Yamaha 2000 problems

Thank you everyone who responded , bring you up to date. I will try to answer some of the guestions . I checked both generators one at a time where the dual connection hooks up at the generator , one showed 125.4 and the other one showed 124.8. So both are producing at the out put terminals. I then used ohms meter on the dual harness. It showed fine. I then started both generators at high rpm then turned on the AC. One of the two generators went to yet a higher rpm the other one stayed at the regular hi rpm. The AC did nothing. I tried this a few times with the same result. To answer the soft start cap I don't have the one mentioned. I know I can hook up my Honda Eu 3000 and it starts with no problem. I have Yamahas tech number that I plan on calling tomorrow . As to the soft start cap that was mentioned being able to run on one generator did you do the install yourself ? If so how complicated was it to do? Thank you to everyone for there input. This site is so helpful to everyone . I am a certified welder with 37 years in the trade. If I can help anyone in the welding questions please let me know. It's the most I can offer to help pay my way here in helping others. Thanks again.