Great video man, i have the same motor and it had rough idle and sometimes rough at wot but i did what you said and after was completely fixed, thanks!

In conclusion after reading 75 replies: anyone who asks a question in here will 100% not get a reply so dont bother asking questions here. However you will get a thumbs up. Yay! 2nd it seems the jury is out on Sea Foam, the guys who use it either have mixed results or terrible results the guys who use it and say it's great are few. The replys I read against using sea foam seem much more valid with good explanations. Verdict is hung jury. My advice: just do regular maintenance, use proper fuel oil ratios 100% of time, dont use last years gasoline, store motor in building above freezing during winter, run all your fuel out of motor when in the water before trailering by disconnecting fuel supply line until engine dies, dont be afraid to use full throttle for more than 15 minutes during every outing, and let motor run for several minutes before taking off and lastly dont use premium octane in motors built for 87 and 89 octane. Avoid ethanol. And when rebuilding carb kit only use factory and never aftermarket plus never forget to change out the float when doing carb kit cleaning/ rebuild. Tip: put a marker board in your garage and log all your small combustible engine specs and always winterize your engines. I guarantee if you follow these basic guidelines you'll be able to run your same outboard until your grandson is ready for a timeless hand me down. As of right now the only thumbs up is my own. 🤣

Awesome video! This was the fix to clean out the carbon buildup in the carb of my Mercury 115 2 stroke without actually taking off the carb, and cleaning it out. The motor now idles as it should and runs amazing!

I used it in a few things and it is amazing stuff.

sea-Foam is great... actually works, I put it in ALL of my gas powered equipment and vehicles.

This worked for me. The smoke was crazy!!!!

I did the same thing earlier this year, before I saw this video, on a 2001 50 HP Yamaha outboard on the trailer with muffs. I also sprayed the carbs while it was running. Then, I let the Seafoam sit in the carbs for a week before running the second half gallon through in the same manner. Engine now starts easily for the first time since I've had it, and it runs beautifully.

always a good idea to do your plugs after a treatment in my experience. The smoke is no joke. Looks like something major is on fire. I can't believe the FD has never responded to any of my Seafoam sessions.

Brilliant Idea. My boat takes 180 gallons to fill (90 per tank). You just saved me a fortune and I'm not even convinced this stuff works. I plan to search for technical/test data to evaluate, but I'm not waiting, your video shows me to "go for it". Your video is priceless!!!! Thank you and Happy and safe boating Captain.

Everybody: don't be afraid to rebuild your carburetors. Use the factory kit, not the aftermarket kit. If the motor is really old, replace the carburetor floats also - they absorb fuel over time.

Great video. My 1990 Yamaha 200 ran great at the start of the season. Wouldn't go above 2800 rpm for the past few weeks. Followed your advice...spit and sputtered for about 10 min after the "procedure"... then shot out like a dart...4500 rpms...thanks.

Seafoam is the best fuel additive…I use it in everything I own. Saves a lot of heartache

It works, I did the same thing you did. Started a lot quicker after sea foaming. I was told Sea foam was relay made for 2 stroke engines. Thanks

One thing “power tuning” (what this process is known as) does, especially on two strokes, is decarbons deposits between ring lands, and frees stuck piston rings. I’ve taken some customers two strokes that were known to be mixed rich, and had varying compression numbers between cylinders, and completely remedy them after intently performing a “power tune” to their outboards. Some of the older service manuals actually state you should do this every couple seasons, sometimes every season, to ensure proper piston ring performance.

I just did the shock treatment today, motor ran like hell and smoked like crazy. That when I was done and ran it on regular gas it ran Nice & smooth.

Always used seaform as and additive. Never seen someone used it at such a full strength. I know now it won't hurt it and it close to the time to change the plugs so I will give it a try.

Seafoam is a good product . Use it in my classic corvette for winter lay up period for fuel tank, fuel lines,and carb

Excellent and detailed video. Thank you!!

Glad I found this video! Now I can try this on my 1990 90hp Merc and see how it does because right now it runs like crap.

Great video worked perfectly 96' Merc 40hp 4 cylinder oil injected Thank you

Thank you so much 👍🏻👍🏻

A typical carb clean will do fine...carbs don't collect carbon..thats on the exhaust side of combustion...all its doing is cleaning the air and valve ports in the carb body...same as can be done with simple carb clean.. Ethonal doesn't hurt a 2 stroke it's the absorption if moisture it accumulates when not in a sealed system...and also the fuel lines needs changing on most old models because of cheap lining separation and then crumbling up and clogging up the carb...also it'll gell up in the bowl if left to long ... I tell all my people not to buy more than you'll need for a trip out if your not going regularly because of the gas going bad so fast these days...on the positive side of ethanol added is you don't have that pre ignition cladder climbing hills in our auto's... Some ask what is ethanol ? It's corn licker...pure dragster fuel...lol...

Glad to hear him say, replace the plugs

Just at the chicago boat show talk to a master tec no seafood leaves A residue .Used seafoam all the time but my 150 merc still ran ruff.He said quick clean run gas down double the mixture in 5 gal run it hard should notice a difference.Also use marine stable for storage

Add startron to all your gas and you won’t have to deal with this. I have a Honda quad at cabin that I only use during deer season. Starts up and runs smooth for the last 12 years. I treat all my storage gas cans and seasonal equipment with it. Chainsaws,generator,snowblower………

I just pour it in the fuel take occasionally and it makes a huge difference

Bro your channel names prestige worldwide and your real name is Brandon??? Oh I love it.. I was just scrolling and I say the channel name and was cracking up

Great video!! Thanks for sharing!

Do not forget to add 2 stroke oil to the gallon mix if you have a two stroke motor!

I ran a whole can through my Merc 50hp 2 stroke, in 6 gallons of gas. It trolls to barely running now. I believe it cleaned something. It's a 1985 model.

Awesome video! Does this also clean out the exhaust?

Just a tip costing 10-13 per can check price of a gallon of seafoam it may be cheaper, nice video it helped mine thank you

Love Seafoam....great stuff!!! I always use it and Mercury 50 HP 4 stroke runs great but it is a 2020....

I bought a 2020 Tracker Classic XL a year and a half ago and have run 1 oz per gallon of regular gas ( live in CA so ethanol gas is available). This have kept my Mercury 4 Stroke 50 HP running tops with zero issues. I do change oils regularly.

Fish appreciate a carbon free carberator.

Great video, I like Sea Foam aswell , but I noticed your Merc is fuel injected, it doesn't have carburetors.

Thx

I run seafoam in every tank of gas. Saves me from having to do that.

This outboard is fuel injected and from my understandings there are little filters (mesh strainers) on fuel rail side of each fuel injector and would probably be beneficial to replace them evey so often

Cleaning up the fish too

Trying it today and wont forget the black leather gloves or liquid paper on a bee. Thank you sir.

The idea is great I do it to my rig as well only I hook the water muffs up so that I dont pollute the water any more than it already gets. Just a little something to think about.

Okay then, thanks for sharing. Mercury makes a foam cleaning product (can't remember the name) that you spray into the intake that works real well for cleaning.

Seafoam is a great product, I reccomend it with every tank diluted vs the treatment process. Especially when you burn ethanol gas. I've never been a fan of shock treatments for an internal combustion engine and the fuel delivery system. It may even the idle out but its not healthy for the engine long term. I've seen too many engines require major overhauls long before they should who wait and use this product vs maintaining the cleanest system possible.

Here's a tip. The longer you let it sit between treatments the better. Letting it soak, is what really loosens up the carbon in the cylinders. I let mine set overnight between treatments and it ran better than new. Afterwards I pulled the spark plugs and you can see how shiny the tops of the Pistons were. They were they were black with carbon before the treatment

2oz per gallon for a greater cleaning concentration is needed, according to the bottle instructions!

I’ll be honest with you I used Seafoam religiously inmy twin inboard Ford 302 engines with4 barrel Hollie Carburetors on them and with today’s Ethanol it never seemed to make a big difference I just pulled both carbs off every winter and had them completely rebuilt by a local Hollie expert that did most of the areas HotRodders and Dragracing guys Carburetors every season he told me the accelerator pumps were shot ? But after he did his “Magic “ I just bolted onmy Carbs and the boat ran great for the season

I use FTC decarbonizer mixed in with the fuel. Doesn't smoke and restores power after 1 tank of fuel. I run it through all my 4 stroke, 2 stroke and diesel motors. Save a fortune on maintanace. Don't forget an oil change every 12 months.

Marine stable 360 and Maeve mystery oil about 1-2 oz per tank 6 gallons 20 year old outboards some are 24:1 mix

ya I had a piston thru the block,Sea Foam rebulit my engine 5 Stars

Yes this works. However the gunk that comes out the exhaust looks like Hersey's syrup only black. It will put a lot of oily junk in the water. I recommend doing this with water muffs on dry land

stuff worked so good, I even drink it instead of coffee every morning now !!!.. 😅

Theres a product called Ring free..its made for 2stroke outboards and is more potent than Seafoam oz for oz....couple times a season I run properly mixed tank...keeps the carbon build up from happening 💯

My Yamaha 175 Pro V didn't really smoke unless I revved on it..

Can you provide more information on how you connected the other tank... most primer bulbs I’ve seen have crimp connectors, so where do you disconnect it?

Great video thank u… can I do this off a garden hose and muffs?

On an older boat how would you rev without throttling forward? Warm up lever?

My 1987 Suzuki DT65 2 stroke is hard starting (cold) and running slower, but after warming up it starts easy. I'm planning on doing this; any other advice would be appreciated. Thank

i put some water up gas in my truck made it run like well not good .i put seafoam in and ran it for a good while. next day it made all the water in the tank go away. total fix.

Great tips thank you!

Looks very impressive. I have more then 17 years of experience in outboard engines. Carburetor can only be cleaned by hand stripping them open and scraping the gum gunk of and out of the bowl and cleaing jets and small holes with touch fill! Maby EFI SYSTEM. ELECTRONICS FUEL INJECTORS RUN IN FUEL ADDITIVE. BUT IF NOT CLEAN IS ULTRA SONIC BATH AND CLEANING CEMICAL. THE INJECTORS IN SPRAY TEST MACHINE TO MEASURE CC SAME TIME SPRAY TEST CYCLE. THERE IS NO EASY FAST CHEAP WAY IN THIS REAL WORD WE LIVE IN.

Seafoam is great. Wonder what using 90% Seafoam gas and a week or whatever of saturation would do? Thanks for sharing!

If you want to clean all of the fuel ports you need to run it at WOT as well as lower idle speeds

Just for the record you shouldn't rev in neutral more than 2,000 rpms

Naptha or white gas. Same stuff as active Seafoam ingredient but FAR cheaper. $9 a gallon(Coleman White Gas for lantern)

Mine did not like it couldn’t get it leave the dock ran great before beside sitting for 3 years so I decided to poor some of this stuff in I got a bunch of smoke and rough idle wouldn’t stay running after taking it off of fast idle ended up taking it out and pulling some of the fuel out and adding new fuel

Iridium spark plugs is best 😊

I have never had carbon in my carburetor!

Does this product work on 4 strokes as well?

Brandon didnt you do a vlog on grand lake? I thought you did and cant find it.

Does this work for your exhaust? My exhaust is built up with carbon and won't go full rpm because of it and I was wondering if this would fix that so I don't have to take the foot off? Thank you

Can't hurt!

Seafoam has an ethanol stabilizer already in it .

I'm running a 2-Stroke 1990 Mercury 25hp. It runs great on land, bogs down in the water. Do you think this will help? Also if I do choose to do this, do you use a mixture of oil and gas 50:1 like usual? then add a can or no? I feel like it would be different on a 2-Stroke. Thanks ahead for the reply.

Just put Marvel mystery oil in the gas its cheaper and u get more trust me it's just as good if not better than sea foam been using it for idk how long never had and fuel related problems with my 2 stroke merc or any other 2 stroke motor ive used it in

It's in neutral when you letting it run?

Would driving it around and shutting it off for 5 minutes work the same? My controls don’t allow me to rev at idle.

Hey! How do I inject the seafoam directly into the carb? I have a Mercury 4 Stroke

Would sea foam help a motor that starts and runs good when cold or hot but stalls when Luke warm. I’m fighting a 03 Johnson 150 that won’t take throttle when just warm have to feather the hot foot and baby it to get it to take fuel and run but when it heats back up runs perfect.

So after the treatment and you hooked up the regular gas tank again how did it run? Are you happy with the results? Thinking about doing it on my 1981 evinrude 25hp

Can you drive around for 15 minutes or should you just idle?

Sea foam is white gas. It's not very strong. Berrymans 12 will dissolve varnish . in the carbs.

So u use a full can of seafoam WITH premix oil yes together correct?

would this maybe help with low compression if I have a carbon build up?

wondering how bad all that stuff is for that body of water?

so I have 1985 mercury 150hp black max and looks like one cylinder isn't giving out compression. I have changed my spark plug and I'm getting spark on all 6. Can using using this seafood fix the problem? My issue that I have is when I give it throttle and it gets up to speed for about 7-10 seconds it Boggs down and then shuts off? any ideas on what causes that?

My 1965 Johnson outboard bogs down when it's under load. could this be part of the problem the carburetor is dirty and to much carbon buildup.

Cool

Is this going to delute the 2 cycle oil? I got a Mercury 500 series 50hp thunderbolt motor want to clean it but afraid it's going to thin my 2 stroke oil too much. Suggestions?

I don't want to smoke my Neighbors out so I'll go to the lake and smoke out mother nature! Good idea BONEHEAD!!!

Gas can have oil mix for motor?

When you add the seafood to the 1 gallon gas do you mix your oil in the to ?

I use 100% Non-Ethanol Premium Gasoline with 1 fl oz of Seafoam added per gallon of Gasoline for continued maintenance...!

Hello good Sir, Is that a 2 stroke or 4 stroke? Much obliged for any help.

no before or after seafoam photos .. If you over oil it smokes also .. Just cause it smokes doesn't mean its removing carbon from the rings or cylinder head.

Very nice from you getting all that contamination in to the lake , you should do that at home with a big container to keep the carbon and contaminants in control .

Can this technique be used in stern drive/inboard engines?

Does it work for 2 stroke outboards?

where's the fuel filter? I cant find mine.

Berryman’s B-12 Chemtool, IMO actually works better than Sea Foam. Both are good products, but I generally use the Berryman’s over the Sea Foam. It’s whatever is cheaper and readily available at the time is where my loyalties are.