Boating Tips
How to Protect Your Yamaha Outboards from Ethanol
Last updated: February 24, 2026

If your version of fun and relaxation is boating, you must not miss it. Yamaha boats are among the highest quality leisure products and one of the best in the country due to its engine systems and design features.
Now let's think your adventure is spoiled by your Yamaha boat bobbing dead in the water while you try to trace and correct faults in a tank full of crappy gas. Ethanol is the center of all problems here. Found in most of the retail available fuel, ethanol is corrosive; it absorbs moisture and is a solvent.
Another important issue with Ethanol is that it can loosen debris in your fuel system and bring this debris from transmission lines, fuel tanks, and even the pump at the fuel dock.
The call-to-action here is not fueling your boat with an ethanol-blend gas. No, as there is no choice; rather you require an ethanol defense strategy.
Let's have an overview of the four-step solution to protect Yamaha outboards from ethanol.
### Step 1
Mount a ten-micron water-separating fuel filter for the respective engine. This will help water to safely move out from the fuel and get aggregated at the bottom of the filter. Go for Yamaha spin-on 10-micron filter. Yamaha says its filters provide a 95% filtration rate almost double to the 51% filtration rate required for the ten-micron rating.
### Step 2
Always prefer marine-specific fuel stabilizer and conditioner every time you fill fuel. This will prevent oxidation and phase separation. Yamaha's proprietary stabilizer formula comes with anti-corrosive components that protect exposed solder, copper and other metals from the offensive sodium sulfate present in ethanol.
### Step 3
Add an internal engine cleaner to safeguard your Yamaha outboards. Yamaha recommends Yamalube Ring Free Plus. It stops carbon buildup on the engine components and enhances performance, safeguards engine components from getting corroded, and cleans all the deposits off your fuel system and internal engine.
### Step 4
Purchase your fuel from a good place that sells a lot of fuel. Get the most potent and fresh gas possible. Buying gas from a high volume retailer helps you to be safe that you have purchased the freshest gas possible. Also, add an engine cleaner and stabilizer when you buy gas.
If you use your Yamaha boats less frequently, it would be wise to keep your fuel level of the tank at 7/8 full with properly stabilized and filled with fresh gas. Maintaining the level of your tank when the boat is not in use prevents condensation buildup in the tank.
Get ready for fun thrilling water experience with Yamaha boats. Check the extensive range of Yamaha boats at Premier Watersports at affordable rates. For decades now, we are the leading boat dealers in Tennessee, trusted for efficient quality services at best rates.
Do you have any queries about our available range of Yamaha outboards? Call us now at (865) 693-9949!
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