Anyone had damage from E10 gas in Mercruiser?

isaksp00

Petty Officer 1st Class
Joined
Jul 14, 2010
Messages
225
I use non ethanol gas in my 8HP outboard and small engines at home. Just bought a 19 footer with a 6 cyl fuel injected Mercruiser with Alpha drive. So far I have been buying non ethanol gas (at $3.85) at a local station and pumping it into the tank 5 gals at a time. The on-water price is $4.65 for the E0, so I avoid that. My question: there are a lot of opinions about whether ethanol gas is bad for inboard fuel injected engines like the Mercruiser. Does anyone have experience where say there actually was damage or problems? I could save almost $1/gallon if I go to the E10 from the roadside stations.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,249
fuel up with e0 or e10..... and go boating

your stressing about nothing as long as you dont let the boat sit.

E10 goes bad long before E0. so go boating often and you wont have a problem
 

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
Use the E10 and use the boat. At the end of the season fill it up and add some fuel conditioner if you want.

Most importantly is use the boat!
 

briangcc

Commander
Joined
Jul 10, 2012
Messages
2,396
I run E0 exclusively after having a fuel pump crap out and filter debris from running E10 in my Four Winns.
 

harringtondav

Commander
Joined
May 26, 2018
Messages
2,440
My only problem w/E10 was vapor lock or alcohol boiling on a very hot day. 4.3LX 4bbl Weber. 30 seconds of idling fixed it I've heard FI Mercs have a fuel cooler, so you should be good.
 

thumpar

Admiral
Joined
Jun 21, 2007
Messages
6,138
I run E10 and even let it sit all winter with no issues. I did it in the 1983 carbed boat and the newer EFI boat.
 

Oshkosh1

Ensign
Joined
Jun 8, 2009
Messages
968
It's the ONLY fuel I run in EVERYTHING. My boats, cars, trucks, lawn tractors, snowmobiles, ATV's, chainsaws...whatever. IF it takes gasoline, it's getting E-10. My boat sits with it in the tank all winter and fires right up not missing a beat come spring. I also store a couple of vintage cars and again...never miss a beat come spring even if only filled 1/2 way. I found a gas can last weekend up at my other house and know it's at least 2 years old but filled up my lawn tractor and cut the grass. Run it without hesitation...
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
An advantage of E10 is that it holds water, so a small amount of water entering the tank, in the air through the vent as fuel is used, will not accumulate in the bottom and eventually lead to 'water in the fuel' problems. It just gets carried through the fuel system and burnt as part of the fuel load.... :D

Chris........
 

Grub54891

Admiral
Joined
Jun 17, 2012
Messages
6,142
I also run e10 no issues. But in the last run of the season I run e0. Just because.....
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
13,036
Here we have no choice, it is all that is available due to the draconian EPA. I don't think E10 is a problem per se but the issue is the accuracy of the mixing in the gas tanker truck. If you get a load of e15 or e20 that's when the trouble could start. Plus, many people never inspect the gas cap gasket and that can let water in, not a bad idea to change the cap every 2/3 seasons.
 
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