Although the Yammy 2400 is a great generator, it's capacity (2400 watts on surge only) does not guarantee that it will start every AC. It will start most, as these good folks will attest, but not all. It is just too small.
Although you've gotten plenty of helpful expertise, in a situation where your generator won't start your AC, why have none of them thought of blaming your generator? To me, blaming your AC--or your TT--seems backwards and silly. Of course, I'm new to RVing, so maybe there's some reason we're supposed to blame the trailer.
For my money, I would not thrash around with a soft start capacitor,and I would definitely not consider trading out my AC. Rather, I would tow my TT to the nearest Shucks/Kragen/Parts America (whichever is in your region), and ask them to demonstrate that the Champion 3500 (4000 watts surge) will start your AC. If it doesn't, you can buy the soft start capacitor instead, and worry about getting it installed in time for your trip to Yosemite.
For $299 you can solve this crisis in time to hit Yosemite. Or you can try to book shop time to get your capacitor installed, when there's no guarantee that it will be sufficient.
Wise sales has a great reputation, and so does the Yamaha 2400. If it was me, I would put these fine reputations to the test, and ask them to take back the generator that wasn't up to the task.
Granted, it's on the lower limit, but I like the size and the low noise rating. If I can make this one work for me, it's perfect in every other aspect. If the Yamaha 2400 will not cut it, I will go without as I have no room to store a 3000 and it's too heavy to be convenient.
I tried the sequential start, and it did work, all the lights off as before but the converter still on. Once the AC was running, I'd guess it to be about 1/3-1/2 throttle. Then I turned on the lights so I could dink around a little bit. I didn't have the thermostat set real low so it cycled off and tried to come on again later but stalled. Repeating the sequential start worked again. However, I'm at 1200 ft and 78 degrees currently, what about when it's 90 in Yellowstone or the Tetons, ie. 6000 ft??
"what about when it's 90 in Yellowstone or the Tetons, ie. 6000 ft?? "
If your Yamaha is marginal at 1200 feet and 70 deg, I guarantee it will not work for you at 6000 feet and 90 deg. 6000 feet at 90 deg is more like a density altitude of 10,200 feet. All motors are derated several percentage points for each 1000 feet in elevation. I forget the derate amount but i am looking for it. It may be in your manual.
2004 F350 PSD FX4 SB CC, Banks Cold Air Intake
18,000 Superglide
2003 37SP Forest River Sierra Toyhauler
2008 Polaris RZR
It is about 3% of your HP for every 1000 feet altitude increase so you are down about 30% of your HP because your generator is rated at sea level on a standard 60 degree day at 29.92 INHG barometric pressure.
ckelly - I was in the same boat you were in. I have a Coleman Mach III and figured with a 2400 I'd have plenty of power to spare. NOT
I felt the same way you did. I finally purchased a supco SPP6E "hard start" kit. It took me 45 minutes to get my cover off safely without damaging it, and 10 minutes to install the unit, and it worked. The 2400 revs up just a smidge and it just purrs. It took me another 10 minutes to mount the unit inside the wiring closet and button up the top.
All in all it was 1:05 job.
Arnold Service is highly recommended on the board and inexpensive. I needed mine to work and quickly. I went to the Supco website, found distributors, called one locally and they had it in stock. I've been golden ever since.
If you have any other questions, send me a private message!
weissmand wrote: ckelly - I was in the same boat you were in. I have a Coleman Mach III and figured with a 2400 I'd have plenty of power to spare. NOT
I felt the same way you did. I finally purchased a supco SPP6E "hard start" kit. It took me 45 minutes to get my cover off safely without damaging it, and 10 minutes to install the unit, and it worked. The 2400 revs up just a smidge and it just purrs. It took me another 10 minutes to mount the unit inside the wiring closet and button up the top.
All in all it was 1:05 job.
Arnold Service is highly recommended on the board and inexpensive. I needed mine to work and quickly. I went to the Supco website, found distributors, called one locally and they had it in stock. I've been golden ever since.
If you have any other questions, send me a private message!
good luck.
josh
If you need more help, send me a PM.
Another vote for the Supco hard start , worked on my Carrier 13500.
Sometimes the yamaha will not ramp up the rpm fast enough to start ac , but seems to get better as the new Gen and ac unit break in.
Ran mine for a test about 6 hours in 2 days 90 out - failed to start 2 times and used almost a tank of fuel.
ckelly wrote: Okay, I'm about to do a little panic dance here. I just bought a new Yamaha EF2400is generator from Wise Equipment and tried hooking it up to the '07 Jayco 27BH w/Coleman Mach 3 Plus 13.5 AC unit. When I kick on the AC, nothing else on except the converter w/fully charged batteries, the little Yamaha goes to full throttle the AC unit sorta hums but won't start and finally the overload trips on the generator.
Sooo, now what? Do I have a $1100 generator I can't use??? OMG
The specs for the Mach 3 state 10.9 A for the compressor, and 3.4 A for the blower on High (I was on low, or 2.4 A) for a total wattage of 14.3A x 115V = 1644.5 W
Ideas??? HELLLLLPPP!!
We own the Mach 3 PS (which draws 10.5 amps) in conjunction with the Yammy EF2400is. For my situation I must let the Yammy run at least 5 minutes, with no load, prior to this sequence: AC fan only...Yammy throttle up...then full demand from the Coleman.
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