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New Engines
Remember before starting remove one plug per head and revolve engine to push out the inhibiting oil in each cylinder. While cranking (mags off) oil pressure should rise. First few flights should be 1 up with shallow climbs etc. but at full power, keep the airspeed up for better cooling. Remember to check fuel flow and if able to check fuel pressure in the system. Fuel pressure above 3 ½ lb will cause the engine to run over rich by lifting the float valve and flooding the Carby. Auxiliary fuel pump pressure above 3 ½ lb will only cause the engine to run rough. Combined engine pump and boost pump run around 3 lb pressure. When building or fitting a new engine or engine instruments, its well worth checking the calibration of your oil temp probe & gauge by removing the probe, rigging up a temporary earth to the body of the probe and sticking it in a thermos of hot water at a known temperature.
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