decarboning

[johndezman]

have seen several posts discussing the procedure of decarboning. all well and good.<br /><br />what are the benefits gained from the process? i would expect greater longevity, but is there any other tactile improvement? better idle, better starting more power etc?

 

[MITCH WELCH]

Re: decarboning

John, pretty much - all the above. The biggest benifit is to keep from blowing your engine. A good rule of thumb is to decarb. yearly. A healthy engine is a running engine. I'm no expert, but that's my opinion.

 

[12Footer]

Re: decarboning

Mitch is right on.

 

[johndezman]

Re: decarboning

can anyone guess at % of improvements ie will you get back 10-15-20-25%

 

[petryshyn]

Re: decarboning

I guess that would depend on how badly carboned up it is now. Just pulled my engine down and found two cylinders carboned up. One cylinder wall is just starting to score from carbon. I'm lucky this time...I think I'll decarbon a little more often after learning this lesson, how about you?....LOL. Don't wait till its a 'shoulda coulda woulda'. The rings were seized as well from the carbon build-up. (probably contribute to rough idle and hard starting)<br />

 

[John from Madison CT]

Re: decarboning

From what a Yamaha dealer told me...you can't Over-decarbon. A V6 outboard can use 2 cans of the Decarb. spray.<br /><br />I was also told to let it sit overnight, not the 15 minutes it says on the can. Decarbon once with one can...blow it out by running the engine either in the water or on fast idle on ear muffs, then use another can one more time..again waiting hours to let it soak. Save a little each time to put in the spark plug holes too after you initially stop the engine.<br /><br />John

 

[suzukidave]

Re: decarboning

I don't know about the long soak. I thought the flip side of decarbonizers and one reason there's a debate is that they don't just eat the carbon if you leave it in too long.

 

[btmoyers]

Re: decarboning

Just my .02. I bought a can of OMC Engine Tuner p/n 771297. They are saying to leave in 3 to 16 hours after spraying entire can and stalling engine...That's kind of a wide variance!?!?....Bill

 

[sony2001]

Re: decarboning

To be successful we want to clean up the rings around the pistons for compression and to prevent them from breaking on a piece of carbon buildup. When I have the chance I spray thru the plug hole to the top of the piston and imagine the liquid running down, covering the complete rings. On warm engines or overnight should help. Doing it thru the carbs should get the other side of the rings.

 

[jm]

Re: decarboning

I have a 1963 Johnson 40HP that probably has not had any preventitive maitnance work done on it in several years. Would decarbing my motor be somthing I should look into? Can someone post the exact procedure for doing this? I am new to boat motors but am learning quickly. Just replaced the waterpump last week. Any other maitnance ideas would be great!

 

[Fouled Plug]

Re: decarboning

Easiest way? Buy a product called Seafoam at your local auto parts place or go to a Yamaha dealer and get Ring Free. Both are added to the fuel tank, and run through the motor. Higher concentration for initial treatment, then lower amounts to keep gunk away. Does it get any easier?