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 - 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.
ACCESSORY DRIVE RATIOS	Gear Ratio	Direction of Rotation*
Magnetos	1.00 to 1	Clockwise
Fuel Pump	.5 to 1	(Plunger Operated)
Tachometer	.5 to 1	Counter Clockwise
		* Viewed from rear of engine