Re: 96' 3.0L Merc. carb question
James:<br /><br />Put your plugs back in, put water to the outdrive (lake or muffs, either way), and remove the flame arrestor from the carb. Start the motor, rev to 1500-2000 rpm, and slowly pour or use a syringe to squirt water down the carburetor throat, pausing whenever the rpm begin to drop. Pass about a quart of water through the carb in this fashion, at varying rpms if you like. Once you've finished, stop the motor, pull the plugs and check them; they should be much cleaner - the coffee brown we strive to maintain. Congratulations! - you've not only cleaned your plugs, you've also decarbonized your pistons and much of the combustion chamber and valve surfaces.<br /><br />Make sure you take the time now to adjust your carburetor settings (lean it out, dude) in order to remedy the situation that caused the carbon build-up to begin with.<br /><br />Happy boating!
