 (i4) has an engine oil capacity of 4.5 liters (4.76 US quarts) and a lower unit oil capacity of 0.98 liters (1.03 US quarts).
The Yamaha VF150 has an engine oil capacity of 4.5 liters (4.76 US quarts) and a lower unit oil capacity of 0.98 liters (1.03 US quarts).
The Yamaha F150 Jet has an engine oil capacity of 4.5 liters (4.76 US quarts) and no lower unit oil capacity.
Yamaha 175 HP Outboard Oil Capacity
The Yamaha VF175 has an engine oil capacity of 4.5 liters (4.76 US quarts) and a lower unit oil capacity of 0.98 liters (1.03 US quarts).
Yamaha 200 HP Outboard Oil Capacity
- Original Yamaha OEM Yamalube Complete Fitment in Description
- Kit includes: 6 YamaLube Quarts Yamaha Part #LUB-10W30-FC-12-00
- Kit Includes: Yamaha Oil Filter Part #69J-13440-04-01
- Kit Inclues: Gasket Part #90430-14M09-00
The Yamaha F200 (i4) has an engine oil capacity of 4.5 liters (4.76 US quarts) and a lower unit oil capacity of 0.98 liters (1.03 US quarts).
The Yamaha F200 has an engine oil capacity of 4.7 liters (4.97 US quarts) and a lower unit oil capacity of 1.15 liters (1.22 US quarts).
The Yamaha VF200 has an engine oil capacity of 6.7 liters (7.08 US quarts) and a lower unit oil capacity of 1.06 liters (1.13 US quarts).
Yamaha 225 HP Outboard Oil Capacity
The Yamaha F225 (4.2L) has an engine oil capacity of 6.3 liters (6.66 US quarts) and a lower unit oil capacity of 0.92 liters (0.97 US quarts).
The Yamaha VF225 has an engine oil capacity of 6.7 liters (7.08 US quarts) and a lower unit oil capacity of 1.06 liters (1.13 US quarts).
Yamaha 250 HP Outboard Oil Capacity
The Yamaha F250 (4.2L) has an engine oil capacity of 6.3 liters (6.66 US quarts) and a lower unit oil capacity of 0.92 liters (0.97 US quarts).
The Yamaha VF250 has an engine oil capacity of 6.7 liters (7.08 US quarts) and a lower unit oil capacity of 1.06 liters (1.13 US quarts).
Yamaha 300 HP Outboard Oil Capacity
The Yamaha F300 (4.2L) has an engine oil capacity of 6.3 liters (6.66 US quarts) and a lower unit oil capacity of 1.51 liters (1.59 US quarts).
Yamaha 350 HP Outboard Oil Capacity
The Yamaha F350C has an engine oil capacity of 6.5 liters (6.87 US quarts) and a lower unit oil capacity of 1.51 liters (1.59 US quarts).
Yamaha 425 HP Outboard Oil Capacity
The Yamaha XF425 has an engine oil capacity of 7.8 liters (8.24 US quarts) and a lower unit oil capacity of 1.51 liters (1.59 US quarts).
Yamaha 450 HP Outboard Oil Capacity
The Yamaha XF450 has an engine oil capacity of 7.8 liters (8.24 US quarts) and a lower unit oil capacity of 1.51 liters (1.59 US quarts).
Why is the Right Amount of Oil Important?
The proper amount of oil ensures that all the engine’s moving parts are adequately lubricated, reducing the friction that causes wear and tear. Over time, insufficient lubrication can result in serious damage to the engine, leading to costly repairs or even replacement.
Much like the engine, the lower unit requires a specific amount of oil to operate smoothly. Not having enough oil can lead to overheating, improper gear operation, and eventual failure of the unit.
Insufficient Outboard Engine Oil
Insufficient engine oil can be very damaging to an outboard engine. Here are the primary reasons why not having enough engine oil is bad for your outboard:
- Inadequate Lubrication: The main function of engine oil is to lubricate the engine’s moving parts. When there isn’t enough oil, the parts will start to grind against each other, causing friction, overheating, and increased wear and tear. This can lead to severe damage, including scoring of the cylinder walls and piston seizing.
- Overheating: Insufficient oil leads to increased friction which can cause your engine to overheat. Overheating can cause severe damage to the engine components, including warping or melting, and can lead to engine failure.
- Corrosion and Sludge Formation: Engine oil also plays a crucial role in cleaning the engine by suspending dirt particles and carrying them to the oil filter. Without enough oil, the engine will accumulate more dirt, sludge, and other harmful substances, which can lead to corrosion and blockages.
- Poor Performance: Without enough oil to lubricate and cool its parts, your engine might not deliver its optimal performance. It could run roughly, lose power, or have poor fuel efficiency. In severe cases, the engine could seize or fail entirely.
- Engine Failure: In the worst-case scenario, running an engine without enough oil can cause total engine failure. This can be a result of parts grinding together due to lack of lubrication, overheating, or a buildup of dirt and sludge.
Overfilling an Outboard Engine with Oil
Overfilling can also cause a variety of problems:
- Oil Foaming: When there’s too much oil in the system, the crankshaft can whip the oil into a froth, causing it to become foamy. This froth makes it harder for the oil pump to circulate the oil, leading to decreased lubrication. Air bubbles in foamy oil do not lubricate as effectively as pure oil, which can lead to increased wear and tear on the engine’s components.
- Increased Pressure: Overfilling the oil can cause an increase in pressure when the pistons move down in the crankcase. This can force the excess oil into parts of the engine where it doesn’t belong, such as the combustion chamber, which can lead to oil burning and potentially harmful deposits.
- Spark Plug Fouling: If the excess oil makes its way into the combustion chamber, it can foul the spark plugs, creating a weak or no spark situation which can negatively affect the engine’s performance, or in some cases, prevent the engine from starting at all.
- Oil Leaks: Too much oil can also increase the pressure within the engine, which can lead to oil leaks. This occurs when the oil seeps out through various gaskets and seals.
- Poor Fuel Economy: Excess oil in the combustion chamber can lower the octane rating of the fuel and cause the engine to run inefficiently. This can result in decreased fuel economy and performance.
Conclusion
Using our oil capacity chart as a guide, you can ensure the correct amount of oil is added during each change. It helps to prevent overfilling or underfilling, both of which can result in diminished performance and potential damage.
These capacities are specified by Yamaha, a company with years of experience and expertise in outboard engine manufacturing. They’ve done the research and testing to determine what these engines require for optimal performance.
Always refer to the manufacturer’s guidelines when performing oil changes to ensure your engine receives the care it needs.
