A little black smoke out of a mechanical, naturally asperated diesel is normal.
If it starts easy, and isn't losing fluids, isn't smoking white or blue, it's fine. Don't waste your money.
Sad that they don't teach people how to diagnose without a scan tool anymore. Even on a computer controlled engine I'll get halfway to the problem before ever plugging one in.
I want to make another comment too.....
You guys who turbocharge these things. Don't get me wrong, it's cool. It looks cool, it sounds cool..... but I have yet to see anyone do it and it MATTER. All the diesels are hydro tractors. You ever kill or completely power out your hydrostatic drive diesel tractor with just the hydro? Have you ever pulled something so hard, it killed the motor? I can't say that I ever pulled something so hard it killed the motor on any of my hydro drive Cubs. None of them. It spins out before it kills the engine. Adding a turbo to that engine would only every make any different if you are still mowing with it, or using some kind of PTO driver implement, like the mower, or snowblower. Even a rear driven PTO implement. If all you do is push a front blade, or pull a moldboard plow, all you would add a turbo for is to hear it whine... because it will. Oh sure, it may give you a little boost, but on a hydro, there is no gain. On a gear drive machine, there is gain. It's not like the hydro gains anything when more torque is applied to the input. The hydro is not capable of making more torque.
I'm sure this is a wasted rant..... I don't know that many guys who turbo these tractors are doing it to gain power. I think it's just the wow factor.
I'd like the have a turbocharged D600.... In a gear drive.
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