My 10yo Mariner 25hp is hard to start and idles very rough. Runs great at 30-100% throttle. Some have suggested seafoam. How do you apply it? Use it? Thanks.
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My 10yo Mariner 25hp is hard to start and idles very rough. Runs great at 30-100% throttle. Some have suggested seafoam. How do you apply it? Use it? Thanks.
You might be able to clear it up a lot by doing a de-carb. Here are the instructions. Decarbing Your Engine- The Process-HOW AND WHY - iboats Boating Forums
Thank you sir. That was very informative.Quote:
Originally Posted by IBNFSHN
I'm a believer in the stuff.
i am a believer two
I have used it for several years and it is good stuff
Good stuff. I have used it for years too and haven't had engine problems since I started using it.
Thanks guys. I went out this morning with new Champion Marine plugs and it made a world of difference, cranked right up shifted into gear with no bogging but after several stops and starts, it acted "fouled" again. Going to treat with seaform next.
I am a die hard SeaFoam believer too. Good stuff. I use it in all of my 2 stroke motors. Chain saw, weed wacker, leave blower and outboards. (It is good for four strokers too) You will see a HUGE difference in how your engines idle and respond to adding power. They throttle up much better. In addition to keeping the carb clean, it acts as a fuel stabilizer. I also use SeaFoam Deep Creep to keep linkages lubed and clean. If you fog your engine at the end of the season, (I run mine all year) you can use Deep Creep to fog. I think Deep Creep is regular SeaFoam in an aerosol can. Not positive though. You can buy SeaFoam at most auto stores. The best price I have found so far is Tractor Supply. ;) You can buy it in a gallon can there. It is well worth the price. Try it!
One more thing about SeaFoam. Don't over do it. More isn't better. The directions say one ounce per gallon. Stick to that. It will cause your engine to put out white smoke if you over do it.
Also, if you are having idling problems try some premium gas with the SeaFoam. I usually use mid-grade, never just regular and I occasionally will fill up with premium. All of my engines idle very smooth.
On another board--refuge forums boat board--many members don't recommend Sea-Foam to be used with ethanol gasonline. Their reasoning is that Seafoam contains alcohol (which it does) while Sta-bil doesn't. I don't know if that's correct, but I do know ethanol gas is bad for older motors
Thanks Maggies, but I would never knowingly put ethanol in any motor I own.Quote:
Originally Posted by MaggiesMaster
Ok guys. Got the seafoam and deep creek this afternoon at O'Rileys(sp). Going fishing in the morning, will spray the deep creek in the carbs when I get gas and add proper amount of seafoam to gas, then trailer for about 20 min to ramp. Does this sound right?
i use stabil for ethanol gas ,just about all gas you buy now day has ethanol in itQuote:
Originally Posted by majflyboy
That sounds fine
Good post Maggies. I have to admit that I didn’t consider the effects of ethanol. It never crossed my mind. I have been such a strong believer in SeaFoam for so long- I just keep on using it. To me it is a GREAT product.
I did some research and I found this information on the Sea Foam website click here for the whole report. http://www.seafoamsales.com/gas-engi...uels/view.html
Ethanol Fuel & Using Sea Foam Motor Treatment
Sea Foam Motor Treatment is a unique 100% pure petroleum oil product, developed to solve specific problems that are common to gasoline, gas/oil mixed fuels & diesel fuels used in all types and styles of 2 cycle, 4 cycle, diesel and Rotary (Wankel type) engines in common use in all automotive, truck, fleet, industrial, agricultural, specialty industries and small engine applications.
When Sea Foam Motor Treatment is added at 1 ounce per gallon to commonly available 10% & 15 % blended Ethanol fuels as recommended, Sea Foam:
*Adds lubrication for upper cylinders and vital fuel system components
*Dries moisture and works as an anti-gel
*Cleans fuel system residue
*Stabilizes fuel for up to 2 years or more
*Cleans carbon deposits from pistons, heads & valves as the engine is run
Sea Foam has been used in Ethanol fuels (10%, 15% and most recently E-85) successfully since their initial introduction into the marketplace during the 1990’s. As these “New” Ethanol fuels become more widely available nationwide, questions have arisen about the use of Sea Foam Motor Treatment in Ethanol fuels.
Sea Foam Motor Treatment has been performing its engine component cleaning function in gasoline and diesel engines since 1940, and now it performs this same function just as well in Ethanol-blended fuels. An average one ounce Sea Foam per gallon of Fuel is recommended in both gasoline and in 10% & 15% Ethanol blends.
Ethanol fuels differ from standard gasoline in a few aspects, presenting potential issues that can be addressed through the use of Sea Foam Motor Treatment.
1. Ethanol tends to strip engine oil from cylinder walls and can be harsh on exposed surfaces & components that require lubrication. Sea Foam is oil, adding lubrication to upper cylinders that will prolong the life of your engine.
2. Ethanol absorbs moisture which needs to be removed from the Ethanol. Sea Foam dries moisture from fuel.
3. Ethanol leaves deposits which periodically need to be cleaned. Sea Foam is a fuel residue and carbon cleaner.
4. Ethanol deteriorates as fast as non-ethanol fuel, the need to stabilize remains. Sea Foam is the best fuel stabilizer around.
5. Ethanol burns faster, hotter, & makes about 18% less power than gasoline – characteristics that make it less desireable. This tendency to burn faster and hotter increases the risk of damage from pre-ignition and detonation – especially in engines with carbon build-up in their cylinders. Adding Sea Foam slows down the burn rate of Ethanol to levels resembling standard gasoline.
Sea Foam recommends 2 ounces of Sea Foam per gallon of E-85 blended fuel for moisture control and added lubrication because of E-85’s MINIMUM 70% ethanol content. (Minnesota labels E-85 as MINIMUM 70% Ethanol content or more)
By the way, in Middle Tennessee we have gas stations called MAPCO’s. Our local station advertises on their sign that they don’t have Ethanol in their gas. I have also seen the same at a local Citgo station. Finding Ethanol free gas is getting harder and harder.