Hi this is my 3340 I just purchased. Currently chasing a not charging issue and I believe it needs fuel filters as it will run fine for a while then suddenly starting bogging and will die if I don’t feather the throttle. If I let it sit for awhile it will then run just fine. Is there a service manual available for this as I’m trying to figure out where all the filters are and how to change them and what fluids it uses.