Am pretty much at my wits end with this generator
I was given it in about 2017. Got it working, but always had issues getting the rpm right at the 3600rpm listed on the spec panel at the front. But it powered an angle grinder, fan and sounded pretty good.
Think it is dated 2004. One of the first of them, they are the common 2 stroke 63cc yamaha knockoff genset sold under a million different names - tailgator, 909, millers falls, chicago electric, firman, mechpro, blackridge, etc
Anyway, put it away in about 2019 and haven’t looked at it since.
Got it out the other day – even though it was stored bone dry I had to clean the carby again. Runs good now.
Dry storage, no mice damage on anything.
The problem is when I got it out of the shed, it had no power. Tried reverse spinning a drill without success. Then it suddenly came slightly good, but very low voltage. Figured capacitor was shot but new one didn’t fix the problem later on
It was about this point I started thinking how can it spin at 3600rpm when every other regular non inverter genset runs 3000rpm (for 50hz).
Someone at GMC obviously forgot to change the label from 60hz USA in the early models.
With a kilowatt meter, I have 240v at 3000rpm, or 265ish at 3600rpm.
It will run a fan or lightbulb fine, but put a 350w jigsaw on it and it immediately drops voltage down to 115ish, then slowly back up to 210v, then begins dropping down to 120 and back and sometimes drops to practically nil.
It does surge when the power is put on (even though the carby is as clean as a whistle), but even holding it at 3000rpm with the jigsaw running does not yield a constant 240v. The jigsaw never sounds ‘right’ like plugging it into mains, and has very slow starting, even with new capacitor.
Has anyone pulled one of these apart?
My theory is it isn’t surging due to a carby issue, but a diode or something changing the load (and output voltage) and loading and unloading the motor and the governor cant keep up .
Thanks
