I've used the Sierra brand for a long time with no issues in my many gas tanks. I've just switched over to Pri-G this year.
My fleet is listed in my signature.
My fleet is listed in my signature.
Best additive to prevent fuel gumming up the carb?
- Thread starter hardcore302
- Start date
- Joined
- Apr 25, 2023
- Messages
- 137
Stabil marine is the only additive I've added for my Yamaha outboard and for storing gasoline for a portable generator.^^^^
Do not doubt this. Just go get it and use it. End - of - story
This stuff was designed to keep very expensive yacht and outboard motors from gumming up in environments that laugh at wherever you park your car or truck or keep your small engine equipment. Salt water. Water in fuel. High humidity near 100% year round etc.
The stuff is Gasoline GOLD.
Since I have so many engines, AND a VP Fuels gas station near me, I simply use VP-C9, which never goes bad, literally. I've had some in engines for 2 decades now, no issues.
The local Tractor Supply sells a half pail (2.5 gal) of VP, 94 octane, Non ethanol fuel, which is made the same way as C9 (also a storage fuel). Lasts forever. VP says: "Product lasts 15 years in unopened can" I promise, it lasts longer than that.
The local Tractor Supply sells a half pail (2.5 gal) of VP, 94 octane, Non ethanol fuel, which is made the same way as C9 (also a storage fuel). Lasts forever. VP says: "Product lasts 15 years in unopened can" I promise, it lasts longer than that.
Same here. Wife’s motorcycle has gone 20 winters with carbs drained and sta-bil marine in the tank. I just started it up from its winter nap. Ran fine
Us guys that know know i always keep a pail around and use it for shut down and full time in 2stroke fuel
+1, but REC fuel is getting harder to find near me.
Same.
Just run Ethanol free fuel and call it a day. I've been running E0 for the last 5-7 years with no issues. Currently I have some 50:1 2-cycle fuel that was mixed using 89 octane E0 18 moths ago and my Stihl toys are still running well with it. Earlier today I filled a 20 liter Jerry Jug with 90 octane E0 for $3.999/gal.
See https://www.pure-gas.org/ for sources of E0 near you.
- Joined
- Apr 13, 2025
- Messages
- 249
Cool.
Having been in the motorcycle repair biz I had to find a way to keep customers bikes from gumming back up over winter and then claiming I did a chit job.
So I always added it to the tank before it left the shop.
What people don't know about Stabil Marine 360 is it does more than just chemically stabilize the fuel, it COATS the metal inside with a corrosion / oxidation coating that prevents the jets and orifices from oxidizing. The stuff is absolutely amazing.
So it keeps the fuel from gumming up AND in a sense, "Teflon" coats the passage ways so they don't rot as well.
It's a patented process.
All the others are just getting fuel stabilization and some protection from some type of oil additive, which does work, but oil can break down under moisture. The coating in Stabil Marine 360 does not. And it's not ALL the stabil fuel stabilizers, just the Marine 360 blue.
I stand ready to be schooled and scolded if you can prove me wrong
Oh, I know all this cause daddy owns the company
One solution for my outboard, zero turn (four stroke), my leaf blower, and weed eater (two stroke) is Star Tron by Star Brite. Stabilizes for up to two years.
Choose your poison.
https://www.goldeagle.com/brands/st...eiEj5ln9c5KZ5EKofB2Py1BMyVoGPgxowsVWBteLZK4ta
I use non-ethanol in my OPE. However, I use Sta-Bil 360 (now called Sta-Bil Seasonal). I add the Sta-Bil Storage to the last gasoline purchase of the mowing season.
https://www.goldeagle.com/brands/st...eiEj5ln9c5KZ5EKofB2Py1BMyVoGPgxowsVWBteLZK4ta
I use non-ethanol in my OPE. However, I use Sta-Bil 360 (now called Sta-Bil Seasonal). I add the Sta-Bil Storage to the last gasoline purchase of the mowing season.
I use Sta-Bil and Techron in OPE gas year around. All carbs are run dry via fuel shut off, every use. Winter and summer storage with non-ethanol fuel.
Every engine starts on the first pull after hibernation.
Every engine starts on the first pull after hibernation.
I've been using Amsoil gas stabilizer for 25 years.
Yes I've had a single carb gum up. The one in the tiller I didn't use any additive in!
https://www.amsoil.com/p/amsoil-gasoline-stabilizer-ast/?zo=515729
Yes I've had a single carb gum up. The one in the tiller I didn't use any additive in!
https://www.amsoil.com/p/amsoil-gasoline-stabilizer-ast/?zo=515729
Blue Marine Stabil.
Another vote for marine Stabil. Before using it, my motorcycle carbs used to plug the pilot jets with some regularity, since the bike didn't get ridden regularly. After, never a problem. Never.
I use marine stabil. At least in the lawn mower gas doesn’t stay in the tank for more than two weeks. What ever doesn’t get used in the can in three months get dumped into the vehicles. Buy fresh gas every three months.
I recently had a fight with my Yamaha generator, after the pilot jet plugged. Access to the jet is bad, the learning curve, regarding what to remove to get at the carb, very frustrating. After reading your comment here, I'm going to make sure the carb is properly drained. Thanks for the reminder...
