Yeah the GB 40 doesn’t have enough juice for the 200. Need to step up to the GB 70 or higher to have the proper amount of juice for a 200. After seeing so many of these portable jumpers now I do think there are other great options than Noco but at the time I bought mine they seemed to be the main option that got solid reviews. I am sure now there are other great options in the market. Important to check and make sure the jumper you pick is the appropriate size for your rig. Have a Honda and I can get away with using a cheaper Stanley jumper I got for free.I've got the GB40 and I am not to impressed by it for the large Cruiser engines. It couldn't reliably start my 80 when the battery was totally dead. Last week it couldn't start my 200, even though it could detect the batteries. Luckily my 80 and my 200 have dual batteries so I just jump off the aux battery every time.