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post #1 of 40 Old 02-21-2019, 07:51 PM Thread Starter
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From: Seafoam Sales PDF Gummed Carb.

Engine type: all carburetor Gasoline engine makes, 2- and 4-stroke
Product(s) for application: Sea Foam Motor Treatment
Part number(s): SF16
Quantity: 1 can
HOW TO CLEAN A
GUMMED-UP GASOLINE
CARBURETOR
1. Check condition of spark plug(s).
2. Drain or siphon the old fuel from the tank.
3. Drain each carburetor bowl. (see IMPORTANT if not easily accessible)
4. After removing gasoline from the tank and carburetor, add a mixture of Sea Foam followed
by 8 ounces of fresh gasoline (1 to 2 ratio).
5. With the cleaning mixture in the fuel tank, crank/prime/rope-pull the engine to draw the
cleaning mix into the carburetor(s).
6. Allow engine to sit and soak Overnight to 24 hours if possible, 48 to 72 hours when
necessary.
7. Once the engine starts and runs, Sea Foam in the tank will continue to dissolve residues as
fuel is drawn through the carburetor.
8. Add more fresh fuel when ready to operate engine under load (working engine).

IMPORTANT: If unable to drain carburetor or old fuel remains in tank, remove spark plugs and
add a high concentration of Sea Foam and fresh fuel to the tank. Follow steps 5 and 6 with spark
plugs removed.


When added to gasoline carburetor fuel systems, Sea Foam Motor Treatment works to help:
dissolve gum and varnish in fuel tanks and carburetor passageways
clear out needle valves, bowls, jets, nozzles
clean hydrocarbon residues and deposits from intake and chamber areas
clean and lubricate intake areas, throttle valves, upper cylinders

Maintenance Tips:
Add 1 ounce of Sea Foam per gallon to every tank of carburetor engine fuel
Use Sea Foam Spray to clean and lubricate carburetor intakes Excellent for long-term storage
Sea Foam in your tank at all times is always cleaning and lubricating the entire fuel system
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post #2 of 40 Old 02-21-2019, 08:23 PM
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I hope it works!

I have a small 4-stroke Honda generator, which had a somewhat-gummed-up carb when I bought it. It needed half-choke to run smoothly. I added Seafoam to the gas and ran that for a while, without an improvement. I eventually (before this document existed) tried emptying the tank and the carb bowl, and pouring in straight Seafoam. I let that sit for a day or two, as I recall. Drained it out, and refilled with gas, it still needed half-choke to run smoothly.

I eventually ran the carb through my ultrasonic cleaner, and now it runs great.

So I tried something pretty similar to what this is suggesting, but it was not successful, unfortunately. Maybe this actual procedure works better. It would be great if it worked, it's easier than disassembling the carb for cleaning.

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post #3 of 40 Old 02-21-2019, 08:31 PM
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it would be interesting to hear from members that used Seafoam with good results.

just like Red, I have not had good results with it. With Honda carbs I can do an inframe carb clean out ( without taking off and dismantling ) and have almost a 95% success rate doing that. In really stubborn cases when a carb has been sitting for years , usually have to take completely off and take apart.

I can do an inframe carb cleaning in about 20 minutes. faster than waiting for Seafoam to work and it usually doesn't anyway.

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post #4 of 40 Old 02-22-2019, 05:40 AM
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I have had better luck with Mechanic in a Bottle than Seafoam on poorly running lawnmower engines. They use almost the same instructions.
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post #5 of 40 Old 02-22-2019, 07:01 AM
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Used Seafiam and found it very expensive with no results. Pull carb and clean it. Fast and cheap.
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post #6 of 40 Old 02-22-2019, 07:17 AM
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Hmm... Before having non-E gas available I always used a blend of Seafoam and Startron in all my OPE. Never drained the tanks or ran carbs dry. Just put the machines away until the next season and never had a problem. I am positive I would never have gotten away with that just leavi g untreated Ethanol blend sitting in the tanks and carbs. Something worked.

Joe

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post #7 of 40 Old 02-22-2019, 07:43 AM
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i use it in all my stored gas and small power stuff. i have not removed a carb in 15 years. i store everything with the same gas seafoam mix all year long... i might use 3 cans every year...just for reference

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post #8 of 40 Old 02-22-2019, 08:05 AM
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Personally, I'm not trying to comment on how effective it may be at avoiding problems in the first place. That wasn't the focus of the first post.

I was offering hands-on experience with trying to use it sort of as described above, to fix an already-existing problem. In my experience, it has not helped for the several engines where I've tried running it mixed with the gas. And even using it straight didn't help.

Maybe my experiences are the exception, I don't know.

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post #9 of 40 Old 02-22-2019, 09:13 AM
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Quote:
Originally Posted by RedOctobyr View Post
Personally, I'm not trying to comment on how effective it may be at avoiding problems in the first place. That wasn't the focus of the first post.

I was offering hands-on experience with trying to use it sort of as described above, to fix an already-existing problem. In my experience, it has not helped for the several engines where I've tried running it mixed with the gas. And even using it straight didn't help.

Maybe my experiences are the exception, I don't know.
You're correct, Red. It seemed to be a good preventative for my machine problems but may not actually be a "repair" after the damage has been done.

Joe

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post #10 of 40 Old 02-22-2019, 09:35 AM
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Quote:
Originally Posted by micah68kj View Post
Hmm... Before having non-E gas available I always used a blend of Seafoam and Startron in all my OPE. Never drained the tanks or ran carbs dry. Just put the machines away until the next season and never had a problem. I am positive I would never have gotten away with that just leavi g untreated Ethanol blend sitting in the tanks and carbs. Something worked.
I do exactly the same, Seafoam & Startron!
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