Guest Posted November 8, 2015 Report Posted November 8, 2015 9 hours ago, Tommy said: Thanks guys! Just to a couple of more questions! 1) What fuel burn rate would you plan when running full throttle at say 2000' or below? 2) how often to do change the prop setting during the break-in flights and how long do you leave it at a certain rpm? And How low do you go to? Cheers Tommy, Here is the portion you need: At cruise altitude, decrease power to approximately 75% and continue flight for 2 hours. For the second hour, do power settings alternating between 65% and 75% power as per the applicable POH. NOTE For correct piston ring seating, in a top overhauled engine or a newly overhauled engine, operate the aircraft at 65% to 75% cruise power until oil consumption is stable. For a normally aspirated (nonturbocharged) engine, it will be necessary to operate at cruise power at the lower altitudes. Density altitude in excess of 8,000 feet (2438 m) will prevent the engine from reaching sufficient cruise power for an acceptable breakin; 5,000 feet (1524 m) is recommended
RobertGary1 Posted November 12, 2015 Report Posted November 12, 2015 On 11/5/2015, 4:08:26, M20Doc said: Ross, I can can not agree with cranking the engine to establish oil pressure, the fastest way to destroy a camshaft possible. The engine should be lubricated using an external pressure pot connected to the oil gallery on the front right side of the engine behind the starter ring gear. Clarence Yes, but its right out of the Lycoming procedure. -Robert
Guest Posted November 12, 2015 Report Posted November 12, 2015 58 minutes ago, RobertGary1 said: Yes, but its right out of the Lycoming procedure. -Robert Coincidentally, Lycoming sells camshafts and lifters. I wonder how many are damaged be they ever get started? Clarence
RobertGary1 Posted November 12, 2015 Report Posted November 12, 2015 Just now, M20Doc said: Coincidentally, Lycoming sells camshafts and lifters. I wonder how many are damaged be they ever get started? Clarence :) Possibly. It is how to primed my new Lycoming. The engine was already run at the factory so there should be residual oil on the cams though. -Robert
Bartman Posted June 20, 2020 Report Posted June 20, 2020 Data point for an old thread. I considered cranking with the plugs removed, but comments from our @M20Doc Clarence changed my mind. Yesterday we removed the plug on the upper right front and filled the entire 8 quarts via the right side oil galley and it took several hours at low pressure. This morning I loosened the fuel lines and engaged the boost pump to clear the air out of the fuel lines. Afterwards we started the engine and she came to life in about 8-10 seconds, and oil pressure came up within 5-6 seconds of starting.
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