Re: 1996 spectrum17'pro aventure???????
A decarb is a process by which you remove the accumulated carbon and fuel residue from your engine. Virtually all manufacturers recommend it, its easy, and can be an engine saver. It can keep the rings from sticking, which can keep them from breaking. Rings have to move to fit the tapered walls of the cylinder. If they stick, there is a gap between the ring and the cylinder wall, which causes a loss of compression. Loss of compression on one or more cylinders causes poor firing and excess heat, and a major loss of power.<br />Boom goes the engine.<br /><br />OK, the decarb process:<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 some more for a minute or two, 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 3 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.
wanted to add that you can buy a service manual for 30-40 bucks and do most of the work (if not all) on the powerhead your self. with not a lot of special tools. They are a really straight forward motor.<br /><br />Luck to ya<br /><br />Link