Exhaust smoking B7100

[Ricklesss]

Howdy folks!
I recently inherited a 1980 B7100 from a dear friend who passed.
It only has 1,300 hours on it, although the engine oil changes were long and sporadic.
It starts and runs very well, and other than the horizontal muffler that causes me to drive through the smoke, I enjoy driving it. (will make it vertical)
But it smokes a lot when given throttle, though not too visible at idle.
Black smoke, not white, it does not overheat.
How do I determine what the cause is?
Hoping valve seals?
Thank you very much for any advice!
Rick in Oregon

 

[Russell King]

Search for something like diesel exhaust smoke colors. Black is indicating that you may be over fueling. Also that it happens when you throttle up the engine indicates a fuel issue.

I would try a few things to see if you can improve the situation before throwing any parts at it. I would drain the old fuel out or just burn the fuel by using the tractor. Then add fresh fuel and some type of injector cleaner to the tank and run it doing some hard work with the engine (plowing, mowing heavy grass…) and see if it improves.

If no improvement then get new injectors and sealing washers from the dealer or have yours rebuilt. Replace the injectors and while doing that test the compression of all cylinders. You will need to bleed the injector lines afterwards.

 

[85Hokie]

Im with Russell - run it up in the higher RPM range - and work the machine, work it hard , a diesel lasts MUCH longer when it is run like it was designed to do.