sometimes your bound to screw up and get the ignition timing or carb tune not right and that can result in fuel fould plugs that make an engine nearly impossible to get running smoothly or in extreme cases even started, now if the engine starts theres some chance they will burn clean over time but thats not always true and its not a difficult problem to cure in many cases.
your obviously better off too replace the plugs , or of if moneys tight you can use a propane torch to burn off the wet gas & oil film while you hold the plug with an insulated glove then use a sand blaster or wire brush to remove as much deposit residue as you can then re-gap the plugs and re install with anti-seize on the threads.
a blast cabinet and compressor can be used and get better results that a wire brush, but they are not required as careful brush work works most of the time
RELATED INFO IN LINKS AND MUCH MORE IN SUB LINKS
viewtopic.php?f=70&t=202
viewtopic.php?f=55&t=109
viewtopic.php?f=70&t=4683
viewtopic.php?f=70&t=3949
viewtopic.php?f=70&t=5428
http://www.procarcare.com/includes/cont ... Fig12.html
your obviously better off too replace the plugs , or of if moneys tight you can use a propane torch to burn off the wet gas & oil film while you hold the plug with an insulated glove then use a sand blaster or wire brush to remove as much deposit residue as you can then re-gap the plugs and re install with anti-seize on the threads.
a blast cabinet and compressor can be used and get better results that a wire brush, but they are not required as careful brush work works most of the time
RELATED INFO IN LINKS AND MUCH MORE IN SUB LINKS
viewtopic.php?f=70&t=202
viewtopic.php?f=55&t=109
viewtopic.php?f=70&t=4683
viewtopic.php?f=70&t=3949
viewtopic.php?f=70&t=5428
http://www.procarcare.com/includes/cont ... Fig12.html