Continental C-125, C-145, O-300 Series Aircraft Engine Overhaul Manual
Complete overhaul and maintenance procedures for Continental C-125, C-145, and O-300 series aircraft engines. Includes detailed service instructions, specifications, carburetor and ignition system maintenance. FAA-approved Form X30013, August 1977.
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Continental Models Covered & Key Technical Specifications
Models: Continental C-125, C-145, O-300-A, O-300-B, O-300-C, O-300-D, O-300-E
Sub-models / Variants: 6-cylinder, dampened crankshaft (indicated by 'D' in serial), C145-2H
Build Years: 1977 revision
Serial Numbers: O-300-C engines subsequent to No. 21001
Technical Data:
- Engine displacement: 282 cu. in. (C-125), 301 cu. in. (C-145, O-300)
- Horsepower: 125 BHP (C-125), 145 BHP (C-145, O-300)
- Rated RPM: 2550 (C-125), 2700 (C-145, O-300)
- Compression ratio: 6.3:1 (C-125), 7.0:1 (C-145, O-300)
- Oil sump capacity: 8 U.S. quarts
- Firing order: 1-6-3-2-5-4
- Fuel octane rating: 80/87
Continental Manual Features & Content Preview
Continental C-125, C-145, and O-300 Series Aircraft Engine Overhaul Manual
- Covers 1977 Continental C-125, C-145, and O-300 series aircraft engines, including A, B, C, D, and E variants
- Official OEM publication, Form X30013, approved August 1977
- Contains 40 detailed illustrations, 16 comprehensive specification tables, and specialized ignition wiring schematics
- File is available immediately after purchase with no shipping wait
- Stored against your account so you can retrieve it after a hard-drive loss
- Full-text search finds any part number in seconds
- Laid out for standard letter and A4 printing
- This 1977 FAA-approved edition provides the factory-authorized overhaul standards for the 6-cylinder Continental engine line
Engine Configuration and Maintenance
This Continental C-125, C-145, and O-300 service manual provides technical data for the maintenance and overhaul of the 6-cylinder engine series. The documentation covers complete disassembly, cleaning, and inspection of engine components including the cylinder assemblies, crankshafts, connecting rods, and crankcase. It outlines specific procedures for packing and storage, as well as installation and removal from the aircraft. The text also explains the internal gear train analysis, detailing rotation and speed relationships for magnetos, oil pumps, generators, and starters. Proper how factory workshop documentation is structured is vital for the safe operation of these powerplants.
Technical Specifications and Operating Limits
Detailed tables within the publication provide precise tolerances, clearances, and torque values for engine assembly and inspection. Standard test acceptance procedures for each model are included to verify performance metrics during engine run-in. Specification highlights include maximum operating temperatures, oil pressures, and fuel system requirements for cruising and take-off conditions. The document contains essential reference data for maintaining structural integrity and clearance tolerances across the engine's operational life.
Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions.
An official 66-page Continental OEM overhaul manual covering the C-125, C-145, and O-300 aircraft engine series, documenting engine, disassembly, reassembly, inspection, and test specifications for the 1977-era 6-cylinder build.
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