DieselBound
Elite Member
I had an issue (quite similar) with my B7800. I was really busy at the time and didn't have time to really look into it. A neighbor wanted to use it and another neighbor volunteered to trouble-shoot it. Once I was freed of my other distractions, after the one neighbor was unsuccessful in his diagnosis, I rolled my sleeves up... A fuse that I'd looked at and looked fine turned out to be, using, drum roll, a proper diagnostic tool (and ohm meter), in fact, bad. This is the only time that I've ever encountered a visually OK-looking fuse to be bad. Many a time a person can bruise their forehead on low-hanging fruit!
Also, electrical connections can readily become corroded (in ways that it's almost impossible to detect w/o intense diagnostics or methodically pulling things apart and checking [but keep in mind that what looks fine isn't always FINE <- refer to my above fuse story]). Had this occur on a generator. Generator is an older unit that I had done a lot on to get it reliable, and then one day it wouldn't spin the starter (prior to this event I'd even pulled that starter and cleaned and lubed it!). There's a lot of electrical stuff going on with generators. One can find oneself staring at a lot of intimidating looking stuff. Armed with a schematic and with some help from an online forum (SmokeStak.com is an excellent source for older engines and such!) I tracked down the problem to a poor connection on a relay. Went through all the connections I could and now it's all good; it's something that I should have done from the get-go, after first getting the generator. Just plain good advice for when getting ANY piece of used equipment: sigh, and for even NEW stuff (a new flail tried to self-destruct when an under-torqued bolt came loose).
Also, electrical connections can readily become corroded (in ways that it's almost impossible to detect w/o intense diagnostics or methodically pulling things apart and checking [but keep in mind that what looks fine isn't always FINE <- refer to my above fuse story]). Had this occur on a generator. Generator is an older unit that I had done a lot on to get it reliable, and then one day it wouldn't spin the starter (prior to this event I'd even pulled that starter and cleaned and lubed it!). There's a lot of electrical stuff going on with generators. One can find oneself staring at a lot of intimidating looking stuff. Armed with a schematic and with some help from an online forum (SmokeStak.com is an excellent source for older engines and such!) I tracked down the problem to a poor connection on a relay. Went through all the connections I could and now it's all good; it's something that I should have done from the get-go, after first getting the generator. Just plain good advice for when getting ANY piece of used equipment: sigh, and for even NEW stuff (a new flail tried to self-destruct when an under-torqued bolt came loose).
You'll need to change oil, filters,flush system and get additives in everything on the place before it spread's farthar. 
that tip really should save people time and frusteration with no crank and no start situations but a few might welcome clearification on first two sentences and a little more detail on how to go about preforming the test.