Oil & Fuel heavy smoke

[SPYDERLK]

It is quite possible that the delivery valve for #3 has stuck open delivering full fuel all the time. Poor compression would not produce large amounts of black smoke.

It would clear up under full load&rpm then?? We dont have that data point. Have to wait for pump dissection I guess.
larry

 

[kuboman]

It would clear up under full load&rpm then?? We dont have that data point. Have to wait for pump dissection I guess.
larry

That does make sense for a stuck delivery valve. It is over fueling that one hole at anything but full load/rpm. Delivery valves are easy to take out and repair.