Why Add Fuel Stabilizer When Refueling
Adding fuel stabilizer to your boat’s engine fuel system every time you fill up the tank is a simple measure to protect the longevity of the engine.
Fuel stabilizer prevents boat fuel from absorbing water and prevents phase separation. Most of today’s gasolines contain about 10% ethanol, identified as E10 at the pump. Ethanol helps fuel burn more efficiently, which improves engine performance and reduces CO2 emissions. However, ethanol is hygroscopic and hydrophilic, which means it attracts and absorbs water molecules.
Eventually the ethanol reaches saturation point and the ethanol/water mixture separates from the gasoline. It sinks to the bottom of the fuel tank from where it’s drawn into the fuel system and creates major problems for the outboard and/or sterndrive.
Adding fuel stabilizer to your boat is just one part of properly winterizing a motor. Watch the video above to see how to winterize an outboard engine.