News Home Video Gallery Newsletters Photo Gallery Cruising Int
Sail-World.com : Storing a boat for the winter? Get the scoop on E-10 gas
Storing a boat for the winter? Get the scoop on E-10 gas

'Some boaters may still be confused about how to store gas with ethanol in their boat’s gas tank over the winter lay-up period. To avoid any problems, BoatUS says the tank should be filled to near its capacity.'    BoatUS ©    Click Here to view large photo

Almost a full tank or nearly empty tank? That is the big question that boaters are now posed with in the midst of preparing their boats for the long winter hibernation. The concern is ethanol - an octane enhancing gasoline additive that has some unfortunate, harmful side effects on marine engines.

Boat Owners Association of The United States (BoatUS) has some tips learned from fuel industry insiders on how to store a boat with E-10 gasoline (containing 10% ethanol) over the winter.

- The octane issue: Some boaters choose to leave their boat's gas tank mostly empty over the winter, and then refill in the spring in the hopes of 'refreshing' the fuel to regain any octane loss. However, a nearly empty gas tank introduces a bigger problem: the strong possibility of phase separation with the E-10 gas. Incidentally, over long winter storage periods, E-10 gasoline loses octane at about the same rate as non-ethanol gasoline.

- The path to phase separation: Ethanol (an alcohol) can attract and absorb water - about 10 times more than regular gasoline - and still burn harmlessly through the engine. However, there comes a tipping point when the ethanol can no longer absorb the water, and the alcohol will separate out or 'phase separate' from the gasoline. When this happens, the solution of water soaked ethanol will settle to the bottom of the tank, which is where the engine's fuel system pick-up is located. Can you see where we are headed with this?

- More water, less absorption: The problem with leaving a tank mostly empty is that it increases the tank's 'lung capacity' to breath in moist air (water) through the tank's vent. If the tank is mostly empty over the winter, there will also be less E-10 gas in the tank to absorb the moisture. This combination of more water and less capacity for absorption greatly increases the chances of phase separation. Adding fresh gasoline in the spring would not remedy the problem - the phase-separated ethanol remains separated at the bottom of the tank.

- The Water Separator issue: E-10 can hold up to 1/2 percent of water by volume and up to that concentration the water molecules will dissolve in the gasoline forming a soluble mixture that will pass through a water separator and burn harmlessly in your engine. The only time water will collect in a tank and not be absorbed is if phase separation has occurred, and by then it will be too late. A water separator is not a solution to the phase separation problem.

- The Fuel Additive issue: Fuel additives are good for many reasons and should be used when laying up a boat for winter, but no additive will stand up to a good-sized slug of water. And once too much water has entered the tank and the gas has begun to phase separate, no additive will return the fuel to its original state. The only solution to phase-separated gas is to have a professional drain the tank and start anew.


The best advice for storing E-10 in your boat's gas tank over winter: Keep the tank nearly full. This greatly reduces the volume of moist air that can enter the tank via the fuel tank vent when temperatures fluctuate in the fall and spring. With any fuel, an antioxidant (found in many additives) will help keep it fresh during lay-up. Finally, never plug up a fuel tank vent - it creates pressure that could cause dangerous leaks in the fuel system.

For more information, click here. A free, downloadable winterizing checklist is available here.

BoatUS website


by D. Scott Croft

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=103129

4:12 PM Tue 23 Oct 2012GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.







Cruising USA

Predictwind helps you pick the best time to depart by Richard Gladwell Sail-World.com/nz,
















4.8 million Legos all at sea by Adam Clark Estes,




Dredging activity near corals can increase frequency of diseases by ARC Centre of Excellence Coral Reef Studies,




Understanding the Ocean's role in Greenland Glacier melt by Woods Hole Oceanographic Institution (WHOI),




Three Defensive Docking Strategies for Sailors by Captain John Jamieson, Florida


Revealing report on Search for American yacht Nina released *Feature by Rob Kothe and the Sail-World team,














Baby Nemos finding their way home by ARC Centre of Excellence Coral Reef Studies,










The real ‘Supermoon’ story by Sail-world.com,




Sailor rescued after Facebook call for rescue by RNLI/Sail-World Cruising,








Northern Scotland: Voyage to Orkney and Shetland Isles, photos
The Galley Guys' favourite shrimp recipe
Vestas Sailrocket 3 - Over the Horizon
BoatUS speaks out about 'Ethanol-at-all-cost Agenda'
Tidal current installations will increase boating hazards
Eco-Sailboat of the future - Catherine Chabaud at work
Calling yachts in the South Pacific - rally to New Zealand
The final touch - which wax should I use on my boat?
ARC Baltic sets sail to discover Europe's 'east sea'
Another boom death. Australian sailor dies, hit by swinging boom
Galley Guru vital to the life of the cruising sailor
'Boat Handling in Marinas' by Rob Gibson - and how to get it reliably
Heart-stopping moment as whale capsizes Zodiac
If we stop killing parrotfish we can bring back Caribbean coral reefs
Climate change could stop fish finding their friends
Vanuatu ups their welcome to cruising sailors with new approach
Criminal charges mooted for owners of sunk HMS Bounty
Red faces after authorities inadvertently aid boat thief to get away
Mobiles drive traffic - 72% increase in Sail-World.com page view *Feature
Sail Estonia: a VERY new idea
Tie This 'Lifesaving' Bowline in Seconds - the easy way!   
A Beer Bummel on the Thames River   
Online weather routing - possible? Predict Wind says yes   
Why Boats Sink: Ten best tips on prevention   
The North West Passage calls: Who will answer this year?   
Polish adventure sailor in second try at North West Passage   
Whale research - new techniques expand for non-lethal methods   
Jessica Watson, solo sailing star, four years on...   
Americas solo non-stop circumnavigator crosses Pacific for research   
What is an El Niño and how will it affect my sailing? (Part 1)   
The Dinghy Nav Light Solution- a brilliantly dumb idea   
Spike in water temperatures evidence of ‘irreversible’ El Nino *Feature   
Sailing crew's battle to save yacht lost in the Indian Ocean   
Five Top Tips for selecting the best boatyard   
Tips for selecting the best boatyard   
Predictwind unlocks more features on free accounts   
Composite Rigging launches new campaign for ECsix   
When is a Captain not a Captain?   
Free app for managing your yacht   
Amazing MOB survival - 13 hours floating, rescued by fishermen   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW Cru USA
LocalAds   DE  ES  FR  IT