I have a 05 Sportster SCIC...I went to change the NGK spark plugs but the ones in my boat have "threads" and everything I see do not..Can someone enlighten me on this!
if you are talking about the top of the spark plug then you should be fine. mine are like that and i think most are on seadoo. make sure you buy the plugs with the threads. when i bought mine they carried with and without threads.
On the NGK plugs there are two types with or without threads even though they have the same number, the top of the plug does not unscrew make sure you buy the right ones.
