I used to have to put a wrench on the end of the Generator and turn it a half to a full turn to loosen stuff up to get it to turn over.
Last year I noticed a rattle when starting so I pulled the entire generator out and yanked the cover. I found the bushing on the end of the starter motor as well as the gear were worn and slopping.
I replaced the starter motor and she runs fine now.
I removed the generator with a floor jack (with wheels) and some plywood.
I did the deed outside in the back 40 so I was able to dig a wide trench under the rig to allow the unit to clear the skirting.
It was a full day job but worth it.
While the unit was out I cleaned everything, serviced the unit, painted all the metal with rust converting paint and then a nice top coat.
It was a lot easier to work on the unit while it was out of the RV.
My unit was over ten years old when I did this. Now it fires up right away every time just like when it was new.
It was a lot of work but well worht it.