It is going to be two weeks before I can get the engine on the bench to try out, I have a 5% Castor/Synth blend which I have used for running in motors in the past, I will start of with this and see how it goes.<div>My tank is around 250mm away from the engine, as mentioned before I cant move it closer.  So I think I will tap the backplate of the motor, have a non return to presurise the tank and a cline to regulate it prior to the stock carb.  My other option is I have an old YS vibration pump which can be installed but requires a return line to the tank.</div><div>To many options - not enough time .....</div>