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Author Topic:   Fuel System Additives
jimh posted 03-27-2002 08:54 PM ET (US)   Profile for jimh   Send Email to jimh  
Please follow up with comments about any fuel system additives you have been using. What results were promised? What results were obtained? Costs? (State costs in dollars per gallon treated; use raw numbers so you don't goof up the math. If a product costs $8 and treats 60-gallons, then say it costs $8 per 60-gallons.).

I am especially interested in products that claim to prevent carbon build up or remove existing carbon build up.

JohnAz posted 03-27-2002 09:06 PM ET (US)     Profile for JohnAz  Send Email to JohnAz     
Wall-Mart Outboard Oil
1,gal,,$6.00 to 50 gal, gasoline prevents engine seiseure,,seem to work
Bigshot posted 03-28-2002 11:17 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
But does nothing about carbon John.

I run something called Berryman's B-12 carb cleaner. You can get it a Wal-Mart and Autozone, etc. It is about $3 and treats I think 20gals. It will clean a rough running carb from gum deposits, makes your plugs look pretty but will not harm your 2 stroke if you mix properly. It is like Techron on steroids. I also do a carbon free or OMC 2+4 or whatever the equivalent every year or twice a year to decarbonize even more. The B-12 will make your engine sound a little funny and I do not run it all the time, only when I think a carb is a bit gummed up or been sitting a while. It can also be used in gearcases on cars and in car tanks, good stuff. If you can't find B-12 try Techron but add more.

PS I usually run the B-12 in a 6 gallon tank. If it does not cure it in 6 gallons, time to tear down the carbs.

Bigshot posted 03-28-2002 11:19 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I did not mean the engine sounds funny on B-12. I meant it may not run perfect. It may stall when idling or harder to start because it is not gas. It does run fine once on plane, etc.
Salmon Tub posted 03-28-2002 12:30 PM ET (US)     Profile for Salmon Tub  Send Email to Salmon Tub     
I use Carbon Free. Can find at west marine. They say you can use it with every fillup, but I use it once every three or so. Careful with older engines though, I have heard that old engines that have a lot of carbon build up, especially if it coats the whole face of the piston, (rather than just in the center) may loose some compression once you clean all that carbon up. This was told to me about older car engines, so I can't say 100% if it applies to outboards, but and aluminum piston is an aluminum piston.
Bigshot posted 03-28-2002 01:07 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Carbon sticks rings and stuck rings have less compression and slop in the cylinder. Slop causes wear and wear causes premature injunkyardation.

Keep your engine carbon free unless you do not want to keep it long.

David Ratusnik posted 03-28-2002 01:32 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
Every other month I use one bottle of Techron (20 oz). About $9. Question- What is the impact of Techron, B12 etc on "leaning out" the gas? Doesn't this defeat the purpose of a certain percentage of the oil in the gas? Please educate me. Thanks David
SWarren posted 03-28-2002 01:58 PM ET (US)     Profile for SWarren  Send Email to SWarren     
I use a whole bottle of ring free fuel additive and yamaha fuel conditioner for every 65 to 70 gallons of gas I put in my boat. That is about 1/2 a tank on my revenge. I have twins so the mixture has to be doubled, it get pretty expensive, but I guess it works pretty good.
Bigshot posted 03-28-2002 02:11 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
not necessary David.

What is the key to 2 stroke longevity is lubrication. The oily gas is not just squirted in the cylinder walss like on a 4 stroke, these are 2 strokes. The mix goes past the reeds and over the crank and its bearings and under the pistons to coat those bearings and wristpins, etc. The additive can strip these areas of necessary lubricants and really screw stuff up. If gonna run something all the time, use something recommeneded by the manufacturer like Carbon-guard and ring-free. Techron is great but not every month.

David Ratusnik posted 03-28-2002 03:57 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
Biggs- Thanks. Something about the additive was not computing as it related to the 2 stroke. I'll put the Techron on hand in the truck. Perfect weather shaping up for this weekend. Enjoy. David
Swellmonster posted 03-30-2002 08:48 AM ET (US)     Profile for Swellmonster  Send Email to Swellmonster     
Yesterday, in my merc efi, I replaced my fuel filter. Before installing it, I sprayed a can of merc power tune into a container and waited for the foam to calm down. After the calm, I poored the liquid into the new fuel filter. Motor started fine and I drove fast 3k-5k for 10 minutes to clear any residue. Motor idles smoother now.
mjd65 posted 03-31-2002 11:09 PM ET (US)     Profile for mjd65  Send Email to mjd65     
115 OMC
Carbon gard or similiar product on sale every third tank or 50 gal. at recomended rate.
OMC engine tuner every 50 to 70 hrs.
Love the Wal-mart oil only brand I feel comfortable with. I used omc oil origanaly until cylinder went and they said it does not matter which oil you use as long as it has the correct rating.

Metal treatment at regular doses.

Lake Breeze Rage

Almost perfect operation for the last 266 hrs.

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