Comfort Pro Apu Issues (solved)

No they seem about the same. I have the same 3 cyl in my kubota tractor that's 20 years old it's been a real workhorse.

The difference between the two cylinder and three cylinder kubota diesel motors is very substantial in terms of vibration and noise. The 3cyl is a far better motor overall , so much smoother and quieter.

Matter of fact I'm replacing the glow plugs on the Carrier APU today. First set and it's still on the original Serpentine belt at 5300 hours, which still looks find but for $25 , it's getting changed as well.