Pure gas

**Tarheelwx** · 06-24-2020, 12:12 PM

Do any of you that are using pure gas also use any kind of additive? I had been using regular gas and was using an additive. Now I use pure gas without an additive. I was wondering if I should still use an additive.

Thanks
TW

**NCkenner** · 06-24-2020, 12:49 PM

Using non ethanol fuel will eliminate the ethanol issues but you still need to clean injectors and carbon deposits occasionally. Sea foam, Techron, Quick kleen, etc will keep everything running great for a long time.

Chris

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**slowhand** · 06-24-2020, 08:38 PM

Pure gas and Sea Foam

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**Tarheelwx** · 06-24-2020, 09:07 PM

How much sea foam to a gallon? I have a 115hp Optimax.

**NCkenner** · 06-24-2020, 09:45 PM

I think the bottle suggests a bottle to 20 gal. The instructions are on every brand I’ve ever used.

Chris

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**kelbro** · 06-25-2020, 04:27 AM

Mann Marine suggested to use the K100 stuff. I've used SeaFoam for years with good results though.

**MThook** · 06-25-2020, 08:14 AM

Pretty sure I read that Sea Foam wasn't good for 4 stroke.

**DoyleAlley** · 06-25-2020, 09:10 AM

Originally Posted by MThook

Pretty sure I read that Sea Foam wasn't good for 4 stroke.

I don't know why not. It is used all the time in cars, lawnmowers, motorcycles, etc. by lots of people (including me).

**DoyleAlley** · 06-25-2020, 09:14 AM

Originally Posted by NCkenner

I think the bottle suggests a bottle to 20 gal. The instructions are on every brand I’ve ever used.

Chris

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There are three general uses for Sea Foam. One is as a fuel-system cleaner which would use the ratio you described. Second, is a carbon preventative. For two-stroke engines, I run Sea Foam at the rate of 1oz to 10 gallons of gas. That helps to prevent carbon from building up on the rings and valves. Third is as a shock treatment. That ratio is 1 can to 3/4 gallon of fuel - used in run/sit/run/sit sequence until the heavy smoking stops (burns carbon off of rings and valves).

**Barnacle Bill** · 06-25-2020, 05:58 PM

Originally Posted by DoyleAlley

There are three general uses for Sea Foam. One is as a fuel-system cleaner which would use the ratio you described. Second, is a carbon preventative. For two-stroke engines, I run Sea Foam at the rate of 1oz to 10 gallons of gas. That helps to prevent carbon from building up on the rings and valves. Third is as a shock treatment. That ratio is 1 can to 3/4 gallon of fuel - used in run/sit/run/sit sequence until the heavy smoking stops (burns carbon off of rings and valves).

It is also a stabilizer (see back of can). Also if you use it or anything else for cleaning the carbon out do not do it on a nice white driveway. It really makes a mess when done properly.

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