"I decided a long time ago that I would not sell all the boats in the world, but I would sell the best quality at the lowest price I can."

Ethanol Get on Board!

Dave's Marine and ethanol fuel.

I have looked for an article that could explain why your marine engine is having trouble performing the way it used to, I can?t find a good simple explanation, so I will be doing my own.

10% ethanol blended in fuel was mandated by Congress in late 2006 since then some states
have used their own judgment as to how much ethanol to allow.

Most modern marine engines ( 5 years and newer ) will operate on that fuel blend as long as it is not above 10%. However, some precautions are necessary; Mercury Marine recommends their fuel stabilizer ,and fuel system cleaner be used with every fill up.

Ethanol in fuel is hygroscopic. Which means it will absorb water directly from the surrounding air. When the ethanol has reached saturation it will phase separate and deposit water in the fuel tank.

Your engine will pick up this water and can cause severe damage to fuel parts as well as internal engine parts.

We have found that carburetors on older engines are especially affected by this fuel.
The result; a gummy resin which form in the fuel bowl, and can cause low and high speed jets to clog,
wnding with the engine either not being able to idle or run wide open throttle.

The only way to clean the carbs is to disassemble them and soak them in a cleaning agent.
Modern fuel injection systems are less susceptible than the older carburetor engines to gumming because the fuel system is closed. Do keep in mind, however, that water ingestion will damage the internal injection parts on old or new engines. A small micron water separator is recommended to forgo these problems.

Modern gasoline blends should never be stored for long periods of time, a maximum time period would be
two to three weeks. If your boat is going to be out of service for that length of time, be sure the tank is 7/8ths full and has the stabilizer added to it.

There are several symptoms of e-10 fuel problems;
* Engines may be hard starting or may not start if small fuel passages are clogged

*Acceleration may not happen, stalling upon acceleration, and or complete dying of the engine may occur.

*The engine may start well and run fine while it is cold, but after a short time of idle or stopping
it may be flat or not run at all.

* A common occurrence is Vapor Lock, fuel pumps will not pump vapor,after sitting hot for a while the engine heat soaks ( get's hotter) this will boil off the fuel in the pump and or carburetor so that the engine will fail to start, or die off after starting.This problem can occur while under way, bubbles will form in the fuel line and cause a rough running
or stalling condition.

What can you do to prevent this?
First of all call your Congressman! Ethanol has never been proved to save anything; neither cost nor pollution.
Be sure to add Mercury Marine fuel stabilizer, and Fuel system cleaner to every tank.Also, keep your tank full
or nearly full when stored. Furthermore you should always disconnect the fuel line on outboards and let them run dry
before pulling out of the water, Also, allow an inboard engine to idle for a time before shutting it off, as well allowing it to idle for a while after starting hot.
These few things will help the issues, but are not a full proof resolution.
If you have any further questions please do not hesitate to call one of the techs at Dave's Marine ! 740 423 6541