If you don't already have one, get a manual in PDF form. If you google the model # you can find all the manuals on line for free. I have the same NHE generator as you. When I cleaned up mine I pulled it out of compartment
And reinstalled it on rails. What's wrong with the spark plug wire? Is it broken or is the boot bad? As I recall the wire is part of the coil. I'll check to see if I have any manuals on file. Send me a private message or get me your email. The GenSet is over 300 lbs, so you have to unbolt it and drop it down. The tight fit in the compartment won't let you work on much the GenSet. That's why I put mine on rails.
2008 Newmar Essex 4515
2014 Honda CRV & 1980 Jeep CJ7
Owner: RVProPlus- RV/Inspection/Repair