Sea Foam Deep Creep Users

[bergsofafeather]

First let me say that I have done a search and read a ton...that IS why I am confused Background: I have a 85hp 1975 Mercury, haven't done much to it other than change some plugs and spring tune up two years ago, seems to run pretty **** strong still, although I backed out both carbs needle seats 1/2 turn (they were at 1-1/2) to get it to idle at start up when reducing the cold start lever. My question(s) is this...the directions on the can state "with engine warm... (#1- I don't have a temp gauge, so 5 minutes? 10?), ...keep on high idle (#2-just leave in neutral and put the cold start up? I don't have a tach)...and spray....when engine is loaded up... (#3- when it's about to die from spraying so much in? a little smoke? a lot?) turn off ignition. Restart the engine after 5 minutes." (5? I've read about some of you leaving it in all night and blowing it out on the lake the next morning?)Thanks in advance.

 

[bergsofafeather]

Re: Sea Foam Deep Creep Users

 

[roscoe]

Re: Sea Foam Deep Creep Users

?1, yes<br />?2, yes<br /><br />I always let it sit 2 to 6 hours.<br />*******************************************<br /> Your intent is REMOVE the existing carbon buildup from the cylinders, heads, and rings, a spray decarb solvent product, such as SeaFoam Deep Creep, is needed. Some people use one can per cylinder.<br /><br />Run engine at fast idle, with engine running, slowly spray liberal amount into each carb, its gonna smoke up the place,<br />spray for a couple minutes, now spray a larger amount into carbs until engine chokes out and stops,<br />remove spark plugs and spray decarb liberally into each cylinder, install the spark plugs, let it soak for 2 to 10 hours. <br />Start the engine and run at medium throttle, or if at the lake, run it at full throttle. It won't hurt to spray some more through the carbs. Run it for atleast 10 minutes to flush the crud out of your engine. Now remove and clean, or replace the spark plugs. <br /><br />It works well to do the spraying, the night before you go to the lake. This way you can let it soak overnight, and really flush it out at the lake.<br /><br />Don't do this in front of the garage door or the house, unless you want it coated with greasy crud.

 

[Kenny Bush]

Re: Sea Foam Deep Creep Users

Yes as Roscoe said, and also I put a can of SeaFoam engine tune in my gas tank, so I get a continuous decarb through the whole tank. If you have never decarbed, do each cylinder overnight as Roscoe said. Then keep it clean with SeaFoam in the tank about every 3 tank.

 

[gss036]

Re: Sea Foam Deep Creep Users

I copied this from another board some time ago and have used it for the past 2-3 years, works just great. I use my Honda 3 gallon tank since the Mercury and Honda have the same fitting at the engine plug-in. I have 1989 200 HP mercury.<br />Tip for the Week <br />Do-It-Yourself Engine Tip; A Simple and Cost Effective Way to De-Carbon an Outboard <br />By Capt. Bob Dunkelberger dunk75@comcast.net <br />This works for Carbed, EFI, Ficht, HPDI, Opti-max and even 4-strokes... and should be administered after every 50-60 hours of use. <br />First you need a separate small fuel tank. One of those 3-gallon red Tempos works well or an empty gallon milk jug in a pinch, but it might be a bit messier. <br />I use Seafoam over the OEM (original equipment manufacturer) stuff like OMC Engine Tuner or Mercury Power Tune. Note: in the last few years they changed the formula and you have to let them sit up 12 hours. Who's got time for that? Seafoam does the job in 15 minutes and can be purchased from NAPA, Car Quest or other auto stores. <br />You'll need 3/4 gallon of gasoline and one 16oz can of Seafoam for each engine. Don't forget to add 3oz of oil if you are pre-mixing in a carbed engine. Use a 3 ft piece of fuel hose off the small tank. Connect this tank to your engine by pulling off the main tank fuel hose from the intake side of your water separating fuel filter and plug the hose off the small tank onto that fitting. Or you can separate the fuel line on the tank side primer ball, so you can still use your primer. If your engine has a fuel plug then you will also need a fuel plug on the smaller tank's hose. <br />Start the engine, let it warm up and start pulling the mix into the engine. You may have to increase the idle to keep it running once she gets loaded with the Seafoam. Run the engine 15 minutes at the dock or just cruising around under 2500 rpm's. Then shut it down and let it sit for another 15 minutes. <br />Restart the engine; the smoke you see is the carbon burning off. Do the whole thing again and let her sit again for 15 more minutes. If she smokes after the second time do it again. <br />I've never seen one still smoke after three doses. (I bought a Bronco two years ago that had 95,000 miles on it. When I used Seafoam on it I had the neighbors hanging out of their front doors looking for where the fire was after I started it the first time there so much smoke) <br />The gallon mix should be just enough to do this 3 times. You don't need a wide-open throttle and you don't need to change the plugs. The plugs are cleaned at the same time as the combustion chambers. My suggestion is that every 50-60hrs is the optimal time to change plugs in most engines. <br />I cleaned an antique Evinrude once that had a 1/4" of solid carbon on the exhaust chamber walls by running a 1/2 gal of the aforementioned mix through it. Seafoam, a great product, has been around since the 1930's and it's what they used when they were burning straight 4 stroke 40SAE oils in outboards. <br />For you guys with the 4 stroke outboards? Those engines work 10 times as hard as any auto engine ever will and they too will carbon up. Too many are under the assumption that it's totally the 2 stroke oil that causes the carbon, Wrong... it's also the additives they put in the fuels today. The carbon inhibitors in 2-stroke oil are there for this reason also. Remember when gasoline used to smell like gasoline, today it smells more like bad cologne. <br />For those guys that like to work the carbon treatment by spraying it down the carbs, Seafoam also comes in spray can called Deep Creep. It's the same stuff under pressure and notes on the can, "Oxygen Sensor Safe". After that, if your engine manufacturer recommends a daily additive treatment then do so. The tank and hose are a one-time purchase and the Seafoam is only costs $5-6.00 per can. <br />Note: Capt Bob Dunkelberger is a Marine Surveyor in New Jersey. Please feel free to contact him at dunk75@comcast.net with any questions.