For the 1973 C-150L manual that I have, the markings for the O-200-A are: Oil Pressure: Minimum Idling 10 psi (red line) Normal Operating Range 30 - 60 psi (green arc) Maximum 100 psi (red line)
Oil Temperature Gage: Normal Operating Range Green Arc (that's all it says, honest) Maximum Allowable 240 degrees F (red line) Fuel Quantity Indicators: Empty E (red line) Tachometer: Normal Operating Range: At sea level 2000 - 2550 RPM (inner green arc) At 5000 feet 2000 - 2650 RPM (middle green arc) At 10,000 feet 2000 - 2750 RPM (outer green arc) Maximum Allowable 2750 RPM (red line) Suction Gage (Gyro System): Normal Operating Range 4.6 - 5.4 in. Hg (green arc) There are also several airspeed markings, but I assume that those would not apply for your usage. Allen G. Wiesner KR-2SS/TD S/N 1118 65 Franklin Street Ansonia, CT 06401-1240 (203) 732-0508 flash...@usadatanet.net
