if memory serves me correct the 73531 is the original model that had a breaker and no 12v outlet. the 36 had the breaker removed and had the software modified to increase the load time before it tripped giving a little more surge power......there is also a 37 and 38 model ...there was the original yellow with silver legs which was the 31, the yellow with the black legs which was the 36 and of course the all red costco version, the grey northern tool version, and an all black version with the usb power outputs......they are all internally the same, but i think there was some variation in ratings based on the circuit rating....some were 1600/2000 and some were 1700/2000......of course the lower number was only for like 8 minutes and the surge rating was for like a second...that is the only real difference compared to a honda....it will run its lower rating for like 30 min......
on another note, i picked up a 6 gal marine tank and im gonna see how it fares as an aux tank and ill let ya know!
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2015 F350 Platinum Fx4 6.7 Diesel Dually. B&W turnover, B&W Companion, air bags and wireless controller.
2015 Heartland Road Warrior 420 Rt
2012 f250 Fx4 6.7 Diesel crew cab tinted n tuned
2012 lacrosse 318bhs touring- sold
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