Engine Decarbing???

[xwwh587]

How many of you have decarbed your outboard using the method discussed in the Engine FAQ forum? If so how did it help your motor? I am pretty sure that mine has never been though this proceedure, but has always had the fuel conditioned if it has going to sit for any period of time.

Thanks, Mike

 

[HighTrim]

Re: Engine Decarbing???

It is known to free up rings and increase compression in some cases.

 

[Silvertip]

Re: Engine Decarbing???

Treating the fuel with fuel conditions is just that -- you prevent the fuel from varnishing. Decar (decarboning) removes carbon build-up within the engine. Fuel treatment (except for SeaFoam and others like it) do not do that. I do my personal boat yearly.

 

[OptsyEagle]

Re: Engine Decarbing???

I did the procedure herein and I've also used OMC engine tuner sprayed through the carb. I can't say for sure that my motor runs better, but I am doing it so that it won't run worse (or better put, not run at all. Stuck rings is not a good thing). It is not expensive stuff and I have had no adverse affects.

I now add seafoam to every tank of gas so I doubt I will need to do this decarb every year. I will probably do it every 2nd season or so. Haven't really decided. I am banking on the seafoam keeping my cylinders from getting worse, while I decide.

 

[iwombat]

Re: Engine Decarbing???

I do the trolling motors every 50hours. The main motor once every season. I notice a big difference on the kickers.

 

[xwwh587]

Re: Engine Decarbing???

I did the procedure herein and I've also used OMC engine tuner sprayed through the carb. I can't say for sure that my motor runs better, but I am doing it so that it won't run worse (or better put, not run at all. Stuck rings is not a good thing). It is not expensive stuff and I have had no adverse affects.

I now add seafoam to every tank of gas so I doubt I will need to do this decarb every year. I will probably do it every 2nd season or so. Haven't really decided. I am banking on the seafoam keeping my cylinders from getting worse, while I decide.

I will probably use the OMC engine tuner. I am guessing that it will tell you how to use it on the can, but, do you just directly spray it into the carbs while running the boat?

 

[munro_capri]

Re: Engine Decarbing???

I did my 1974 85 hp rude, probalbly the first time it had ever been done, and it made a significant difference, I used the deep creep method and put some in the tank. You should have seen the smoke coming out the first few times.
Motor is more responsive, idles better, top end about is the same.
I'll do mine once a year from now on.

 

[ezeke]

Re: Engine Decarbing???

edit

 

[xwwh587]

Re: Engine Decarbing???

I just put new plugs in last week, do I need to put the old plugs back in then the news ones afterwards? The old plugs ran fine, just thought I needed new ones.

Thanks guys, looks like I'll be smoking up the lake this weekend.

 

[OptsyEagle]

Re: Engine Decarbing???

You might as well use the old plugs for the decarb. They say it can damage the plugs. I have not had a problem with my plugs afterwards, but I suppose if your motor had a lot of carbon coming off, it could accelerate the fouling of them.

The OMC engine tuner is to be sprayed right into the carburetor. The instuctions are on the can. Good luck.

 

[GlasV162]

Re: Engine Decarbing???

I just did a decarb on mine. What a difference!! I used the method of mixing a can with 3/4 gal of gas and 3oz. of oil. Lots of blue smoke but afterward my motor (1990 90 hp Evinrude) runs and starts better--idles smoother, and I gained a few mph on top end too. I'm sold on Seafoam!!