Old Fuel

Thankyou for the advice travler, however the motor is BMW D7 (7hp) pushing 4 ton of timber boat, and I can not get parts here, the stuffing box is brass and crumbling.
it all needs updating so we bought a longpower D20 (20hp) with gearbox brand new for $800- (+shipping) with 12 months warranty.
its not really worth playing around with the old engine at that price.
if you know anyone who wants the old BMW engine for parts or to repair your welcome to it.

If the engine you're taking out is only 20 hp.......how big is the fuel tank of contaminated fuel that we're talking about here?

the fuel tank in it for the bmw 7hp is only 25ltr.
the new engine (20hp) uses 1.2ltr per hour.
were not talking big tanks like most people on this forum.

I would just drain that size tank completely and let it air dry and whatever remnants in it evaporate. This should kill any algae and remove any water that is present in the tank. Clean the inside walls if you can access them through the sender or fill, then fill with clean/fresh diesel and diesel kleen-bio kleen additive......

Yep.. exactly what I did
no more white smoke