I need to changeout a spark plug and solenoid. My engine tech manual is sparse on info in this area. I assume I need to remove the fiberglass body shroud. How do I do this? Looks like there might be two nuts in the back, hidden away up under the shroud lip, and hopefully two in the front. Another question is how do I get the knobs on the levers off to complete shroud removal? I'm not sure how they're kept on there. Mine don't want to come of by tugging and wiggling. Do they slip off? If so, I just need to get mean with 'em.