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This is recent info from the U.S. Boat Owners Assoc. relating to E-10 gas. ...bill in oregon
READY FOR WINTER
WHAT: Recommendations from the U.S. Boat Owners Association for winter storage of boats that have been fueled with ethanol-blended gasoline.
TOP IT OFF: For boats with built-in gas tanks, stop at the fuel dock and top off the tank before you haul out, leaving it nearly full with just a little room for expansion. A tank that is almost full limits the flow of air into and out of the vent, which reduces the chance of fluctuating temperatures adding condensation to the fuel. Condensation invites phase separation. Draining built-in fuel tanks of E-10 gas, while completely eliminating any chances of phase separation, is not practical and potentially dangerous.
FRESHENING: Marina owners who have dealt with E-10 gasoline for several years report that phase separation typically occurs when boats are stored with tanks only one-quarter to one-half full. They've learned that phase separation cannot be remedied by adding fresh gasoline in the spring. Once E-10 phase separates, the water will remain at the bottom of the tank.
ADDITIVES: With any fuel that sits in a tank for a long time, it's important to add a stabilizer, but stabilizers do not prevent phase separation. Once it occurs, additives and water separators can't help. The only remedy is to have the gas and ethanol/water professionally removed from the tank.
FIBERGLASS: Ethanol is known to chemically react with many fiberglass fuel tanks, which can cause them to deteriorate and potentially fail. Unfortunately, unless a boat's manufacturer can confirm that its fiberglass tank was built to withstand ethanol, an owner's only remedy may be to replace the tank with a nonreactive material such as aluminum.
BREATHING: While ethanol does attract moisture, never try to plug up a fuel tank vent to prevent moist air from entering a tank. Without room to expand, the additional pressure could rupture fuel system components.
OUTBOARDS: Any unmixed gas — that which does not contain 2-cycle engine oil — which remains in portable tanks may be carefully poured into an automobile gas tank. However, if you do have to store gas over the winter in a portable tank, keep the tank out of the sun and in a well-ventilated area away from ignition sources, keeping in mind that gasoline fumes are heavier than air. Recent tests of portable jerry jugs confirmed that over time, gasoline can evaporate through the walls of some plastic containers.
INFORMATION: Contact the U.S. Boat Owners Association at (800) 395-2628 or go to http://www.boatoregon.com/OSMB/news/...terizing.shtml.
READY FOR WINTER
WHAT: Recommendations from the U.S. Boat Owners Association for winter storage of boats that have been fueled with ethanol-blended gasoline.
TOP IT OFF: For boats with built-in gas tanks, stop at the fuel dock and top off the tank before you haul out, leaving it nearly full with just a little room for expansion. A tank that is almost full limits the flow of air into and out of the vent, which reduces the chance of fluctuating temperatures adding condensation to the fuel. Condensation invites phase separation. Draining built-in fuel tanks of E-10 gas, while completely eliminating any chances of phase separation, is not practical and potentially dangerous.
FRESHENING: Marina owners who have dealt with E-10 gasoline for several years report that phase separation typically occurs when boats are stored with tanks only one-quarter to one-half full. They've learned that phase separation cannot be remedied by adding fresh gasoline in the spring. Once E-10 phase separates, the water will remain at the bottom of the tank.
ADDITIVES: With any fuel that sits in a tank for a long time, it's important to add a stabilizer, but stabilizers do not prevent phase separation. Once it occurs, additives and water separators can't help. The only remedy is to have the gas and ethanol/water professionally removed from the tank.
FIBERGLASS: Ethanol is known to chemically react with many fiberglass fuel tanks, which can cause them to deteriorate and potentially fail. Unfortunately, unless a boat's manufacturer can confirm that its fiberglass tank was built to withstand ethanol, an owner's only remedy may be to replace the tank with a nonreactive material such as aluminum.
BREATHING: While ethanol does attract moisture, never try to plug up a fuel tank vent to prevent moist air from entering a tank. Without room to expand, the additional pressure could rupture fuel system components.
OUTBOARDS: Any unmixed gas — that which does not contain 2-cycle engine oil — which remains in portable tanks may be carefully poured into an automobile gas tank. However, if you do have to store gas over the winter in a portable tank, keep the tank out of the sun and in a well-ventilated area away from ignition sources, keeping in mind that gasoline fumes are heavier than air. Recent tests of portable jerry jugs confirmed that over time, gasoline can evaporate through the walls of some plastic containers.
INFORMATION: Contact the U.S. Boat Owners Association at (800) 395-2628 or go to http://www.boatoregon.com/OSMB/news/...terizing.shtml.
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