Just to let you know, I'm a brand new member. I have a 1996 Damon Intruder with a Generac NP-66G with about 650 hours on it. The coach has dual A/C: a 13500 BTU in the front and a 11000 BTU in the back... I think. The generator will start the front A/C and will match the load. But if I try to start the back A/C; the generator will almost stall, but come back up to RPM. It will run both A/C's for a minute, but the generator keeps dropping off, like it wants to stall and then coming back up. I end up turning the rear A/C off, because the power dropping obviously isn't good for the compressors. I have everything else off in the coach. The lights, the fridge, everything. That generator should be able to power that whole coach, let alone 2 A/C's.
The generator hasn't had any maintenance, other than an oil change now and again. No plugs, no nothing. Is lack of maintenance the problem? If I do the basic maintenance: change the plugs, air filter, oil; will that cure it? Or do I need to take it in and get it looked at? I need to get it fixed, was hotter than hell over the weekend, and I couldn't turn both the A/C's on. That REALLY pisses me off. Any input would be greatly appreciated. Thanks.