Black Smoke at start up and under load

[timb]

From everything I've been able to find out - with decent maintenance a typical Yanmar should only being feeling it's oats at 2000 hours.

Back when I bought mine there was a 4500 in the shop - split and torn down for a drivetrain rebuild. Seems like the owner started having trouble getting it out of 4wd and ended up leaving it in all the time - with considerable hard pavement travel. Something eventually gave out in the driveline but the engine was still solid and strong. It was obvious this 4500 had not been babied - and it had 5500 hours on the clock.

The bigger question may be what had been done for/to your particular 4100 before you got it, but if it's been maintained reasonably to the schedule - and you continue the same care - you'll likely be good for a very long time.

 

[uptaker73]

I have a 2 cyl diesel in my JD 650 4wd. When it starts to get under a load it will start to puff a little gray smoke. Does this mean there is a problem. It does not lack for power or seem to miss a beat. Just curious. I just give it a little more fuel and she clears right up. Only has 531hrs.