BUKH DV marine engines have very little vibiration. Dynamic balancing by means of an advanced system of rotating counter-weights takes care of damping the movements of pistons and connecting rods which would otherwise make the engine vibrate. A BUKH does not rattle, smoke, or produce nasty fumes. Automatic fuel control ensures precise amounts of fuel are fed to the engine under any conditions. This prevents the formation of smoke and soot and keeps the R.P.M. constant at varying loads. An automatic timing device prevents ignition noise at low revolutions.