Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-16-2021, 01:35 PM   #1
Veteran Member
 
City: Vermilion
Join Date: Jun 2020
Posts: 34
What to do with bad gas

No, I donít need a Tums. What I do need is some good advice. I have old fuel in my gas tank. Itís capacity is 129 gallons and itís maybe 1/2 to 3/4 full. Not sure. Fuel sender isnít working. This tank is wedged in the back of my engine compartment behind 2 GM 454 engines. It ainít cominí out as long as I own it. I am rigging up a system to pump the fuel out of the inspection port through two in line filters and a water separator then back in through the filler pipe. Probably will recirculate 3-4 times. Will this allow me to make the gas useable?
Farandaway is offline   Reply With Quote
Old 06-16-2021, 01:44 PM   #2
Senior Member
 
Unclematt's Avatar
 
City: Swansea
Vessel Name: Seaview
Vessel Model: Sundowner 32
Join Date: Apr 2020
Posts: 153
It depends how old the gas is and filtering wont bring the octane back. The other issue is phase separation which is when the alcohol and gasoline separate and clog things up. We take old gas and mix it with the new gas in our vehicles. They have a computer that will compensate as needed. We own a outdoor power equipment dealership and see it all the time.
Unclematt is offline   Reply With Quote
Old 06-16-2021, 01:46 PM   #3
Guru
 
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft Catalina 381
Join Date: Aug 2019
Posts: 3,660
Pull a sample out of the tank and see what the stuff looks and smells like. If it's only a couple / few years old (especially if stabilized) and it still looks and smells like gas, I'd add some fresh high octane to wake it up a bit, filter it and run it. If it looks and smells more like varnish, it's too far gone and will need to be pumped out and disposed of.
rslifkin is offline   Reply With Quote
Old 06-16-2021, 01:48 PM   #4
Veteran Member
 
City: Vermilion
Join Date: Jun 2020
Posts: 34
Quote:
Originally Posted by Unclematt View Post
It depends how old the gas is and filtering wont bring the octane back. The other issue is phase separation which is when the alcohol and gasoline separate and clog things up. We take old gas and mix it with the new gas in our vehicles. They have a computer that will compensate as needed. We own a outdoor power equipment dealership and see it all the time.
The gas is at least 3 years old maybe more. So my best option is to mix in new gas with the old?
Farandaway is offline   Reply With Quote
Old 06-16-2021, 01:49 PM   #5
Guru
 
City: Rochester, NY
Vessel Name: Hour Glass
Vessel Model: Chris Craft Catalina 381
Join Date: Aug 2019
Posts: 3,660
Quote:
Originally Posted by Farandaway View Post
The gas is at least 3 years old maybe more. So my best option is to mix in new gas with the old?
Find out what the old gas looks and smells like first. That'll give you an idea of how bad it really is and whether you might be able to save it or not.
rslifkin is offline   Reply With Quote
Old 06-16-2021, 01:53 PM   #6
Veteran Member
 
City: Vermilion
Join Date: Jun 2020
Posts: 34
Quote:
Originally Posted by rslifkin View Post
Pull a sample out of the tank and see what the stuff looks and smells like. If it's only a couple / few years old (especially if stabilized) and it still looks and smells like gas, I'd add some fresh high octane to wake it up a bit, filter it and run it. If it looks and smells more like varnish, it's too far gone and will need to be pumped out and disposed of.
Iíve considered having it pumped out but I canít seem to find a place that will do that. Itís in the water at the marina. Seems like a tricky operation. What do I look for when I search for companies that do that?
Farandaway is offline   Reply With Quote
Old 06-16-2021, 03:39 PM   #7
TF Site Team
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 12,196
It depends on what type of gas you have. If it has ethanol in it it is probably beyond saving. If it is ethanol free, called rec gas here, it should be fine. We have used 4 year old rec gas without any issues. We just put some stabilizer in each year and it ran fine. But the ethanol gas will phase separate and then it isnít to be trusted. It can ruin an engine according to some of the mechanics.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 06-16-2021, 06:13 PM   #8
Guru
 
Benthic2's Avatar
 
City: Boston Area
Join Date: Feb 2017
Posts: 1,912
You could pump it out yourself with one of those pumps that attaches to an electric drill and a hose down your fill pipe but it might take a while, and I'm not sure what you do with it once its out.
Benthic2 is offline   Reply With Quote
Old 06-16-2021, 07:24 PM   #9
TF Site Team
 
slowgoesit's Avatar
 
City: Puget Sound
Vessel Name: Muirgen
Vessel Model: 50' Beebe Passagemaker
Join Date: May 2019
Posts: 1,216
The thought of using an ELECTRIC drill pump to pump gas terrifies me! If you use a drill pump, better to use an air driven drill with a compressor 30 feet away! Just my take. Once you get the fuel out, I would put in my car 5 gallons/fill up, pouring from the top of the tank if using 5 gallon cans, and if using a 55 gallon drum, leave the last 6 inches or so in drum, pour into a home depot or lowes bucket, if anything is separated, don't use the bottom stuff. Otherwise, in it goes! 5 gallons of old fuel in a 20 gallon or so gas tank is not going to harm anything IMHO.
__________________
Vessel Name: Muirgen
Vessel Model: 50' Beebe Passagemaker
slowgoesit is offline   Reply With Quote
Old 06-16-2021, 07:40 PM   #10
TF Site Team
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 12,196
We had a center console that had ethanol gas in it and we were moving and then the winter came so I couldnít run it out. I had the local repair shop pump it out. Charged me about $4 per gallon to pump it out and dispose of it. Donít know what they did with it but from then on I never put ethanol gas in the boat, just rec gas.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 06-16-2021, 07:42 PM   #11
TF Site Team
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 12,196
Quote:
Originally Posted by Farandaway View Post
Iíve considered having it pumped out but I canít seem to find a place that will do that. Itís in the water at the marina. Seems like a tricky operation. What do I look for when I search for companies that do that?
You might look at a gas pump for a truck so that it is rated for gas. Pump it into 5 gallon cans. Then just have to figure out how to dispose of it. Be very careful about fumes.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 06-16-2021, 09:06 PM   #12
Guru
 
Lepke's Avatar
 
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 2,393
A good fuel conditioner will add combustion efficiency and help a filter system like Racor remove the water. If the gas is a single consistency, it can probably be burned with a good conditioner and octane booster. The carburetors may need cleaning first.

It's a lot easier to go on a cruise than pump out 70 gallons of gas without blowing up.
I've burned a lot of old gas and always made it work in the engine without damage. One option of disposal is to add it to a vehicle that is mostly full.
Lepke is offline   Reply With Quote
Old 06-16-2021, 09:30 PM   #13
Guru
 
tiltrider1's Avatar
 
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 2,634
Chevy 454’s burn just about anything. Certainly I would look at a sample to be sure it’s not turned into something strange. If it looks and spells like gas, use it.
tiltrider1 is offline   Reply With Quote
Old 06-16-2021, 10:32 PM   #14
TF Site Team
 
koliver's Avatar
 
City: Saltspring Island
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 4,245
Seafoam
Use a few cans, at $10 each, will make crappy gas useable. Each can is good for a gas tankful on a car, figure 20gal/can.
Then never buy gas that has ethanol in it again.
__________________
Keith
koliver is offline   Reply With Quote
Old 06-17-2021, 01:25 AM   #15
Guru
 
Benthic2's Avatar
 
City: Boston Area
Join Date: Feb 2017
Posts: 1,912
Quote:
Originally Posted by slowgoesit View Post
...The thought of using an ELECTRIC drill pump to pump gas terrifies me! ...
If you are using a hose there will be no ignition problems. As long as the drill is not right over the boat's fill tube or too close to the receiving vessel there wouldn't be any risk.

Just ask Mel !!
Attached Images
 
Benthic2 is offline   Reply With Quote
Old 06-17-2021, 01:30 AM   #16
Guru
 
Conrad's Avatar
 
City: Calgary
Vessel Name: Blue Sky
Vessel Model: Nordic Tugs 42 Hull #001
Join Date: Oct 2007
Posts: 1,929
I used to pour old outboard gasoline into my car's fuel tank until last year. The fuel was bad - really bad - and caused a significant repair bill on the vehicle engine. Never again.
__________________
Conrad
Berthed in
Campbell River BC
Conrad is offline   Reply With Quote
Old 06-17-2021, 05:40 AM   #17
TF Site Team
 
Bacchus's Avatar
 
City: Seneca Lake NY
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 5,200
Many repair shops in the NE burn waste oil to heat their shops. The mechanic/ owner that does my auto / RV work pumped out a trailerable boat and said he planned to mix it in with his waste oil as long as the volume was small. He is rather conservative and not a shade tree mechanic and the shop is still there so it worked OK.
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
Bacchus is offline   Reply With Quote
Old 06-17-2021, 05:59 AM   #18
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 21,964
If you can obtain a 5 gal glass jug , put 5G in and let it sit for a couple of days..

The water & crud will drop to the bottom, pull off the clear gas & dump the rest.
FF is offline   Reply With Quote
Old 06-17-2021, 06:57 AM   #19
Guru
 
Pete Meisinger's Avatar
 
City: Oconto, WI
Vessel Name: Best Alternative
Vessel Model: 36 Albin Aft Cabin
Join Date: Oct 2012
Posts: 2,131
I have a 1978 Chev truck. It will burn just about anything in moderation.

I think dilution is your solution.

pete
Pete Meisinger is offline   Reply With Quote
Old 06-17-2021, 07:04 AM   #20
Guru
 
mvweebles's Avatar
 
City: Saint Petersburg
Vessel Name: Weebles
Vessel Model: 1970 Willard 36 Trawler
Join Date: Mar 2019
Posts: 2,685
While my experience is diesel vs gas, I had about 100 gal of 12+ year old diesel that was dark and smelled like linseed oil. In San Francisco Bay at the time, I was unable to find someone to remove and dispose without a hi-level HazMat protocol. Quote started at $4k. I triple dosed with Standyne and diluted the fuel. My 35 year old Perkins NA 75 HP 4.236 didn't skip a beat. I doubt a newer common rail engine would be as accepting.

Tough call. Sort of depends on how bad the gas is. My home is Florida but I also spend time in mountains of Colorado. The hot/moist climate of Florida really accelerates degradation and decomposition. Absent a reasonable alternative, if your 454s are older with carburetors, I'd be tempted to try running the fuel through them with high quality gas additive plus dilute with hi-octane gasoline (if available) to offset. I wouldn't run WOT though, more of a fast cruise.

Good luck.

Peter
__________________
M/V Weebles
1970 Willard 36 Sedan Trawler
Current Location: Ensenada MX
mvweebles is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 03:11 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012