Off season fuel conditioner

Things that are of general interest.
User avatar
shade2u2
Royal Aluminum Star
Posts: 237
Joined: Mon Jul 21, 2014 3:11 pm
Location: Marietta, Ohio -mile marker 172

Off season fuel conditioner

Postby shade2u2 » Wed Sep 12, 2018 1:48 pm

What do you add to the tank for the winter?
Why did you pick that one?

Getting ready to top off the tanks for the season end.
John
1986 39 Sedan w/Crusader 454 & 1.92 drive.
1984 28 Express Hardtop FOR SALE
w/single 360 1.5:1 drive
Ohio and Muskingum Rivers (Marietta, OH)

jralbert
Site Admin
Posts: 545
Joined: Fri Jul 11, 2014 9:15 pm

Re: Off season fuel conditioner

Postby jralbert » Wed Sep 12, 2018 3:25 pm

I always used a "stabilizer" called Sta-bil. Can't say why I used it. At the same time, I always took mfr claims with a couple of grains of salt. But I didn't want to chance a bad outcome and it was relatively cheap stuff. I never saw any objective article reporting on independent tests of stabilizer concoctions. I think fuel additives are somewhat over-hyped.

Others on the forum may be able to point to good reasons for one brand over another... or any brand for that matter

UPDATE: Got un-lazy and thanks to Google found this citation on testing: https://www.boatingmag.com/gear/boating ... ers#page-3

ANOTHER UPDATE: make sure some of the stabilized fuel is in t he carbs before hibernation - that is, run some thru the engine before you winterize.
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD

User avatar
carl
Royal Aluminum Star
Posts: 328
Joined: Sun Feb 08, 2015 5:58 pm

Re: Off season fuel conditioner

Postby carl » Wed Sep 12, 2018 6:44 pm

Here are a few tips...Go ahead and top off your tanks before you pull the boat for the winter to help minimise the condensation space within, hopefully your buying 100% Gasoline with no ethanol, if not you should. Add Sta-Bil per the instructions. Any additive only works best with fresh fuel, if your fuel is not fresh try running it out before refilling. A water separating fuel filter is best before the carburetor(s). One often overlooked item in the fuel system is the integrity of the O-Ring on your fuel fill cap(s). Pull your caps and check them, if there missing or cracked replace them with new ones. They are available. Otherwise every time it rains or snows the water will make it into your tanks and come spring you could be looking at a substantial amount of water in your fuel to deal with. Additionally I have used "Marvel Mystery Oil" in every fuel tank on everything I've ever owned for the past 40 years and I swear by it. Added to the fuel it gives you top end lubrication like nothing else out there, you can hear it and you can feel it...just saying.
1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

Fastjeff
Site Admin
Posts: 1016
Joined: Sat Jul 12, 2014 5:06 am
Location: Rock Halll, MD
Contact:

Re: Off season fuel conditioner

Postby Fastjeff » Thu Sep 13, 2018 7:09 am

I've also used Startron. Not sure if it's any better (or worse). The main thing is to fill the tank(s) full as possible with conditioner, then run the motors a bit to get it into the fuel system.

Here's a piece of good news on this hotly debated subject: This summer was such a mess--way too hot, then raining like crazy, then... repeat. I filed the tank of my 19 footer last November with that 10 % ethanol crap, stabilized the fuel, and burnt only half of it this entire year. Still, the motor ran just fine. I intend to pump the rest out before refilling with fresh gas and more stabilizer, but that really old gas DID run fine.

Jeff

PS: Boat is stored outside.
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

User avatar
shade2u2
Royal Aluminum Star
Posts: 237
Joined: Mon Jul 21, 2014 3:11 pm
Location: Marietta, Ohio -mile marker 172

Re: Off season fuel conditioner

Postby shade2u2 » Thu Sep 13, 2018 10:22 am

Thank you for the details.
Good information.
John
1986 39 Sedan w/Crusader 454 & 1.92 drive.
1984 28 Express Hardtop FOR SALE
w/single 360 1.5:1 drive
Ohio and Muskingum Rivers (Marietta, OH)