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Ethanol-free gas in boat - 18 months old???

Old 01-16-2020, 10:04 AM
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Default Ethanol-free gas in boat - 18 months old???

2006 Yamaha 115 - four stroke. Due to Hurricane Michael and out-of-town work, I have not used my boat in 18 months. It probably has 1/2 tank of ethanol free gas. I cannot remember if I added any fuel stabilizer to it. I have cranked the motor a few times and it ran fine on the hose.

Any Suggestions?

Old 01-16-2020, 10:06 AM
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Originally Posted by rickpcfl View Post
2006 Yamaha 115 - four stroke. Due to Hurricane Michael and out-of-town work, I have not used my boat in 18 months. It probably has 1/2 tank of ethanol free gas. I cannot remember if I added any fuel stabilizer to it. I have cranked the motor a few times and it ran fine on the hose.

Any Suggestions?
probably fine, i once ran 2 year old ethanol free gas without issue, just make sure you have fresh racor filter and engine-mounted filters on, and backups

extract a sample and look at it

post up a pic here
Old 01-16-2020, 10:10 AM
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Originally Posted by mystery View Post
probably fine, i once ran 2 year old ethanol free gas without issue, just make sure you have fresh racor filter and engine-mounted filters on, and backups

extract a sample and look at it

post up a pic here
Argggg!!!!! Why didn't I think of that? Time to go get a pickle jar and squeeze the bulb.

Old 01-16-2020, 10:30 AM
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And smell it
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Old 01-16-2020, 11:03 AM
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If your tank previously was nice and clean and with no water, I think you'll be fine with non-ethanol, even without stabilizer.
Old 01-16-2020, 12:29 PM
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I had the same problem.
I added some Startron before starting and didnt have any problems.
Old 01-16-2020, 02:28 PM
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Originally Posted by john0767 View Post
I had the same problem.
I added some Startron before starting and didnt have any problems.
be careful, many fuel treatments you are supposed to add while fueling (i.e. to fresh fuel)
Old 01-16-2020, 02:30 PM
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I occasionally have the same issue with one of my boats. I usually fill the rest of the tank up and let her run...No problems.--as long as it was ethanol free. I do "treat" my fuel when putting it in, except when I am using tank fulls in a few days. Stabil and Startron, when I put the fuel in.
Old 01-16-2020, 02:39 PM
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Fill up the tank with more ethanol free to dilute whatever varnish may have formed. And don't be in a position where you don't know if you stabilized - do it each and every time you fill up.
Old 01-16-2020, 02:47 PM
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usually $125 an hour + filters ($30) to polish fuel, how much fuel are talking about? Ill assume not a lot based on engine size. is it worth $150 to mess around with it?
Old 01-16-2020, 03:28 PM
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Originally Posted by WPBTH View Post
usually $125 an hour + filters ($30) to polish fuel, how much fuel are talking about? Ill assume not a lot based on engine size. is it worth $150 to mess around with it?
Probably 20-30 gallons. I would gladly empty the tank if I could, but I don't think it is easy. When the hurricane hit, I tried to drain it to power the generator as fuel was in short supply but couldn't figure out how to do it.
Old 01-16-2020, 03:36 PM
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Originally Posted by rickpcfl View Post
Probably 20-30 gallons. I would gladly empty the tank if I could, but I don't think it is easy. When the hurricane hit, I tried to drain it to power the generator as fuel was in short supply but couldn't figure out how to do it.
Not too hard to get most of it out. There will be a nipple connector either under the cowl or close by in the line leading to it. If you don't have a bulb just add one with a length of hose and pump away. Or, you could disconnect on the outlet side of the fuel pump, add a piece of hose and turn on the key. I wouldn't let that pump continually until it is empty though.
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Old 01-16-2020, 04:15 PM
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I purchased a very good gasoline pump from Jeff Bezos and was able to easily pump out all I needed to. If you have bad fuel (separation) it's in the bottom of the tank. De hook up a gas line and take out 5 gallons. If it's clear just put it back in or put it in your car/truck. Your engine is worth protecting (I call it self insurance!)

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Old 01-16-2020, 05:56 PM
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Originally Posted by john0767 View Post
I had the same problem.
I added some Startron before starting and didnt have any problems.
you wouldn't have had any problems if you didn't use it.
Old 01-16-2020, 05:57 PM
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You have already started the motor and said it runs OK, why worry now?
Old 01-16-2020, 05:59 PM
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Originally Posted by noelm View Post
You have already started the motor and said it runs OK, why worry now?
I'm just worried about putting 20-30 gallons of this fuel through the motor.
Old 01-16-2020, 06:05 PM
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I would call the some fuel polishing places and just see if you can drive the boat over maybe before or after their shift. That will take 20-30 mins at the most. They will clean the fuel and get all the varnish out of the tank
Old 01-17-2020, 03:35 PM
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Check your fuel filters and change them out at a much higher rate than normal until it's all been replaced.
Old 01-17-2020, 04:59 PM
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That is a reasonable time frame. Dump in you favorite fuel addition, buy a few extra fuel filters, and take if for a ride. Keep your tow insurance up to date. Good chance you will be fine b
Old 01-17-2020, 05:18 PM
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Originally Posted by mystery View Post
be careful, many fuel treatments you are supposed to add while fueling (i.e. to fresh fuel)
Yeah! most of them are full of ethanol..

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