Lycoming engine specifications

TYPE
Four Cylinder, Direct Drive	Horizontally Opposed, Air Cooled
Type Certificate No.	210
PERFORMANCE
Rated Horsepower	65
Rated R.P.M.	2550
Cruising R.P.M.:
Economy	2200
Performance	2300
CYLINDERS
Bore	3-5/8 in.
Stroke	3-1/2 in.
Compression Ratio	6.5:1
Piston Displacement - Cubic inches	144.5
Head Temperature, Max. °F.	525°
Barrel Temperature, Max. °F	325°
FUEL & OIL
Fuel Octane	80
Oil Grade:
Summer - Temp. above 40°F	SAE-40
Winter - Temp. below 40°F	SAE-30
Oil Sump Capacity - Quarts	4 to 5
Oil Sump - Safe Min. Qty - Quarts	2 1/2
Oil Pressure:
Minimum Idling - (Lbs. Per Sq. In.)	15
Normal Operating - (Lbs. Per Sq. In.)	55 to 80
CRANKSHAFT
Crankshaft Rotation - Anti-Propeller End:	Clockwise
VALVES
Valve Rocker Clearance (cold)	0.015
Valve Timing - Hot:	Intake Opens 20° B.T.C.
	Intake Closes 65° A.B.C.
	Exhaust Opens 65° B.B.C.
	Exhaust Closes 20° A.T.C.
IGNITION
Spark Occurs - Degrees B.T.C.	25° B.T.C.
Spark Plug Gap - Shielded	.015 in.
Spark Plug Gap - Unshielded	.025 in.
Firing Order	1-3-2-4
WEIGHTS & DIMENSIONS
Standard Engine Dry Weight	165.5 lbs.
Propeller Attaching Parts and Baffles	5.33 lbs.
Engine Total Weight	170.83 lbs.
Engine Height	20.59 in.
Engine Width	29.56 in.
Engine Length	24.62 in.